diff --git a/cosmos/errors.go b/cosmos/errors.go
new file mode 100644
index 000000000..5df27462e
--- /dev/null
+++ b/cosmos/errors.go
@@ -0,0 +1,26 @@
+package cosmos
+
+import (
+	"github.com/cosmos/cosmos-sdk/types"
+)
+
+const (
+	// CodespaceMesg is a cosmos codespace for all mesg errors.
+	CodespaceMesg types.CodespaceType = "mesg"
+)
+
+// Base mesg codes.
+const (
+	CodeInternal   types.CodeType = 1000
+	CodeValidation types.CodeType = 2000
+)
+
+// NewMesgErrorf creates error with given code type and mesg codespace.
+func NewMesgErrorf(ct types.CodeType, format string, a ...interface{}) types.Error {
+	return types.NewError(CodespaceMesg, ct, format, a...)
+}
+
+// NewMesgWrapError creates error with given code type and mesg codespace.
+func NewMesgWrapError(ct types.CodeType, err error) types.Error {
+	return types.NewError(CodespaceMesg, ct, err.Error())
+}
diff --git a/cosmos/module.go b/cosmos/module.go
index 99b0dd533..cd9006bc4 100644
--- a/cosmos/module.go
+++ b/cosmos/module.go
@@ -149,11 +149,11 @@ func (m AppModule) NewQuerierHandler() cosmostypes.Querier {
 			if errsdk, ok := err.(cosmostypes.Error); ok {
 				return nil, errsdk
 			}
-			return nil, cosmostypes.ErrInternal(err.Error())
+			return nil, NewMesgWrapError(CodeInternal, err)
 		}
 		res, err := codec.MarshalBinaryBare(data)
 		if err != nil {
-			return nil, cosmostypes.ErrInternal(err.Error())
+			return nil, NewMesgWrapError(CodeInternal, err)
 		}
 		return res, nil
 	}
diff --git a/sdk/runner/backend.go b/sdk/runner/backend.go
index 338b21f9b..3ff66b0b9 100644
--- a/sdk/runner/backend.go
+++ b/sdk/runner/backend.go
@@ -40,12 +40,12 @@ func (s *Backend) handler(request cosmostypes.Request, msg cosmostypes.Msg) (has
 	case msgCreateRunner:
 		run, err := s.Create(request, &msg)
 		if err != nil {
-			return nil, cosmostypes.ErrInternal(err.Error())
+			return nil, cosmos.NewMesgWrapError(cosmos.CodeInternal, err)
 		}
 		return run.Hash, nil
 	case msgDeleteRunner:
 		if err := s.Delete(request, &msg); err != nil {
-			return nil, err
+			return nil, cosmos.NewMesgWrapError(cosmos.CodeInternal, err)
 		}
 		return nil, nil
 	default:
diff --git a/sdk/runner/msgs.go b/sdk/runner/msgs.go
index 19d0c3582..418e01099 100644
--- a/sdk/runner/msgs.go
+++ b/sdk/runner/msgs.go
@@ -3,6 +3,7 @@ package runnersdk
 import (
 	cosmostypes "github.com/cosmos/cosmos-sdk/types"
 	"github.com/mesg-foundation/engine/codec"
+	"github.com/mesg-foundation/engine/cosmos"
 	"github.com/mesg-foundation/engine/hash"
 	"github.com/mesg-foundation/engine/x/xvalidator"
 )
@@ -39,10 +40,10 @@ func (msg msgCreateRunner) ValidateBasic() cosmostypes.Error {
 		return cosmostypes.ErrInternal(err.Error())
 	}
 	if msg.ServiceHash.IsZero() {
-		return cosmostypes.ErrInternal("serviceHash is missing")
+		return cosmos.NewMesgErrorf(cosmos.CodeValidation, "serviceHash is missing")
 	}
 	if msg.EnvHash.IsZero() {
-		return cosmostypes.ErrInternal("envHash is missing")
+		return cosmos.NewMesgErrorf(cosmos.CodeValidation, "envHash is missing")
 	}
 	if msg.Address.Empty() {
 		return cosmostypes.ErrInvalidAddress("address is missing")
@@ -90,7 +91,7 @@ func (msg msgDeleteRunner) ValidateBasic() cosmostypes.Error {
 		return cosmostypes.ErrInternal(err.Error())
 	}
 	if msg.RunnerHash.IsZero() {
-		return cosmostypes.ErrInternal("runnerHash is missing")
+		return cosmos.NewMesgErrorf(cosmos.CodeValidation, "runnerHash is missing")
 	}
 	if msg.Address.Empty() {
 		return cosmostypes.ErrInvalidAddress("address is missing")
diff --git a/sdk/service/backend.go b/sdk/service/backend.go
index 19988ced5..2beb912f4 100644
--- a/sdk/service/backend.go
+++ b/sdk/service/backend.go
@@ -42,7 +42,7 @@ func (s *Backend) handler(request cosmostypes.Request, msg cosmostypes.Msg) (has
 	case msgCreateService:
 		srv, err := s.Create(request, &msg)
 		if err != nil {
-			return nil, err
+			return nil, cosmos.NewMesgWrapError(cosmos.CodeInternal, err)
 		}
 		return srv.Hash, nil
 	default: