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OpenAPI Specification

openapi: 3.2.0
info:
  title: MailBridge Activity API
  summary: Turn your own mailbox into a secure email API.
  version: 2026-10-20.1
  description: 'MailBridgeAPI connects a mailbox you own to authenticated HTTP endpoints.


    Use the account API key together with a mailbox API key to send email, read incoming messages, search activity and monitor mailbox readiness without distributing SMTP or IMAP passwords across projects.


    Compatible connections include standard SMTP/IMAP, Gmail, Microsoft 365, Yahoo Mail, Zoho Mail and iCloud Mail. Provider capabilities and limits still apply.


    Keep both API keys in server-side environment variables or a secret manager. Never expose them in browser code, public repositories or mobile application bundles.'
  termsOfService: https://mailbridgeapi.com/terms-of-service/
  contact:
    name: MailBridgeAPI Support
    url: https://mailbridgeapi.com/contact/
    email: info@mailbridgeapi.com
  license:
    name: MailBridgeAPI Terms of Service
    url: https://mailbridgeapi.com/terms-of-service/
  x-logo:
    url: https://mailbridgeapi.com/logo-mark.svg
    altText: MailBridgeAPI
servers:
- url: https://api.mailbridgeapi.com
  description: Production API
security:
- AccountKey: []
  MailboxKey: []
tags:
- name: Activity
  description: Search messages and build delivery or usage reporting.
paths:
  /email/sent/:
    get:
      summary: List sent-email activity
      parameters:
      - $ref: '#/components/parameters/Page'
      - $ref: '#/components/parameters/PerPage'
      - name: status
        in: query
        schema:
          type: string
          enum:
          - all
          - success
          - error
          default: all
      - name: recipient
        in: query
        schema:
          type: string
          format: email
      - $ref: '#/components/parameters/From'
      - $ref: '#/components/parameters/To'
      - name: source
        in: query
        schema:
          type: string
      - $ref: '#/components/parameters/IncludeBody'
      responses:
        '200':
          description: Paginated sent email activity
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '429':
          $ref: '#/components/responses/TooManyRequests'
        '500':
          $ref: '#/components/responses/ServerError'
      tags:
      - Activity
      operationId: listSentEmail
  /email/message/:
    get:
      summary: Get one sent or received message
      parameters:
      - name: direction
        in: query
        required: true
        schema:
          type: string
          enum:
          - sent
          - received
      - name: id
        in: query
        required: true
        schema:
          type: string
      responses:
        '200':
          description: Message detail
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          description: Message not found
        '429':
          $ref: '#/components/responses/TooManyRequests'
        '500':
          $ref: '#/components/responses/ServerError'
      tags:
      - Activity
      operationId: getEmailMessage
  /email/search/:
    get:
      summary: Search sent and received email metadata
      description: Searches message ids, subjects and sender or recipient addresses. Message bodies remain available only through the detail endpoint.
      parameters:
      - name: query
        in: query
        required: true
        schema:
          type: string
          minLength: 2
          maxLength: 120
      - name: direction
        in: query
        schema:
          type: string
          enum:
          - all
          - sent
          - received
          default: all
      - $ref: '#/components/parameters/Page'
      - $ref: '#/components/parameters/PerPage'
      - $ref: '#/components/parameters/From'
      - $ref: '#/components/parameters/To'
      responses:
        '200':
          description: Unified paginated email search results
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '429':
          $ref: '#/components/responses/TooManyRequests'
        '500':
          $ref: '#/components/responses/ServerError'
      tags:
      - Activity
      operationId: searchEmail
  /email/activity/:
    get:
      summary: Get mailbox activity totals and daily trends
      description: Also returns the success rate, leading request sources and most frequent error reasons.
      parameters:
      - name: days
        in: query
        schema:
          type: integer
          minimum: 1
          maximum: 90
          default: 30
      responses:
        '200':
          description: Totals, daily activity and diagnostic breakdowns
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '429':
          $ref: '#/components/responses/TooManyRequests'
        '500':
          $ref: '#/components/responses/ServerError'
      tags:
      - Activity
      operationId: getEmailActivity
components:
  parameters:
    Page:
      name: page
      in: query
      schema:
        type: integer
        minimum: 1
        default: 1
      description: One-based result page.
    IncludeBody:
      name: include_body
      in: query
      schema:
        type: boolean
        default: false
      description: Include message bodies only when needed.
    From:
      name: from
      in: query
      schema:
        type: string
        format: date
      description: Inclusive start date in YYYY-MM-DD format.
    PerPage:
      name: per_page
      in: query
      schema:
        type: integer
        minimum: 1
        maximum: 100
        default: 25
      description: Number of results per page.
    To:
      name: to
      in: query
      schema:
        type: string
        format: date
      description: Inclusive end date in YYYY-MM-DD format.
  schemas:
    Error:
      type: object
      required:
      - ok
      - error
      - meta
      properties:
        ok:
          const: false
        error:
          type: object
          required:
          - code
          - message
          properties:
            code:
              type: string
            message:
              type: string
          additionalProperties: false
        meta:
          $ref: '#/components/schemas/Meta'
      additionalProperties: false
    Pagination:
      type: object
      properties:
        page:
          type: integer
          minimum: 1
        per_page:
          type: integer
          minimum: 1
        total:
          type: integer
          minimum: 0
        pages:
          type: integer
          minimum: 0
        next_page_token:
          type:
          - string
          - 'null'
    Meta:
      type: object
      properties:
        request_id:
          type: string
        api_version:
          type: string
        timestamp:
          type: string
          format: date-time
        pagination:
          $ref: '#/components/schemas/Pagination'
      additionalProperties: false
  responses:
    ServerError:
      description: The mailbox provider rejected the operation or an internal service error occurred.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    TooManyRequests:
      description: The MailBridgeAPI or provider request limit was reached. Do not retry email sends blindly.
      headers:
        Retry-After:
          description: Seconds to wait before retrying when supplied.
          schema:
            type: integer
            minimum: 1
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    Unauthorized:
      description: The account API key or mailbox API key is missing, invalid, expired or not allowed to access this mailbox.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    BadRequest:
      description: The request is missing a required value or contains an invalid parameter.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
  securitySchemes:
    AccountKey:
      type: apiKey
      in: header
      name: X-API-Key
      description: 'Account API key. New endpoints also accept the value as an `Authorization: Bearer` token.'
    MailboxKey:
      type: apiKey
      in: header
      name: X-Mailbox-Key
      description: Mailbox API key selecting exactly one configured mailbox.
    AccountKeyQuery:
      type: apiKey
      in: query
      name: apikey
      description: Account API key used by legacy-compatible endpoints. Prefer headers for new integrations when supported.
    MailboxKeyQuery:
      type: apiKey
      in: query
      name: apikeybox
      description: Mailbox API key used by legacy-compatible endpoints.
externalDocs:
  description: Interactive documentation, guides and live endpoint tester
  url: https://mailbridgeapi.com/doc/