Terraform Error: Error creating API Gateway Deployment: BadRequestException: No integration defined for method

In your "aws_api_gateway_deployment" resource you will need to add a "depends_on" which will need to contain entries for:

• aws_api_gateway_method
• aws_api_gateway_integration

that are found in your terraform script, for example:

   resource "aws_api_gateway_deployment" "example" {
    
      depends_on = [
        aws_api_gateway_method.methodproxy,
        aws_api_gateway_integration.apilambda
      ]
      ...
   }

The problem it from either of the two resource not having been setup.

Double, triple, and quadruple check your JSON is a valid for the api body. This error is not very clear, but any issues with your JSON formatting or structure will also cause you to get the same result.

I personally did not define a terraform resource for aws_api_gateway_method or aws_api_gateway_integration in my configuration. Here is an example of what I had for a body and the subtle change that fixed the error.

For context, the goal here was to enable API Gateway to trigger a Lambda Function which means I also had a aws_lambda_permission resource defined that allows invocation of Lambda by API Gateway.

This was throwing Error: Error creating API Gateway Deployment: BadRequestException: No integration defined for method:

locals {
  body = jsonencode({
    swagger = "2.0"
    info = {
      title   = "Example"
      version = "1.0"
    }
    schemes = [
        "https"
    ]
    paths = {
      "/path" = {
        get = {
          responses = {
            "200" = {
              description = "200 response"
            }
          }
        }
        x-amazon-apigateway-integration = {
          type       = "AWS"
          uri        = module.lambda.invoke_arn
          httpMethod = "POST"
          responses = {
            default = {
              statusCode = 200
            }
          }
        }
      }
    }
  })
}

Correcting the JSON to this allowed the deployment to go through.

locals {
  body = jsonencode({
    swagger = "2.0"
    info = {
      title   = "Example"
      version = "1.0"
    }
    schemes = [
        "https"
    ]
    paths = {
      "/path" = {
        get = {
          responses = {
            "200" = {
              description = "200 response"
            }
          }
          x-amazon-apigateway-integration = {
            type       = "AWS"
            uri        = module.lambda.invoke_arn
            httpMethod = "POST"
            responses = {
              default = {
                statusCode = 200
              }
            }
          }
        }
      }
    }
  })
}