diff --git a/codegen/smithy-aws-go-codegen/src/main/resources/software/amazon/smithy/aws/go/codegen/endpoints.json b/codegen/smithy-aws-go-codegen/src/main/resources/software/amazon/smithy/aws/go/codegen/endpoints.json
index 0e1d6f0b02a..76a7fe34068 100644
--- a/codegen/smithy-aws-go-codegen/src/main/resources/software/amazon/smithy/aws/go/codegen/endpoints.json
+++ b/codegen/smithy-aws-go-codegen/src/main/resources/software/amazon/smithy/aws/go/codegen/endpoints.json
@@ -8469,8 +8469,104 @@
         "endpoints" : {
           "ap-southeast-1" : { },
           "ap-southeast-2" : { },
+          "api-ap-southeast-1" : {
+            "credentialScope" : {
+              "region" : "ap-southeast-1"
+            },
+            "hostname" : "api.iottwinmaker.ap-southeast-1.amazonaws.com"
+          },
+          "api-ap-southeast-2" : {
+            "credentialScope" : {
+              "region" : "ap-southeast-2"
+            },
+            "hostname" : "api.iottwinmaker.ap-southeast-2.amazonaws.com"
+          },
+          "api-eu-central-1" : {
+            "credentialScope" : {
+              "region" : "eu-central-1"
+            },
+            "hostname" : "api.iottwinmaker.eu-central-1.amazonaws.com"
+          },
+          "api-eu-west-1" : {
+            "credentialScope" : {
+              "region" : "eu-west-1"
+            },
+            "hostname" : "api.iottwinmaker.eu-west-1.amazonaws.com"
+          },
+          "api-us-east-1" : {
+            "credentialScope" : {
+              "region" : "us-east-1"
+            },
+            "hostname" : "api.iottwinmaker.us-east-1.amazonaws.com"
+          },
+          "api-us-west-2" : {
+            "credentialScope" : {
+              "region" : "us-west-2"
+            },
+            "hostname" : "api.iottwinmaker.us-west-2.amazonaws.com"
+          },
+          "data-ap-southeast-1" : {
+            "credentialScope" : {
+              "region" : "ap-southeast-1"
+            },
+            "hostname" : "data.iottwinmaker.ap-southeast-1.amazonaws.com"
+          },
+          "data-ap-southeast-2" : {
+            "credentialScope" : {
+              "region" : "ap-southeast-2"
+            },
+            "hostname" : "data.iottwinmaker.ap-southeast-2.amazonaws.com"
+          },
+          "data-eu-central-1" : {
+            "credentialScope" : {
+              "region" : "eu-central-1"
+            },
+            "hostname" : "data.iottwinmaker.eu-central-1.amazonaws.com"
+          },
+          "data-eu-west-1" : {
+            "credentialScope" : {
+              "region" : "eu-west-1"
+            },
+            "hostname" : "data.iottwinmaker.eu-west-1.amazonaws.com"
+          },
+          "data-us-east-1" : {
+            "credentialScope" : {
+              "region" : "us-east-1"
+            },
+            "hostname" : "data.iottwinmaker.us-east-1.amazonaws.com"
+          },
+          "data-us-west-2" : {
+            "credentialScope" : {
+              "region" : "us-west-2"
+            },
+            "hostname" : "data.iottwinmaker.us-west-2.amazonaws.com"
+          },
           "eu-central-1" : { },
           "eu-west-1" : { },
+          "fips-api-us-east-1" : {
+            "credentialScope" : {
+              "region" : "us-east-1"
+            },
+            "hostname" : "api.iottwinmaker-fips.us-east-1.amazonaws.com"
+          },
+          "fips-api-us-west-2" : {
+            "credentialScope" : {
+              "region" : "us-west-2"
+            },
+            "hostname" : "api.iottwinmaker-fips.us-west-2.amazonaws.com"
+          },
+          "fips-data-us-east-1" : {
+            "credentialScope" : {
+              "region" : "us-east-1"
+            },
+            "hostname" : "data.iottwinmaker-fips.us-east-1.amazonaws.com"
+          },
+          "fips-data-us-west-2" : {
+            "credentialScope" : {
+              "region" : "us-west-2"
+            },
+            "hostname" : "data.iottwinmaker-fips.us-west-2.amazonaws.com"
+          },
           "fips-us-east-1" : {
             "credentialScope" : {
               "region" : "us-east-1"
@@ -10340,6 +10436,7 @@
           "ap-south-1" : { },
           "ap-southeast-1" : { },
           "ap-southeast-2" : { },
+          "ca-central-1" : { },
           "eu-central-1" : { },
           "eu-north-1" : { },
           "eu-west-1" : { },
@@ -21413,6 +21510,30 @@
       },
       "iottwinmaker" : {
         "endpoints" : {
+          "api-us-gov-west-1" : {
+            "credentialScope" : {
+              "region" : "us-gov-west-1"
+            },
+            "hostname" : "api.iottwinmaker.us-gov-west-1.amazonaws.com"
+          },
+          "data-us-gov-west-1" : {
+            "credentialScope" : {
+              "region" : "us-gov-west-1"
+            },
+            "hostname" : "data.iottwinmaker.us-gov-west-1.amazonaws.com"
+          },
+          "fips-api-us-gov-west-1" : {
+            "credentialScope" : {
+              "region" : "us-gov-west-1"
+            },
+            "hostname" : "api.iottwinmaker-fips.us-gov-west-1.amazonaws.com"
+          },
+          "fips-data-us-gov-west-1" : {
+            "credentialScope" : {
+              "region" : "us-gov-west-1"
+            },
+            "hostname" : "data.iottwinmaker-fips.us-gov-west-1.amazonaws.com"
+          },
           "fips-us-gov-west-1" : {
             "credentialScope" : {
               "region" : "us-gov-west-1"