MCP Gateway

fulcrum: "1.0"
name: gmail_send_email
description: Send email via Gmail API. Requires OAuth 2.0 authentication with Gmail send scope.

schema:
  input:
    type: object
    properties:
      to:
        type: string
        description: Recipient email address
        format: email
      subject:
        type: string
        description: Email subject
      body:
        type: string
        description: Email body (plain text or HTML)
      cc:
        type: string
        description: CC recipients (comma-separated)
      bcc:
        type: string
        description: BCC recipients (comma-separated)
      html:
        type: boolean
        description: Whether body is HTML
        default: false
    required:
      - to
      - subject
      - body
  output:
    type: object
    properties:
      id:
        type: string
        description: Message ID
      threadId:
        type: string
        description: Thread ID
      labelIds:
        type: array
        description: Labels applied to the message

providers:
  primary:
    service: rest
    cost_per_call: 0
    timeout: 10
    config:
      base_url: https://gmail.googleapis.com
      path: /gmail/v1/users/me/messages/send
      method: POST
      headers:
        Accept: "application/json"
        Content-Type: "application/json"
        Authorization: "Bearer {oauth.gmail}"
      body:
        raw: "{base64_encoded_email}"

cache:
  strategy: none
  ttl: 0

auth:
  required: true
  type: oauth
  scopes:
    - https://www.googleapis.com/auth/gmail.send
  key: oauth:gmail
  description: Authorize via Google OAuth 2.0 with Gmail send scope

metadata:
  category: communication
  tags:
    - email
    - google
    - gmail
    - communication
  cost_category: free
  execution_time: fast
  read_only: false
  rate_limit: 250 quotas/day (free), 1B/day (paid)
  docs: https://developers.google.com/gmail/api/reference/rest/v1/users.messages/send