diff --git a/go/api_spec/method.pb.go b/go/api_spec/method.pb.go
index 9f4c9b7..de7278b 100644
--- a/go/api_spec/method.pb.go
+++ b/go/api_spec/method.pb.go
@@ -136,6 +136,69 @@ func (HTTPBody_ContentType) EnumDescriptor() ([]byte, []int) {
 	return file_method_proto_rawDescGZIP(), []int{22, 0}
 }
 
+// Defines the possible error states we can reach while trying to generate a witness (request+response pair)
+type HTTPMethodErrorErrorType int32
+
+const (
+	// Represents the case where the agent timed out before it could create a complete witness.
+	HTTPMethodError_AGENT_TIMED_OUT HTTPMethodErrorErrorType = 0
+	// Represents the case where the agent could not parse the packet as expected.
+	HTTPMethodError_AGENT_PARSING_ERROR HTTPMethodErrorErrorType = 1
+	// Represents the case where the client closed the connection before the complete witness was generated.
+	// This could be due to a timeout, abrupt temination of the connection, etc.
+	HTTPMethodError_CLIENT_CLOSED HTTPMethodErrorErrorType = 2
+	// Represents the case where the server closed the connection before the complete witness was generated.
+	// This could be due to a timeout, abrupt temination of the connection, etc.
+	HTTPMethodError_SERVER_CLOSED HTTPMethodErrorErrorType = 3
+	// Other unknown error observed while generating a witness.
+	HTTPMethodError_OTHER HTTPMethodErrorErrorType = 5
+)
+
+// Enum value maps for HTTPMethodErrorErrorType.
+var (
+	HTTPMethodErrorErrorType_name = map[int32]string{
+		0: "AGENT_TIMED_OUT",
+		1: "AGENT_PARSING_ERROR",
+		2: "CLIENT_CLOSED",
+		3: "SERVER_CLOSED",
+		5: "OTHER",
+	}
+	HTTPMethodErrorErrorType_value = map[string]int32{
+		"AGENT_TIMED_OUT":     0,
+		"AGENT_PARSING_ERROR": 1,
+		"CLIENT_CLOSED":       2,
+		"SERVER_CLOSED":       3,
+		"OTHER":               5,
+	}
+)
+
+func (x HTTPMethodErrorErrorType) Enum() *HTTPMethodErrorErrorType {
+	p := new(HTTPMethodErrorErrorType)
+	*p = x
+	return p
+}
+
+func (x HTTPMethodErrorErrorType) String() string {
+	return protoimpl.X.EnumStringOf(x.Descriptor(), protoreflect.EnumNumber(x))
+}
+
+func (HTTPMethodErrorErrorType) Descriptor() protoreflect.EnumDescriptor {
+	return file_method_proto_enumTypes[2].Descriptor()
+}
+
+func (HTTPMethodErrorErrorType) Type() protoreflect.EnumType {
+	return &file_method_proto_enumTypes[2]
+}
+
+func (x HTTPMethodErrorErrorType) Number() protoreflect.EnumNumber {
+	return protoreflect.EnumNumber(x)
+}
+
+// Deprecated: Use HTTPMethodErrorErrorType.Descriptor instead.
+func (HTTPMethodErrorErrorType) EnumDescriptor() ([]byte, []int) {
+	return file_method_proto_rawDescGZIP(), []int{32, 0}
+}
+
 type Bool struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -2274,6 +2337,61 @@ func (x *HTTPMethodMeta) GetProcessingLatency() float32 {
 	return 0
 }
 
+type HTTPMethodError struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Type    HTTPMethodErrorErrorType `protobuf:"varint,1,opt,name=type,proto3,enum=api_spec.HTTPMethodErrorErrorType" json:"type,omitempty"`
+	Message string                   `protobuf:"bytes,2,opt,name=message,proto3" json:"message,omitempty"`
+}
+
+func (x *HTTPMethodError) Reset() {
+	*x = HTTPMethodError{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_method_proto_msgTypes[32]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *HTTPMethodError) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*HTTPMethodError) ProtoMessage() {}
+
+func (x *HTTPMethodError) ProtoReflect() protoreflect.Message {
+	mi := &file_method_proto_msgTypes[32]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use HTTPMethodError.ProtoReflect.Descriptor instead.
+func (*HTTPMethodError) Descriptor() ([]byte, []int) {
+	return file_method_proto_rawDescGZIP(), []int{32}
+}
+
+func (x *HTTPMethodError) GetType() HTTPMethodErrorErrorType {
+	if x != nil {
+		return x.Type
+	}
+	return HTTPMethodError_AGENT_TIMED_OUT
+}
+
+func (x *HTTPMethodError) GetMessage() string {
+	if x != nil {
+		return x.Message
+	}
+	return ""
+}
+
 type MethodMeta struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -2282,13 +2400,14 @@ type MethodMeta struct {
 	// Types that are assignable to Meta:
 	//	*MethodMeta_Grpc
 	//	*MethodMeta_Http
-	Meta isMethodMeta_Meta `protobuf_oneof:"meta"`
+	Meta   isMethodMeta_Meta  `protobuf_oneof:"meta"`
+	Errors []*HTTPMethodError `protobuf:"bytes,3,rep,name=errors,proto3" json:"errors,omitempty"`
 }
 
 func (x *MethodMeta) Reset() {
 	*x = MethodMeta{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_method_proto_msgTypes[32]
+		mi := &file_method_proto_msgTypes[33]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2301,7 +2420,7 @@ func (x *MethodMeta) String() string {
 func (*MethodMeta) ProtoMessage() {}
 
 func (x *MethodMeta) ProtoReflect() protoreflect.Message {
-	mi := &file_method_proto_msgTypes[32]
+	mi := &file_method_proto_msgTypes[33]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2314,7 +2433,7 @@ func (x *MethodMeta) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use MethodMeta.ProtoReflect.Descriptor instead.
 func (*MethodMeta) Descriptor() ([]byte, []int) {
-	return file_method_proto_rawDescGZIP(), []int{32}
+	return file_method_proto_rawDescGZIP(), []int{33}
 }
 
 func (m *MethodMeta) GetMeta() isMethodMeta_Meta {
@@ -2338,6 +2457,13 @@ func (x *MethodMeta) GetHttp() *HTTPMethodMeta {
 	return nil
 }
 
+func (x *MethodMeta) GetErrors() []*HTTPMethodError {
+	if x != nil {
+		return x.Errors
+	}
+	return nil
+}
+
 type isMethodMeta_Meta interface {
 	isMethodMeta_Meta()
 }
@@ -2372,7 +2498,7 @@ type Method struct {
 func (x *Method) Reset() {
 	*x = Method{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_method_proto_msgTypes[33]
+		mi := &file_method_proto_msgTypes[34]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -2385,7 +2511,7 @@ func (x *Method) String() string {
 func (*Method) ProtoMessage() {}
 
 func (x *Method) ProtoReflect() protoreflect.Message {
-	mi := &file_method_proto_msgTypes[33]
+	mi := &file_method_proto_msgTypes[34]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -2398,7 +2524,7 @@ func (x *Method) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use Method.ProtoReflect.Descriptor instead.
 func (*Method) Descriptor() ([]byte, []int) {
-	return file_method_proto_rawDescGZIP(), []int{33}
+	return file_method_proto_rawDescGZIP(), []int{34}
 }
 
 func (x *Method) GetId() *MethodID {
@@ -2678,40 +2804,56 @@ var file_method_proto_rawDesc = []byte{
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+	0x12, 0x24, 0x0a, 0x05, 0x76, 0x61, 0x6c, 0x75, 0x65, 0x18, 0x02, 0x20, 0x01, 0x28, 0x0b, 0x32,
+	0x0e, 0x2e, 0x61, 0x70, 0x69, 0x5f, 0x73, 0x70, 0x65, 0x63, 0x2e, 0x44, 0x61, 0x74, 0x61, 0x52,
+	0x05, 0x76, 0x61, 0x6c, 0x75, 0x65, 0x3a, 0x02, 0x38, 0x01, 0x1a, 0x4c, 0x0a, 0x0e, 0x52, 0x65,
+	0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x73, 0x45, 0x6e, 0x74, 0x72, 0x79, 0x12, 0x10, 0x0a, 0x03,
+	0x6b, 0x65, 0x79, 0x18, 0x01, 0x20, 0x01, 0x28, 0x09, 0x52, 0x03, 0x6b, 0x65, 0x79, 0x12, 0x24,
+	0x0a, 0x05, 0x76, 0x61, 0x6c, 0x75, 0x65, 0x18, 0x02, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x0e, 0x2e,
+	0x61, 0x70, 0x69, 0x5f, 0x73, 0x70, 0x65, 0x63, 0x2e, 0x44, 0x61, 0x74, 0x61, 0x52, 0x05, 0x76,
+	0x61, 0x6c, 0x75, 0x65, 0x3a, 0x02, 0x38, 0x01, 0x42, 0x2c, 0x5a, 0x2a, 0x61, 0x6b, 0x69, 0x74,
+	0x61, 0x73, 0x6f, 0x66, 0x74, 0x77, 0x61, 0x72, 0x65, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x73, 0x75,
+	0x70, 0x65, 0x72, 0x73, 0x74, 0x61, 0x72, 0x2f, 0x70, 0x62, 0x2f, 0x67, 0x6f, 0x2f, 0x61, 0x70,
+	0x69, 0x5f, 0x73, 0x70, 0x65, 0x63, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
@@ -2726,128 +2868,132 @@ func file_method_proto_rawDescGZIP() []byte {
 	return file_method_proto_rawDescData
 }
 
-var file_method_proto_enumTypes = make([]protoimpl.EnumInfo, 2)
-var file_method_proto_msgTypes = make([]protoimpl.MessageInfo, 40)
+var file_method_proto_enumTypes = make([]protoimpl.EnumInfo, 3)
+var file_method_proto_msgTypes = make([]protoimpl.MessageInfo, 41)
 var file_method_proto_goTypes = []interface{}{
-	(HTTPAuth_HTTPAuthType)(0), // 0: api_spec.HTTPAuth.HTTPAuthType
-	(HTTPBody_ContentType)(0),  // 1: api_spec.HTTPBody.ContentType
-	(*Bool)(nil),               // 2: api_spec.Bool
-	(*Bytes)(nil),              // 3: api_spec.Bytes
-	(*String)(nil),             // 4: api_spec.String
-	(*Int32)(nil),              // 5: api_spec.Int32
-	(*Int64)(nil),              // 6: api_spec.Int64
-	(*Uint32)(nil),             // 7: api_spec.Uint32
-	(*Uint64)(nil),             // 8: api_spec.Uint64
-	(*Double)(nil),             // 9: api_spec.Double
-	(*Float)(nil),              // 10: api_spec.Float
-	(*Primitive)(nil),          // 11: api_spec.Primitive
-	(*List)(nil),               // 12: api_spec.List
-	(*Struct)(nil),             // 13: api_spec.Struct
-	(*MapData)(nil),            // 14: api_spec.MapData
-	(*None)(nil),               // 15: api_spec.None
-	(*Optional)(nil),           // 16: api_spec.Optional
-	(*OneOf)(nil),              // 17: api_spec.OneOf
-	(*GRPCMeta)(nil),           // 18: api_spec.GRPCMeta
-	(*HTTPPath)(nil),           // 19: api_spec.HTTPPath
-	(*HTTPQuery)(nil),          // 20: api_spec.HTTPQuery
-	(*HTTPHeader)(nil),         // 21: api_spec.HTTPHeader
-	(*HTTPAuth)(nil),           // 22: api_spec.HTTPAuth
-	(*HTTPCookie)(nil),         // 23: api_spec.HTTPCookie
-	(*HTTPBody)(nil),           // 24: api_spec.HTTPBody
-	(*HTTPMultipart)(nil),      // 25: api_spec.HTTPMultipart
-	(*HTTPEmpty)(nil),          // 26: api_spec.HTTPEmpty
-	(*HTTPMeta)(nil),           // 27: api_spec.HTTPMeta
-	(*DataMeta)(nil),           // 28: api_spec.DataMeta
-	(*ExampleValue)(nil),       // 29: api_spec.ExampleValue
-	(*Data)(nil),               // 30: api_spec.Data
-	(*MethodID)(nil),           // 31: api_spec.MethodID
-	(*GRPCMethodMeta)(nil),     // 32: api_spec.GRPCMethodMeta
-	(*HTTPMethodMeta)(nil),     // 33: api_spec.HTTPMethodMeta
-	(*MethodMeta)(nil),         // 34: api_spec.MethodMeta
-	(*Method)(nil),             // 35: api_spec.Method
-	nil,                        // 36: api_spec.Primitive.FormatsEntry
-	nil,                        // 37: api_spec.Struct.FieldsEntry
-	nil,                        // 38: api_spec.OneOf.OptionsEntry
-	nil,                        // 39: api_spec.Data.ExampleValuesEntry
-	nil,                        // 40: api_spec.Method.ArgsEntry
-	nil,                        // 41: api_spec.Method.ResponsesEntry
-	(*BoolType)(nil),           // 42: api_spec.BoolType
-	(*BytesType)(nil),          // 43: api_spec.BytesType
-	(*StringType)(nil),         // 44: api_spec.StringType
-	(*Int32Type)(nil),          // 45: api_spec.Int32Type
-	(*Int64Type)(nil),          // 46: api_spec.Int64Type
-	(*Uint32Type)(nil),         // 47: api_spec.Uint32Type
-	(*Uint64Type)(nil),         // 48: api_spec.Uint64Type
-	(*DoubleType)(nil),         // 49: api_spec.DoubleType
-	(*FloatType)(nil),          // 50: api_spec.FloatType
-	(*AkitaAnnotations)(nil),   // 51: api_spec.AkitaAnnotations
-	(ApiType)(0),               // 52: api_spec.ApiType
+	(HTTPAuth_HTTPAuthType)(0),    // 0: api_spec.HTTPAuth.HTTPAuthType
+	(HTTPBody_ContentType)(0),     // 1: api_spec.HTTPBody.ContentType
+	(HTTPMethodErrorErrorType)(0), // 2: api_spec.HTTPMethodError.errorType
+	(*Bool)(nil),                  // 3: api_spec.Bool
+	(*Bytes)(nil),                 // 4: api_spec.Bytes
+	(*String)(nil),                // 5: api_spec.String
+	(*Int32)(nil),                 // 6: api_spec.Int32
+	(*Int64)(nil),                 // 7: api_spec.Int64
+	(*Uint32)(nil),                // 8: api_spec.Uint32
+	(*Uint64)(nil),                // 9: api_spec.Uint64
+	(*Double)(nil),                // 10: api_spec.Double
+	(*Float)(nil),                 // 11: api_spec.Float
+	(*Primitive)(nil),             // 12: api_spec.Primitive
+	(*List)(nil),                  // 13: api_spec.List
+	(*Struct)(nil),                // 14: api_spec.Struct
+	(*MapData)(nil),               // 15: api_spec.MapData
+	(*None)(nil),                  // 16: api_spec.None
+	(*Optional)(nil),              // 17: api_spec.Optional
+	(*OneOf)(nil),                 // 18: api_spec.OneOf
+	(*GRPCMeta)(nil),              // 19: api_spec.GRPCMeta
+	(*HTTPPath)(nil),              // 20: api_spec.HTTPPath
+	(*HTTPQuery)(nil),             // 21: api_spec.HTTPQuery
+	(*HTTPHeader)(nil),            // 22: api_spec.HTTPHeader
+	(*HTTPAuth)(nil),              // 23: api_spec.HTTPAuth
+	(*HTTPCookie)(nil),            // 24: api_spec.HTTPCookie
+	(*HTTPBody)(nil),              // 25: api_spec.HTTPBody
+	(*HTTPMultipart)(nil),         // 26: api_spec.HTTPMultipart
+	(*HTTPEmpty)(nil),             // 27: api_spec.HTTPEmpty
+	(*HTTPMeta)(nil),              // 28: api_spec.HTTPMeta
+	(*DataMeta)(nil),              // 29: api_spec.DataMeta
+	(*ExampleValue)(nil),          // 30: api_spec.ExampleValue
+	(*Data)(nil),                  // 31: api_spec.Data
+	(*MethodID)(nil),              // 32: api_spec.MethodID
+	(*GRPCMethodMeta)(nil),        // 33: api_spec.GRPCMethodMeta
+	(*HTTPMethodMeta)(nil),        // 34: api_spec.HTTPMethodMeta
+	(*HTTPMethodError)(nil),       // 35: api_spec.HTTPMethodError
+	(*MethodMeta)(nil),            // 36: api_spec.MethodMeta
+	(*Method)(nil),                // 37: api_spec.Method
+	nil,                           // 38: api_spec.Primitive.FormatsEntry
+	nil,                           // 39: api_spec.Struct.FieldsEntry
+	nil,                           // 40: api_spec.OneOf.OptionsEntry
+	nil,                           // 41: api_spec.Data.ExampleValuesEntry
+	nil,                           // 42: api_spec.Method.ArgsEntry
+	nil,                           // 43: api_spec.Method.ResponsesEntry
+	(*BoolType)(nil),              // 44: api_spec.BoolType
+	(*BytesType)(nil),             // 45: api_spec.BytesType
+	(*StringType)(nil),            // 46: api_spec.StringType
+	(*Int32Type)(nil),             // 47: api_spec.Int32Type
+	(*Int64Type)(nil),             // 48: api_spec.Int64Type
+	(*Uint32Type)(nil),            // 49: api_spec.Uint32Type
+	(*Uint64Type)(nil),            // 50: api_spec.Uint64Type
+	(*DoubleType)(nil),            // 51: api_spec.DoubleType
+	(*FloatType)(nil),             // 52: api_spec.FloatType
+	(*AkitaAnnotations)(nil),      // 53: api_spec.AkitaAnnotations
+	(ApiType)(0),                  // 54: api_spec.ApiType
 }
 var file_method_proto_depIdxs = []int32{
-	42, // 0: api_spec.Bool.type:type_name -> api_spec.BoolType
-	43, // 1: api_spec.Bytes.type:type_name -> api_spec.BytesType
-	44, // 2: api_spec.String.type:type_name -> api_spec.StringType
-	45, // 3: api_spec.Int32.type:type_name -> api_spec.Int32Type
-	46, // 4: api_spec.Int64.type:type_name -> api_spec.Int64Type
-	47, // 5: api_spec.Uint32.type:type_name -> api_spec.Uint32Type
-	48, // 6: api_spec.Uint64.type:type_name -> api_spec.Uint64Type
-	49, // 7: api_spec.Double.type:type_name -> api_spec.DoubleType
-	50, // 8: api_spec.Float.type:type_name -> api_spec.FloatType
-	2,  // 9: api_spec.Primitive.bool_value:type_name -> api_spec.Bool
-	3,  // 10: api_spec.Primitive.bytes_value:type_name -> api_spec.Bytes
-	4,  // 11: api_spec.Primitive.string_value:type_name -> api_spec.String
-	5,  // 12: api_spec.Primitive.int32_value:type_name -> api_spec.Int32
-	6,  // 13: api_spec.Primitive.int64_value:type_name -> api_spec.Int64
-	7,  // 14: api_spec.Primitive.uint32_value:type_name -> api_spec.Uint32
-	8,  // 15: api_spec.Primitive.uint64_value:type_name -> api_spec.Uint64
-	9,  // 16: api_spec.Primitive.double_value:type_name -> api_spec.Double
-	10, // 17: api_spec.Primitive.float_value:type_name -> api_spec.Float
-	51, // 18: api_spec.Primitive.akita_annotations:type_name -> api_spec.AkitaAnnotations
-	36, // 19: api_spec.Primitive.formats:type_name -> api_spec.Primitive.FormatsEntry
-	30, // 20: api_spec.List.elems:type_name -> api_spec.Data
-	37, // 21: api_spec.Struct.fields:type_name -> api_spec.Struct.FieldsEntry
-	14, // 22: api_spec.Struct.map_type:type_name -> api_spec.MapData
-	30, // 23: api_spec.MapData.key:type_name -> api_spec.Data
-	30, // 24: api_spec.MapData.value:type_name -> api_spec.Data
-	30, // 25: api_spec.Optional.data:type_name -> api_spec.Data
-	15, // 26: api_spec.Optional.none:type_name -> api_spec.None
-	38, // 27: api_spec.OneOf.options:type_name -> api_spec.OneOf.OptionsEntry
+	44, // 0: api_spec.Bool.type:type_name -> api_spec.BoolType
+	45, // 1: api_spec.Bytes.type:type_name -> api_spec.BytesType
+	46, // 2: api_spec.String.type:type_name -> api_spec.StringType
+	47, // 3: api_spec.Int32.type:type_name -> api_spec.Int32Type
+	48, // 4: api_spec.Int64.type:type_name -> api_spec.Int64Type
+	49, // 5: api_spec.Uint32.type:type_name -> api_spec.Uint32Type
+	50, // 6: api_spec.Uint64.type:type_name -> api_spec.Uint64Type
+	51, // 7: api_spec.Double.type:type_name -> api_spec.DoubleType
+	52, // 8: api_spec.Float.type:type_name -> api_spec.FloatType
+	3,  // 9: api_spec.Primitive.bool_value:type_name -> api_spec.Bool
+	4,  // 10: api_spec.Primitive.bytes_value:type_name -> api_spec.Bytes
+	5,  // 11: api_spec.Primitive.string_value:type_name -> api_spec.String
+	6,  // 12: api_spec.Primitive.int32_value:type_name -> api_spec.Int32
+	7,  // 13: api_spec.Primitive.int64_value:type_name -> api_spec.Int64
+	8,  // 14: api_spec.Primitive.uint32_value:type_name -> api_spec.Uint32
+	9,  // 15: api_spec.Primitive.uint64_value:type_name -> api_spec.Uint64
+	10, // 16: api_spec.Primitive.double_value:type_name -> api_spec.Double
+	11, // 17: api_spec.Primitive.float_value:type_name -> api_spec.Float
+	53, // 18: api_spec.Primitive.akita_annotations:type_name -> api_spec.AkitaAnnotations
+	38, // 19: api_spec.Primitive.formats:type_name -> api_spec.Primitive.FormatsEntry
+	31, // 20: api_spec.List.elems:type_name -> api_spec.Data
+	39, // 21: api_spec.Struct.fields:type_name -> api_spec.Struct.FieldsEntry
+	15, // 22: api_spec.Struct.map_type:type_name -> api_spec.MapData
+	31, // 23: api_spec.MapData.key:type_name -> api_spec.Data
+	31, // 24: api_spec.MapData.value:type_name -> api_spec.Data
+	31, // 25: api_spec.Optional.data:type_name -> api_spec.Data
+	16, // 26: api_spec.Optional.none:type_name -> api_spec.None
+	40, // 27: api_spec.OneOf.options:type_name -> api_spec.OneOf.OptionsEntry
 	0,  // 28: api_spec.HTTPAuth.type:type_name -> api_spec.HTTPAuth.HTTPAuthType
 	1,  // 29: api_spec.HTTPBody.content_type:type_name -> api_spec.HTTPBody.ContentType
-	19, // 30: api_spec.HTTPMeta.path:type_name -> api_spec.HTTPPath
-	20, // 31: api_spec.HTTPMeta.query:type_name -> api_spec.HTTPQuery
-	21, // 32: api_spec.HTTPMeta.header:type_name -> api_spec.HTTPHeader
-	23, // 33: api_spec.HTTPMeta.cookie:type_name -> api_spec.HTTPCookie
-	24, // 34: api_spec.HTTPMeta.body:type_name -> api_spec.HTTPBody
-	26, // 35: api_spec.HTTPMeta.empty:type_name -> api_spec.HTTPEmpty
-	22, // 36: api_spec.HTTPMeta.auth:type_name -> api_spec.HTTPAuth
-	25, // 37: api_spec.HTTPMeta.multipart:type_name -> api_spec.HTTPMultipart
-	18, // 38: api_spec.DataMeta.grpc:type_name -> api_spec.GRPCMeta
-	27, // 39: api_spec.DataMeta.http:type_name -> api_spec.HTTPMeta
-	11, // 40: api_spec.Data.primitive:type_name -> api_spec.Primitive
-	13, // 41: api_spec.Data.struct:type_name -> api_spec.Struct
-	12, // 42: api_spec.Data.list:type_name -> api_spec.List
-	16, // 43: api_spec.Data.optional:type_name -> api_spec.Optional
-	17, // 44: api_spec.Data.oneof:type_name -> api_spec.OneOf
-	28, // 45: api_spec.Data.meta:type_name -> api_spec.DataMeta
-	39, // 46: api_spec.Data.example_values:type_name -> api_spec.Data.ExampleValuesEntry
-	52, // 47: api_spec.MethodID.api_type:type_name -> api_spec.ApiType
-	32, // 48: api_spec.MethodMeta.grpc:type_name -> api_spec.GRPCMethodMeta
-	33, // 49: api_spec.MethodMeta.http:type_name -> api_spec.HTTPMethodMeta
-	31, // 50: api_spec.Method.id:type_name -> api_spec.MethodID
-	40, // 51: api_spec.Method.args:type_name -> api_spec.Method.ArgsEntry
-	41, // 52: api_spec.Method.responses:type_name -> api_spec.Method.ResponsesEntry
-	34, // 53: api_spec.Method.meta:type_name -> api_spec.MethodMeta
-	30, // 54: api_spec.Struct.FieldsEntry.value:type_name -> api_spec.Data
-	30, // 55: api_spec.OneOf.OptionsEntry.value:type_name -> api_spec.Data
-	29, // 56: api_spec.Data.ExampleValuesEntry.value:type_name -> api_spec.ExampleValue
-	30, // 57: api_spec.Method.ArgsEntry.value:type_name -> api_spec.Data
-	30, // 58: api_spec.Method.ResponsesEntry.value:type_name -> api_spec.Data
-	59, // [59:59] is the sub-list for method output_type
-	59, // [59:59] is the sub-list for method input_type
-	59, // [59:59] is the sub-list for extension type_name
-	59, // [59:59] is the sub-list for extension extendee
-	0,  // [0:59] is the sub-list for field type_name
+	20, // 30: api_spec.HTTPMeta.path:type_name -> api_spec.HTTPPath
+	21, // 31: api_spec.HTTPMeta.query:type_name -> api_spec.HTTPQuery
+	22, // 32: api_spec.HTTPMeta.header:type_name -> api_spec.HTTPHeader
+	24, // 33: api_spec.HTTPMeta.cookie:type_name -> api_spec.HTTPCookie
+	25, // 34: api_spec.HTTPMeta.body:type_name -> api_spec.HTTPBody
+	27, // 35: api_spec.HTTPMeta.empty:type_name -> api_spec.HTTPEmpty
+	23, // 36: api_spec.HTTPMeta.auth:type_name -> api_spec.HTTPAuth
+	26, // 37: api_spec.HTTPMeta.multipart:type_name -> api_spec.HTTPMultipart
+	19, // 38: api_spec.DataMeta.grpc:type_name -> api_spec.GRPCMeta
+	28, // 39: api_spec.DataMeta.http:type_name -> api_spec.HTTPMeta
+	12, // 40: api_spec.Data.primitive:type_name -> api_spec.Primitive
+	14, // 41: api_spec.Data.struct:type_name -> api_spec.Struct
+	13, // 42: api_spec.Data.list:type_name -> api_spec.List
+	17, // 43: api_spec.Data.optional:type_name -> api_spec.Optional
+	18, // 44: api_spec.Data.oneof:type_name -> api_spec.OneOf
+	29, // 45: api_spec.Data.meta:type_name -> api_spec.DataMeta
+	41, // 46: api_spec.Data.example_values:type_name -> api_spec.Data.ExampleValuesEntry
+	54, // 47: api_spec.MethodID.api_type:type_name -> api_spec.ApiType
+	2,  // 48: api_spec.HTTPMethodError.type:type_name -> api_spec.HTTPMethodError.errorType
+	33, // 49: api_spec.MethodMeta.grpc:type_name -> api_spec.GRPCMethodMeta
+	34, // 50: api_spec.MethodMeta.http:type_name -> api_spec.HTTPMethodMeta
+	35, // 51: api_spec.MethodMeta.errors:type_name -> api_spec.HTTPMethodError
+	32, // 52: api_spec.Method.id:type_name -> api_spec.MethodID
+	42, // 53: api_spec.Method.args:type_name -> api_spec.Method.ArgsEntry
+	43, // 54: api_spec.Method.responses:type_name -> api_spec.Method.ResponsesEntry
+	36, // 55: api_spec.Method.meta:type_name -> api_spec.MethodMeta
+	31, // 56: api_spec.Struct.FieldsEntry.value:type_name -> api_spec.Data
+	31, // 57: api_spec.OneOf.OptionsEntry.value:type_name -> api_spec.Data
+	30, // 58: api_spec.Data.ExampleValuesEntry.value:type_name -> api_spec.ExampleValue
+	31, // 59: api_spec.Method.ArgsEntry.value:type_name -> api_spec.Data
+	31, // 60: api_spec.Method.ResponsesEntry.value:type_name -> api_spec.Data
+	61, // [61:61] is the sub-list for method output_type
+	61, // [61:61] is the sub-list for method input_type
+	61, // [61:61] is the sub-list for extension type_name
+	61, // [61:61] is the sub-list for extension extendee
+	0,  // [0:61] is the sub-list for field type_name
 }
 
 func init() { file_method_proto_init() }
@@ -3243,7 +3389,7 @@ func file_method_proto_init() {
 			}
 		}
 		file_method_proto_msgTypes[32].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*MethodMeta); i {
+			switch v := v.(*HTTPMethodError); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -3255,6 +3401,18 @@ func file_method_proto_init() {
 			}
 		}
 		file_method_proto_msgTypes[33].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*MethodMeta); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_method_proto_msgTypes[34].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*Method); i {
 			case 0:
 				return &v.state
@@ -3303,7 +3461,7 @@ func file_method_proto_init() {
 		(*Data_Optional)(nil),
 		(*Data_Oneof)(nil),
 	}
-	file_method_proto_msgTypes[32].OneofWrappers = []interface{}{
+	file_method_proto_msgTypes[33].OneofWrappers = []interface{}{
 		(*MethodMeta_Grpc)(nil),
 		(*MethodMeta_Http)(nil),
 	}
@@ -3312,8 +3470,8 @@ func file_method_proto_init() {
 		File: protoimpl.DescBuilder{
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_method_proto_rawDesc,
-			NumEnums:      2,
-			NumMessages:   40,
+			NumEnums:      3,
+			NumMessages:   41,
 			NumExtensions: 0,
 			NumServices:   0,
 		},
diff --git a/proto/api_spec/method.proto b/proto/api_spec/method.proto
index c156c56..1242c0b 100644
--- a/proto/api_spec/method.proto
+++ b/proto/api_spec/method.proto
@@ -308,11 +308,37 @@ message HTTPMethodMeta {
   float processing_latency = 4;  
 }
 
+message HTTPMethodError {
+  // Defines the possible error states we can reach while trying to generate a witness (request+response pair)
+  enum errorType {
+    // Represents the case where the agent timed out before it could create a complete witness.
+    AGENT_TIMED_OUT = 0;
+
+    // Represents the case where the agent could not parse the packet as expected.
+    AGENT_PARSING_ERROR = 1;
+
+    // Represents the case where the client closed the connection before the complete witness was generated.
+    // This could be due to a timeout, abrupt temination of the connection, etc.
+    CLIENT_CLOSED = 2;
+
+    // Represents the case where the server closed the connection before the complete witness was generated.
+    // This could be due to a timeout, abrupt temination of the connection, etc.
+    SERVER_CLOSED = 3;
+
+    // Other unknown error observed while generating a witness.
+    OTHER = 5;
+  }
+
+  errorType type = 1;
+  string message = 2;
+}
+
 message MethodMeta {
   oneof meta {
     GRPCMethodMeta grpc = 1;
     HTTPMethodMeta http = 2;
   }
+  repeated HTTPMethodError errors = 3;
 }
 
 message Method {
diff --git a/py/api_spec/method_pb2.py b/py/api_spec/method_pb2.py
index b4ae61c..0e4bb6a 100644
--- a/py/api_spec/method_pb2.py
+++ b/py/api_spec/method_pb2.py
@@ -21,7 +21,7 @@
   syntax='proto3',
   serialized_options=b'Z*akitasoftware.com/superstar/pb/go/api_spec',
   create_key=_descriptor._internal_create_key,
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\x01(\t\x12#\n\x08\x61pi_type\x18\x02 \x01(\x0e\x32\x11.api_spec.ApiType\"\x10\n\x0eGRPCMethodMeta\"a\n\x0eHTTPMethodMeta\x12\x0e\n\x06method\x18\x01 \x01(\t\x12\x15\n\rpath_template\x18\x02 \x01(\t\x12\x0c\n\x04host\x18\x03 \x01(\t\x12\x1a\n\x12processing_latency\x18\x04 \x01(\x02\"\xc1\x01\n\x0fHTTPMethodError\x12\x31\n\x04type\x18\x01 \x01(\x0e\x32#.api_spec.HTTPMethodError.errorType\x12\x0f\n\x07message\x18\x02 \x01(\t\"j\n\terrorType\x12\x13\n\x0f\x41GENT_TIMED_OUT\x10\x00\x12\x17\n\x13\x41GENT_PARSING_ERROR\x10\x01\x12\x11\n\rCLIENT_CLOSED\x10\x02\x12\x11\n\rSERVER_CLOSED\x10\x03\x12\t\n\x05OTHER\x10\x05\"\x93\x01\n\nMethodMeta\x12(\n\x04grpc\x18\x01 \x01(\x0b\x32\x18.api_spec.GRPCMethodMetaH\x00\x12(\n\x04http\x18\x02 \x01(\x0b\x32\x18.api_spec.HTTPMethodMetaH\x00\x12)\n\x06\x65rrors\x18\x03 \x03(\x0b\x32\x19.api_spec.HTTPMethodErrorB\x06\n\x04meta\"\xa9\x02\n\x06Method\x12\x1e\n\x02id\x18\x01 \x01(\x0b\x32\x12.api_spec.MethodID\x12(\n\x04\x61rgs\x18\x02 \x03(\x0b\x32\x1a.api_spec.Method.ArgsEntry\x12\x32\n\tresponses\x18\x03 \x03(\x0b\x32\x1f.api_spec.Method.ResponsesEntry\x12\"\n\x04meta\x18\x04 \x01(\x0b\x32\x14.api_spec.MethodMeta\x1a;\n\tArgsEntry\x12\x0b\n\x03key\x18\x01 \x01(\t\x12\x1d\n\x05value\x18\x02 \x01(\x0b\x32\x0e.api_spec.Data:\x02\x38\x01\x1a@\n\x0eResponsesEntry\x12\x0b\n\x03key\x18\x01 \x01(\t\x12\x1d\n\x05value\x18\x02 \x01(\x0b\x32\x0e.api_spec.Data:\x02\x38\x01\x42,Z*akitasoftware.com/superstar/pb/go/api_specb\x06proto3'
   ,
   dependencies=[api__type__pb2.DESCRIPTOR,types__pb2.DESCRIPTOR,])
 
@@ -117,6 +117,46 @@
 )
 _sym_db.RegisterEnumDescriptor(_HTTPBODY_CONTENTTYPE)
 
+_HTTPMETHODERROR_ERRORTYPE = _descriptor.EnumDescriptor(
+  name='errorType',
+  full_name='api_spec.HTTPMethodError.errorType',
+  filename=None,
+  file=DESCRIPTOR,
+  create_key=_descriptor._internal_create_key,
+  values=[
+    _descriptor.EnumValueDescriptor(
+      name='AGENT_TIMED_OUT', index=0, number=0,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='AGENT_PARSING_ERROR', index=1, number=1,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='CLIENT_CLOSED', index=2, number=2,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='SERVER_CLOSED', index=3, number=3,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+    _descriptor.EnumValueDescriptor(
+      name='OTHER', index=4, number=5,
+      serialized_options=None,
+      type=None,
+      create_key=_descriptor._internal_create_key),
+  ],
+  containing_type=None,
+  serialized_options=None,
+  serialized_start=3339,
+  serialized_end=3445,
+)
+_sym_db.RegisterEnumDescriptor(_HTTPMETHODERROR_ERRORTYPE)
+
 
 _BOOL = _descriptor.Descriptor(
   name='Bool',
@@ -1615,6 +1655,46 @@
 )
 
 
+_HTTPMETHODERROR = _descriptor.Descriptor(
+  name='HTTPMethodError',
+  full_name='api_spec.HTTPMethodError',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  create_key=_descriptor._internal_create_key,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='type', full_name='api_spec.HTTPMethodError.type', index=0,
+      number=1, type=14, cpp_type=8, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='message', full_name='api_spec.HTTPMethodError.message', index=1,
+      number=2, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=b"".decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+    _HTTPMETHODERROR_ERRORTYPE,
+  ],
+  serialized_options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=3252,
+  serialized_end=3445,
+)
+
+
 _METHODMETA = _descriptor.Descriptor(
   name='MethodMeta',
   full_name='api_spec.MethodMeta',
@@ -1637,6 +1717,13 @@
       message_type=None, enum_type=None, containing_type=None,
       is_extension=False, extension_scope=None,
       serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
+    _descriptor.FieldDescriptor(
+      name='errors', full_name='api_spec.MethodMeta.errors', index=2,
+      number=3, type=11, cpp_type=10, label=3,
+      has_default_value=False, default_value=[],
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      serialized_options=None, file=DESCRIPTOR,  create_key=_descriptor._internal_create_key),
   ],
   extensions=[
   ],
@@ -1654,8 +1741,8 @@
       create_key=_descriptor._internal_create_key,
     fields=[]),
   ],
-  serialized_start=3251,
-  serialized_end=3355,
+  serialized_start=3448,
+  serialized_end=3595,
 )
 
 
@@ -1693,8 +1780,8 @@
   extension_ranges=[],
   oneofs=[
   ],
-  serialized_start=3530,
-  serialized_end=3589,
+  serialized_start=3770,
+  serialized_end=3829,
 )
 
 _METHOD_RESPONSESENTRY = _descriptor.Descriptor(
@@ -1731,8 +1818,8 @@
   extension_ranges=[],
   oneofs=[
   ],
-  serialized_start=3591,
-  serialized_end=3655,
+  serialized_start=3831,
+  serialized_end=3895,
 )
 
 _METHOD = _descriptor.Descriptor(
@@ -1783,8 +1870,8 @@
   extension_ranges=[],
   oneofs=[
   ],
-  serialized_start=3358,
-  serialized_end=3655,
+  serialized_start=3598,
+  serialized_end=3895,
 )
 
 _BOOL.fields_by_name['type'].message_type = types__pb2._BOOLTYPE
@@ -1922,8 +2009,11 @@
   _DATA.fields_by_name['oneof'])
 _DATA.fields_by_name['oneof'].containing_oneof = _DATA.oneofs_by_name['value']
 _METHODID.fields_by_name['api_type'].enum_type = api__type__pb2._APITYPE
+_HTTPMETHODERROR.fields_by_name['type'].enum_type = _HTTPMETHODERROR_ERRORTYPE
+_HTTPMETHODERROR_ERRORTYPE.containing_type = _HTTPMETHODERROR
 _METHODMETA.fields_by_name['grpc'].message_type = _GRPCMETHODMETA
 _METHODMETA.fields_by_name['http'].message_type = _HTTPMETHODMETA
+_METHODMETA.fields_by_name['errors'].message_type = _HTTPMETHODERROR
 _METHODMETA.oneofs_by_name['meta'].fields.append(
   _METHODMETA.fields_by_name['grpc'])
 _METHODMETA.fields_by_name['grpc'].containing_oneof = _METHODMETA.oneofs_by_name['meta']
@@ -1970,6 +2060,7 @@
 DESCRIPTOR.message_types_by_name['MethodID'] = _METHODID
 DESCRIPTOR.message_types_by_name['GRPCMethodMeta'] = _GRPCMETHODMETA
 DESCRIPTOR.message_types_by_name['HTTPMethodMeta'] = _HTTPMETHODMETA
+DESCRIPTOR.message_types_by_name['HTTPMethodError'] = _HTTPMETHODERROR
 DESCRIPTOR.message_types_by_name['MethodMeta'] = _METHODMETA
 DESCRIPTOR.message_types_by_name['Method'] = _METHOD
 _sym_db.RegisterFileDescriptor(DESCRIPTOR)
@@ -2230,6 +2321,13 @@
   })
 _sym_db.RegisterMessage(HTTPMethodMeta)
 
+HTTPMethodError = _reflection.GeneratedProtocolMessageType('HTTPMethodError', (_message.Message,), {
+  'DESCRIPTOR' : _HTTPMETHODERROR,
+  '__module__' : 'method_pb2'
+  # @@protoc_insertion_point(class_scope:api_spec.HTTPMethodError)
+  })
+_sym_db.RegisterMessage(HTTPMethodError)
+
 MethodMeta = _reflection.GeneratedProtocolMessageType('MethodMeta', (_message.Message,), {
   'DESCRIPTOR' : _METHODMETA,
   '__module__' : 'method_pb2'
diff --git a/ts/api_spec/api_type_pb.js b/ts/api_spec/api_type_pb.js
index 4919b98..b87502d 100644
--- a/ts/api_spec/api_type_pb.js
+++ b/ts/api_spec/api_type_pb.js
@@ -13,13 +13,13 @@
 
 var jspb = require('google-protobuf');
 var goog = jspb;
-var global = (function() {
-  if (this) { return this; }
-  if (typeof window !== 'undefined') { return window; }
-  if (typeof global !== 'undefined') { return global; }
-  if (typeof self !== 'undefined') { return self; }
-  return Function('return this')();
-}.call(null));
+var global =
+    (typeof globalThis !== 'undefined' && globalThis) ||
+    (typeof window !== 'undefined' && window) ||
+    (typeof global !== 'undefined' && global) ||
+    (typeof self !== 'undefined' && self) ||
+    (function () { return this; }).call(null) ||
+    Function('return this')();
 
 goog.exportSymbol('proto.api_spec.ApiType', null, global);
 /**
diff --git a/ts/api_spec/method_pb.d.ts b/ts/api_spec/method_pb.d.ts
index e4a1a03..1a0dfc3 100644
--- a/ts/api_spec/method_pb.d.ts
+++ b/ts/api_spec/method_pb.d.ts
@@ -987,6 +987,38 @@ export namespace HTTPMethodMeta {
     }
 }
 
+export class HTTPMethodError extends jspb.Message { 
+    getType(): HTTPMethodError.errorType;
+    setType(value: HTTPMethodError.errorType): HTTPMethodError;
+    getMessage(): string;
+    setMessage(value: string): HTTPMethodError;
+
+    serializeBinary(): Uint8Array;
+    toObject(includeInstance?: boolean): HTTPMethodError.AsObject;
+    static toObject(includeInstance: boolean, msg: HTTPMethodError): HTTPMethodError.AsObject;
+    static extensions: {[key: number]: jspb.ExtensionFieldInfo<jspb.Message>};
+    static extensionsBinary: {[key: number]: jspb.ExtensionFieldBinaryInfo<jspb.Message>};
+    static serializeBinaryToWriter(message: HTTPMethodError, writer: jspb.BinaryWriter): void;
+    static deserializeBinary(bytes: Uint8Array): HTTPMethodError;
+    static deserializeBinaryFromReader(message: HTTPMethodError, reader: jspb.BinaryReader): HTTPMethodError;
+}
+
+export namespace HTTPMethodError {
+    export type AsObject = {
+        type: HTTPMethodError.errorType,
+        message: string,
+    }
+
+    export enum errorType {
+    AGENT_TIMED_OUT = 0,
+    AGENT_PARSING_ERROR = 1,
+    CLIENT_CLOSED = 2,
+    SERVER_CLOSED = 3,
+    OTHER = 5,
+    }
+
+}
+
 export class MethodMeta extends jspb.Message { 
 
     hasGrpc(): boolean;
@@ -998,6 +1030,10 @@ export class MethodMeta extends jspb.Message {
     clearHttp(): void;
     getHttp(): HTTPMethodMeta | undefined;
     setHttp(value?: HTTPMethodMeta): MethodMeta;
+    clearErrorsList(): void;
+    getErrorsList(): Array<HTTPMethodError>;
+    setErrorsList(value: Array<HTTPMethodError>): MethodMeta;
+    addErrors(value?: HTTPMethodError, index?: number): HTTPMethodError;
 
     getMetaCase(): MethodMeta.MetaCase;
 
@@ -1015,6 +1051,7 @@ export namespace MethodMeta {
     export type AsObject = {
         grpc?: GRPCMethodMeta.AsObject,
         http?: HTTPMethodMeta.AsObject,
+        errorsList: Array<HTTPMethodError.AsObject>,
     }
 
     export enum MetaCase {
diff --git a/ts/api_spec/method_pb.js b/ts/api_spec/method_pb.js
index 85c5ef1..4e8016d 100644
--- a/ts/api_spec/method_pb.js
+++ b/ts/api_spec/method_pb.js
@@ -13,13 +13,13 @@
 
 var jspb = require('google-protobuf');
 var goog = jspb;
-var global = (function() {
-  if (this) { return this; }
-  if (typeof window !== 'undefined') { return window; }
-  if (typeof global !== 'undefined') { return global; }
-  if (typeof self !== 'undefined') { return self; }
-  return Function('return this')();
-}.call(null));
+var global =
+    (typeof globalThis !== 'undefined' && globalThis) ||
+    (typeof window !== 'undefined' && window) ||
+    (typeof global !== 'undefined' && global) ||
+    (typeof self !== 'undefined' && self) ||
+    (function () { return this; }).call(null) ||
+    Function('return this')();
 
 var api_type_pb = require('./api_type_pb.js');
 goog.object.extend(proto, api_type_pb);
@@ -45,6 +45,8 @@ goog.exportSymbol('proto.api_spec.HTTPEmpty', null, global);
 goog.exportSymbol('proto.api_spec.HTTPHeader', null, global);
 goog.exportSymbol('proto.api_spec.HTTPMeta', null, global);
 goog.exportSymbol('proto.api_spec.HTTPMeta.LocationCase', null, global);
+goog.exportSymbol('proto.api_spec.HTTPMethodError', null, global);
+goog.exportSymbol('proto.api_spec.HTTPMethodError.errorType', null, global);
 goog.exportSymbol('proto.api_spec.HTTPMethodMeta', null, global);
 goog.exportSymbol('proto.api_spec.HTTPMultipart', null, global);
 goog.exportSymbol('proto.api_spec.HTTPPath', null, global);
@@ -739,6 +741,27 @@ if (goog.DEBUG && !COMPILED) {
    */
   proto.api_spec.HTTPMethodMeta.displayName = 'proto.api_spec.HTTPMethodMeta';
 }
+/**
+ * Generated by JsPbCodeGenerator.
+ * @param {Array=} opt_data Optional initial data array, typically from a
+ * server response, or constructed directly in Javascript. The array is used
+ * in place and becomes part of the constructed object. It is not cloned.
+ * If no data is provided, the constructed object will be empty, but still
+ * valid.
+ * @extends {jspb.Message}
+ * @constructor
+ */
+proto.api_spec.HTTPMethodError = function(opt_data) {
+  jspb.Message.initialize(this, opt_data, 0, -1, null, null);
+};
+goog.inherits(proto.api_spec.HTTPMethodError, jspb.Message);
+if (goog.DEBUG && !COMPILED) {
+  /**
+   * @public
+   * @override
+   */
+  proto.api_spec.HTTPMethodError.displayName = 'proto.api_spec.HTTPMethodError';
+}
 /**
  * Generated by JsPbCodeGenerator.
  * @param {Array=} opt_data Optional initial data array, typically from a
@@ -750,7 +773,7 @@ if (goog.DEBUG && !COMPILED) {
  * @constructor
  */
 proto.api_spec.MethodMeta = function(opt_data) {
-  jspb.Message.initialize(this, opt_data, 0, -1, null, proto.api_spec.MethodMeta.oneofGroups_);
+  jspb.Message.initialize(this, opt_data, 0, -1, proto.api_spec.MethodMeta.repeatedFields_, proto.api_spec.MethodMeta.oneofGroups_);
 };
 goog.inherits(proto.api_spec.MethodMeta, jspb.Message);
 if (goog.DEBUG && !COMPILED) {
@@ -3179,7 +3202,8 @@ proto.api_spec.Primitive.prototype.getFormatsMap = function(opt_noLazyCreate) {
  */
 proto.api_spec.Primitive.prototype.clearFormatsMap = function() {
   this.getFormatsMap().clear();
-  return this;};
+  return this;
+};
 
 
 /**
@@ -3504,7 +3528,8 @@ proto.api_spec.Struct.prototype.getFieldsMap = function(opt_noLazyCreate) {
  */
 proto.api_spec.Struct.prototype.clearFieldsMap = function() {
   this.getFieldsMap().clear();
-  return this;};
+  return this;
+};
 
 
 /**
@@ -4217,7 +4242,8 @@ proto.api_spec.OneOf.prototype.getOptionsMap = function(opt_noLazyCreate) {
  */
 proto.api_spec.OneOf.prototype.clearOptionsMap = function() {
   this.getOptionsMap().clear();
-  return this;};
+  return this;
+};
 
 
 /**
@@ -6798,7 +6824,8 @@ proto.api_spec.Data.prototype.getExampleValuesMap = function(opt_noLazyCreate) {
  */
 proto.api_spec.Data.prototype.clearExampleValuesMap = function() {
   this.getExampleValuesMap().clear();
-  return this;};
+  return this;
+};
 
 
 
@@ -7283,6 +7310,184 @@ proto.api_spec.HTTPMethodMeta.prototype.setProcessingLatency = function(value) {
 
 
 
+
+
+if (jspb.Message.GENERATE_TO_OBJECT) {
+/**
+ * Creates an object representation of this proto.
+ * Field names that are reserved in JavaScript and will be renamed to pb_name.
+ * Optional fields that are not set will be set to undefined.
+ * To access a reserved field use, foo.pb_<name>, eg, foo.pb_default.
+ * For the list of reserved names please see:
+ *     net/proto2/compiler/js/internal/generator.cc#kKeyword.
+ * @param {boolean=} opt_includeInstance Deprecated. whether to include the
+ *     JSPB instance for transitional soy proto support:
+ *     http://goto/soy-param-migration
+ * @return {!Object}
+ */
+proto.api_spec.HTTPMethodError.prototype.toObject = function(opt_includeInstance) {
+  return proto.api_spec.HTTPMethodError.toObject(opt_includeInstance, this);
+};
+
+
+/**
+ * Static version of the {@see toObject} method.
+ * @param {boolean|undefined} includeInstance Deprecated. Whether to include
+ *     the JSPB instance for transitional soy proto support:
+ *     http://goto/soy-param-migration
+ * @param {!proto.api_spec.HTTPMethodError} msg The msg instance to transform.
+ * @return {!Object}
+ * @suppress {unusedLocalVariables} f is only used for nested messages
+ */
+proto.api_spec.HTTPMethodError.toObject = function(includeInstance, msg) {
+  var f, obj = {
+    type: jspb.Message.getFieldWithDefault(msg, 1, 0),
+    message: jspb.Message.getFieldWithDefault(msg, 2, "")
+  };
+
+  if (includeInstance) {
+    obj.$jspbMessageInstance = msg;
+  }
+  return obj;
+};
+}
+
+
+/**
+ * Deserializes binary data (in protobuf wire format).
+ * @param {jspb.ByteSource} bytes The bytes to deserialize.
+ * @return {!proto.api_spec.HTTPMethodError}
+ */
+proto.api_spec.HTTPMethodError.deserializeBinary = function(bytes) {
+  var reader = new jspb.BinaryReader(bytes);
+  var msg = new proto.api_spec.HTTPMethodError;
+  return proto.api_spec.HTTPMethodError.deserializeBinaryFromReader(msg, reader);
+};
+
+
+/**
+ * Deserializes binary data (in protobuf wire format) from the
+ * given reader into the given message object.
+ * @param {!proto.api_spec.HTTPMethodError} msg The message object to deserialize into.
+ * @param {!jspb.BinaryReader} reader The BinaryReader to use.
+ * @return {!proto.api_spec.HTTPMethodError}
+ */
+proto.api_spec.HTTPMethodError.deserializeBinaryFromReader = function(msg, reader) {
+  while (reader.nextField()) {
+    if (reader.isEndGroup()) {
+      break;
+    }
+    var field = reader.getFieldNumber();
+    switch (field) {
+    case 1:
+      var value = /** @type {!proto.api_spec.HTTPMethodError.errorType} */ (reader.readEnum());
+      msg.setType(value);
+      break;
+    case 2:
+      var value = /** @type {string} */ (reader.readString());
+      msg.setMessage(value);
+      break;
+    default:
+      reader.skipField();
+      break;
+    }
+  }
+  return msg;
+};
+
+
+/**
+ * Serializes the message to binary data (in protobuf wire format).
+ * @return {!Uint8Array}
+ */
+proto.api_spec.HTTPMethodError.prototype.serializeBinary = function() {
+  var writer = new jspb.BinaryWriter();
+  proto.api_spec.HTTPMethodError.serializeBinaryToWriter(this, writer);
+  return writer.getResultBuffer();
+};
+
+
+/**
+ * Serializes the given message to binary data (in protobuf wire
+ * format), writing to the given BinaryWriter.
+ * @param {!proto.api_spec.HTTPMethodError} message
+ * @param {!jspb.BinaryWriter} writer
+ * @suppress {unusedLocalVariables} f is only used for nested messages
+ */
+proto.api_spec.HTTPMethodError.serializeBinaryToWriter = function(message, writer) {
+  var f = undefined;
+  f = message.getType();
+  if (f !== 0.0) {
+    writer.writeEnum(
+      1,
+      f
+    );
+  }
+  f = message.getMessage();
+  if (f.length > 0) {
+    writer.writeString(
+      2,
+      f
+    );
+  }
+};
+
+
+/**
+ * @enum {number}
+ */
+proto.api_spec.HTTPMethodError.errorType = {
+  AGENT_TIMED_OUT: 0,
+  AGENT_PARSING_ERROR: 1,
+  CLIENT_CLOSED: 2,
+  SERVER_CLOSED: 3,
+  OTHER: 5
+};
+
+/**
+ * optional errorType type = 1;
+ * @return {!proto.api_spec.HTTPMethodError.errorType}
+ */
+proto.api_spec.HTTPMethodError.prototype.getType = function() {
+  return /** @type {!proto.api_spec.HTTPMethodError.errorType} */ (jspb.Message.getFieldWithDefault(this, 1, 0));
+};
+
+
+/**
+ * @param {!proto.api_spec.HTTPMethodError.errorType} value
+ * @return {!proto.api_spec.HTTPMethodError} returns this
+ */
+proto.api_spec.HTTPMethodError.prototype.setType = function(value) {
+  return jspb.Message.setProto3EnumField(this, 1, value);
+};
+
+
+/**
+ * optional string message = 2;
+ * @return {string}
+ */
+proto.api_spec.HTTPMethodError.prototype.getMessage = function() {
+  return /** @type {string} */ (jspb.Message.getFieldWithDefault(this, 2, ""));
+};
+
+
+/**
+ * @param {string} value
+ * @return {!proto.api_spec.HTTPMethodError} returns this
+ */
+proto.api_spec.HTTPMethodError.prototype.setMessage = function(value) {
+  return jspb.Message.setProto3StringField(this, 2, value);
+};
+
+
+
+/**
+ * List of repeated fields within this message type.
+ * @private {!Array<number>}
+ * @const
+ */
+proto.api_spec.MethodMeta.repeatedFields_ = [3];
+
 /**
  * Oneof group definitions for this message. Each group defines the field
  * numbers belonging to that group. When of these fields' value is set, all
@@ -7341,7 +7546,9 @@ proto.api_spec.MethodMeta.prototype.toObject = function(opt_includeInstance) {
 proto.api_spec.MethodMeta.toObject = function(includeInstance, msg) {
   var f, obj = {
     grpc: (f = msg.getGrpc()) && proto.api_spec.GRPCMethodMeta.toObject(includeInstance, f),
-    http: (f = msg.getHttp()) && proto.api_spec.HTTPMethodMeta.toObject(includeInstance, f)
+    http: (f = msg.getHttp()) && proto.api_spec.HTTPMethodMeta.toObject(includeInstance, f),
+    errorsList: jspb.Message.toObjectList(msg.getErrorsList(),
+    proto.api_spec.HTTPMethodError.toObject, includeInstance)
   };
 
   if (includeInstance) {
@@ -7388,6 +7595,11 @@ proto.api_spec.MethodMeta.deserializeBinaryFromReader = function(msg, reader) {
       reader.readMessage(value,proto.api_spec.HTTPMethodMeta.deserializeBinaryFromReader);
       msg.setHttp(value);
       break;
+    case 3:
+      var value = new proto.api_spec.HTTPMethodError;
+      reader.readMessage(value,proto.api_spec.HTTPMethodError.deserializeBinaryFromReader);
+      msg.addErrors(value);
+      break;
     default:
       reader.skipField();
       break;
@@ -7433,6 +7645,14 @@ proto.api_spec.MethodMeta.serializeBinaryToWriter = function(message, writer) {
       proto.api_spec.HTTPMethodMeta.serializeBinaryToWriter
     );
   }
+  f = message.getErrorsList();
+  if (f.length > 0) {
+    writer.writeRepeatedMessage(
+      3,
+      f,
+      proto.api_spec.HTTPMethodError.serializeBinaryToWriter
+    );
+  }
 };
 
 
@@ -7510,6 +7730,44 @@ proto.api_spec.MethodMeta.prototype.hasHttp = function() {
 };
 
 
+/**
+ * repeated HTTPMethodError errors = 3;
+ * @return {!Array<!proto.api_spec.HTTPMethodError>}
+ */
+proto.api_spec.MethodMeta.prototype.getErrorsList = function() {
+  return /** @type{!Array<!proto.api_spec.HTTPMethodError>} */ (
+    jspb.Message.getRepeatedWrapperField(this, proto.api_spec.HTTPMethodError, 3));
+};
+
+
+/**
+ * @param {!Array<!proto.api_spec.HTTPMethodError>} value
+ * @return {!proto.api_spec.MethodMeta} returns this
+*/
+proto.api_spec.MethodMeta.prototype.setErrorsList = function(value) {
+  return jspb.Message.setRepeatedWrapperField(this, 3, value);
+};
+
+
+/**
+ * @param {!proto.api_spec.HTTPMethodError=} opt_value
+ * @param {number=} opt_index
+ * @return {!proto.api_spec.HTTPMethodError}
+ */
+proto.api_spec.MethodMeta.prototype.addErrors = function(opt_value, opt_index) {
+  return jspb.Message.addToRepeatedWrapperField(this, 3, opt_value, proto.api_spec.HTTPMethodError, opt_index);
+};
+
+
+/**
+ * Clears the list making it empty but non-null.
+ * @return {!proto.api_spec.MethodMeta} returns this
+ */
+proto.api_spec.MethodMeta.prototype.clearErrorsList = function() {
+  return this.setErrorsList([]);
+};
+
+
 
 
 
@@ -7716,7 +7974,8 @@ proto.api_spec.Method.prototype.getArgsMap = function(opt_noLazyCreate) {
  */
 proto.api_spec.Method.prototype.clearArgsMap = function() {
   this.getArgsMap().clear();
-  return this;};
+  return this;
+};
 
 
 /**
@@ -7738,7 +7997,8 @@ proto.api_spec.Method.prototype.getResponsesMap = function(opt_noLazyCreate) {
  */
 proto.api_spec.Method.prototype.clearResponsesMap = function() {
   this.getResponsesMap().clear();
-  return this;};
+  return this;
+};
 
 
 /**
diff --git a/ts/api_spec/sequence_pb.js b/ts/api_spec/sequence_pb.js
index 0500a62..faa75cb 100644
--- a/ts/api_spec/sequence_pb.js
+++ b/ts/api_spec/sequence_pb.js
@@ -13,13 +13,13 @@
 
 var jspb = require('google-protobuf');
 var goog = jspb;
-var global = (function() {
-  if (this) { return this; }
-  if (typeof window !== 'undefined') { return window; }
-  if (typeof global !== 'undefined') { return global; }
-  if (typeof self !== 'undefined') { return self; }
-  return Function('return this')();
-}.call(null));
+var global =
+    (typeof globalThis !== 'undefined' && globalThis) ||
+    (typeof window !== 'undefined' && window) ||
+    (typeof global !== 'undefined' && global) ||
+    (typeof self !== 'undefined' && self) ||
+    (function () { return this; }).call(null) ||
+    Function('return this')();
 
 var method_pb = require('./method_pb.js');
 goog.object.extend(proto, method_pb);
@@ -2714,7 +2714,8 @@ proto.api_spec.StructTemplate.prototype.getFieldTemplatesMap = function(opt_noLa
  */
 proto.api_spec.StructTemplate.prototype.clearFieldTemplatesMap = function() {
   this.getFieldTemplatesMap().clear();
-  return this;};
+  return this;
+};
 
 
 
@@ -3699,7 +3700,8 @@ proto.api_spec.MethodTemplate.prototype.getArgTemplatesMap = function(opt_noLazy
  */
 proto.api_spec.MethodTemplate.prototype.clearArgTemplatesMap = function() {
   this.getArgTemplatesMap().clear();
-  return this;};
+  return this;
+};
 
 
 /**
@@ -3721,7 +3723,8 @@ proto.api_spec.MethodTemplate.prototype.getResponsesMap = function(opt_noLazyCre
  */
 proto.api_spec.MethodTemplate.prototype.clearResponsesMap = function() {
   this.getResponsesMap().clear();
-  return this;};
+  return this;
+};
 
 
 /**
diff --git a/ts/api_spec/spec_pb.js b/ts/api_spec/spec_pb.js
index 0eaf077..9bb0ef6 100644
--- a/ts/api_spec/spec_pb.js
+++ b/ts/api_spec/spec_pb.js
@@ -13,13 +13,13 @@
 
 var jspb = require('google-protobuf');
 var goog = jspb;
-var global = (function() {
-  if (this) { return this; }
-  if (typeof window !== 'undefined') { return window; }
-  if (typeof global !== 'undefined') { return global; }
-  if (typeof self !== 'undefined') { return self; }
-  return Function('return this')();
-}.call(null));
+var global =
+    (typeof globalThis !== 'undefined' && globalThis) ||
+    (typeof window !== 'undefined' && window) ||
+    (typeof global !== 'undefined' && global) ||
+    (typeof self !== 'undefined' && self) ||
+    (function () { return this; }).call(null) ||
+    Function('return this')();
 
 var method_pb = require('./method_pb.js');
 goog.object.extend(proto, method_pb);
@@ -257,7 +257,8 @@ proto.api_spec.APISpec.prototype.getTagsMap = function(opt_noLazyCreate) {
  */
 proto.api_spec.APISpec.prototype.clearTagsMap = function() {
   this.getTagsMap().clear();
-  return this;};
+  return this;
+};
 
 
 
diff --git a/ts/api_spec/types_pb.js b/ts/api_spec/types_pb.js
index c8abebc..227a7db 100644
--- a/ts/api_spec/types_pb.js
+++ b/ts/api_spec/types_pb.js
@@ -13,13 +13,13 @@
 
 var jspb = require('google-protobuf');
 var goog = jspb;
-var global = (function() {
-  if (this) { return this; }
-  if (typeof window !== 'undefined') { return window; }
-  if (typeof global !== 'undefined') { return global; }
-  if (typeof self !== 'undefined') { return self; }
-  return Function('return this')();
-}.call(null));
+var global =
+    (typeof globalThis !== 'undefined' && globalThis) ||
+    (typeof window !== 'undefined' && window) ||
+    (typeof global !== 'undefined' && global) ||
+    (typeof self !== 'undefined' && self) ||
+    (function () { return this; }).call(null) ||
+    Function('return this')();
 
 var google_protobuf_wrappers_pb = require('google-protobuf/google/protobuf/wrappers_pb.js');
 goog.object.extend(proto, google_protobuf_wrappers_pb);
diff --git a/ts/api_spec/witness_pb.js b/ts/api_spec/witness_pb.js
index c5d4742..4810a9f 100644
--- a/ts/api_spec/witness_pb.js
+++ b/ts/api_spec/witness_pb.js
@@ -13,13 +13,13 @@
 
 var jspb = require('google-protobuf');
 var goog = jspb;
-var global = (function() {
-  if (this) { return this; }
-  if (typeof window !== 'undefined') { return window; }
-  if (typeof global !== 'undefined') { return global; }
-  if (typeof self !== 'undefined') { return self; }
-  return Function('return this')();
-}.call(null));
+var global =
+    (typeof globalThis !== 'undefined' && globalThis) ||
+    (typeof window !== 'undefined' && window) ||
+    (typeof global !== 'undefined' && global) ||
+    (typeof self !== 'undefined' && self) ||
+    (function () { return this; }).call(null) ||
+    Function('return this')();
 
 var method_pb = require('./method_pb.js');
 goog.object.extend(proto, method_pb);