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How to pass API Gateway authorizer context value as an HTTP header


I have a scenario where I need to send custom headers from the API gateway after successfully authorized using lambda authorizer.

From the authorizer, I will be sending the JSON policy return with the context JSON key-value pair as below.

  "principalId": "xxxxxxxxxx",
  "policyDocument": {
    "Version": "2012-10-17",
    "Statement": [
        "Action": "execute-api:Invoke",
        "Effect": "Allow",
        "Resource": "*"
  "context": {
    "company_id": "xxxxx-xxx-xxxxxx",

My question is, now I need to pass the context key-value pair as custom headers to the minimal API from the API gateway.

Can you please suggest to me how to achieve this, since I am started learning AWS a month ago and working on the same? It will be helpful if I get some suggestions from the people who worked on these scenarios before.

Note: Lambda function is deployed with .net 6 minimal API and API gateway resources call the deployed lambda

API gateway resources are lambda proxy enabled in the lambda integration part.

2 Answers

I am assuming you need to add the custom headers before you send the request to your backend. API Gateway lets you use mapping templates for this -

There is an example provided in this Support Knowledge Center article that gets into the weeds -,from%20the%20original%20API%20request.

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answered a month ago

Hi, @Nirmal Kumar

I hosted the Minimal API with API Gateway + Lambda and experimented with passing the Lambda authorizer context value as a custom header for my request.

As a method, you need to disable Lambda proxy integration, customize the mapping template, and map the AuthorizerContext to the request header.

Please take a look at the detailed verification contents and methods summarized in the article. (I'm sorry in Japanese)

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answered a month ago
  • Thanks a lot for the reply Iwasa.

    Do u have the source code for the same?

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