generated: '2026-06-20'
method: searched
source: live probes of AWS Lambda API + corporate hosts
notes: >-
  The regional Lambda data-plane host (lambda.{region}.amazonaws.com) requires a
  SigV4-signed request and returns 403 to unauthenticated well-known probes.
  The corporate aws.amazon.com host publishes an RFC 9116 security.txt.
hosts:
  - host: https://aws.amazon.com
    documents:
      - path: /.well-known/security.txt
        status: 200
        file: aws-lambda-security.txt
      - path: /.well-known/ai-plugin.json
        status: 404
  - host: https://lambda.us-east-1.amazonaws.com
    documents:
      - path: /.well-known/security.txt
        status: 403
      - path: /.well-known/openid-configuration
        status: 403
      - path: /.well-known/oauth-authorization-server
        status: 403
      - path: /.well-known/api-catalog
        status: 403