overlay: 1.0.0
info:
  title: API Evangelist enhancements for Mailchimp Transactional API
  version: 1.0.0
x-generated: '2026-06-20'
x-method: generated
extends: openapi/mailchimp-transactional-api-openapi.yml
actions:
  - target: $.info
    update:
      x-apievangelist-provider: mailchimp
      x-apievangelist-api: mailchimp:mailchimp-transactional-api
      x-apievangelist-artifacts:
        authentication: authentication/mailchimp-authentication.yml
        errors: errors/mailchimp-problem-types.yml
        conventions: conventions/mailchimp-conventions.yml
        sandbox: sandbox/mailchimp-sandbox.yml
        mcp: mcp/mailchimp-mcp.yml
      x-apievangelist-mcp-server: https://mandrillapp.com/mcp
  - target: $.info
    update:
      x-mailchimp-transactional-note: >-
        All Transactional (Mandrill) calls are HTTP POST with the API key in the
        JSON body "key" parameter (or the X-MC-ApiKey header). A test API key
        exercises the API in test mode without delivering mail — see
        sandbox/mailchimp-sandbox.yml.