generated: '2026-06-20'
method: searched
source: >-
  Probed /.well-known/ discovery surface on the ACM regional API host and the
  AWS corporate host on 2026-06-20.
hosts:
- host: https://acm.us-east-1.amazonaws.com
  documents:
  - path: /.well-known/security.txt
    status: 404
  - path: /.well-known/openid-configuration
    status: 404
  - path: /.well-known/oauth-authorization-server
    status: 404
  - path: /.well-known/api-catalog
    status: 404
  - path: /.well-known/ai-plugin.json
    status: 404
  note: >-
    ACM regional API endpoints authenticate with AWS Signature Version 4, not
    OAuth/OIDC, and expose no /.well-known/ discovery documents.
- host: https://aws.amazon.com
  documents:
  - path: /.well-known/security.txt          # RFC 9116
    status: 200
    file: amazon-certificate-manager-security.txt