Mailtrap Email Sandbox API

openapi: 3.1.0
info:
  title: Mailtrap Email Sandbox API
  description: >-
    The Mailtrap Email Sandbox API provides a safe email testing environment
    to inspect and debug emails before sending to real recipients. The API
    supports sending test emails into virtual inboxes, then retrieving,
    analyzing, and managing those captured messages. Sandbox endpoints
    cover messages, inboxes, projects, spam reports, HTML analysis, and
    raw or formatted message bodies.
  version: '1.0'
  contact:
    name: Mailtrap Support
    url: https://help.mailtrap.io/
  termsOfService: https://mailtrap.io/terms-of-use/
externalDocs:
  description: Mailtrap Email Sandbox Documentation
  url: https://docs.mailtrap.io/
servers:
  - url: https://sandbox.api.mailtrap.io
    description: Sandbox API
  - url: https://mailtrap.io
    description: Mailtrap management API
security:
  - ApiTokenAuth: []
tags:
  - name: Send
    description: Send emails into a sandbox inbox
  - name: Inboxes
    description: Manage sandbox inboxes
  - name: Messages
    description: Inspect captured messages
paths:
  /api/send/{inbox_id}:
    post:
      operationId: sendToSandboxInbox
      summary: Send a test email to a sandbox inbox
      description: >-
        Send an email into a specific sandbox inbox for inspection and
        debugging. Uses the same JSON body shape as the production send API.
      tags:
        - Send
      parameters:
        - name: inbox_id
          in: path
          required: true
          schema:
            type: integer
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/SendRequest'
      responses:
        '200':
          description: Email captured by the sandbox inbox
        '401':
          description: Authentication failed
  /api/accounts/{account_id}/inboxes:
    get:
      operationId: listInboxes
      summary: List sandbox inboxes
      tags:
        - Inboxes
      parameters:
        - name: account_id
          in: path
          required: true
          schema:
            type: integer
      responses:
        '200':
          description: Inbox list
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/Inbox'
  /api/accounts/{account_id}/projects/{project_id}/inboxes:
    post:
      operationId: createInbox
      summary: Create a sandbox inbox in a project
      tags:
        - Inboxes
      parameters:
        - name: account_id
          in: path
          required: true
          schema:
            type: integer
        - name: project_id
          in: path
          required: true
          schema:
            type: integer
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                inbox:
                  type: object
                  properties:
                    name:
                      type: string
      responses:
        '201':
          description: Inbox created
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Inbox'
  /api/accounts/{account_id}/inboxes/{inbox_id}:
    get:
      operationId: getInbox
      summary: Get a sandbox inbox
      tags:
        - Inboxes
      parameters:
        - $ref: '#/components/parameters/AccountId'
        - $ref: '#/components/parameters/InboxId'
      responses:
        '200':
          description: Inbox details
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Inbox'
    delete:
      operationId: deleteInbox
      summary: Delete a sandbox inbox and all its emails
      tags:
        - Inboxes
      parameters:
        - $ref: '#/components/parameters/AccountId'
        - $ref: '#/components/parameters/InboxId'
      responses:
        '204':
          description: Inbox deleted
    patch:
      operationId: updateInbox
      summary: Update inbox attributes
      tags:
        - Inboxes
      parameters:
        - $ref: '#/components/parameters/AccountId'
        - $ref: '#/components/parameters/InboxId'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
      responses:
        '200':
          description: Inbox updated
  /api/accounts/{account_id}/inboxes/{inbox_id}/clean:
    patch:
      operationId: cleanInbox
      summary: Remove all messages from an inbox
      tags:
        - Inboxes
      parameters:
        - $ref: '#/components/parameters/AccountId'
        - $ref: '#/components/parameters/InboxId'
      responses:
        '200':
          description: Inbox cleaned
  /api/accounts/{account_id}/inboxes/{inbox_id}/all_read:
    patch:
      operationId: markAllRead
      summary: Mark all messages in the inbox as read
      tags:
        - Inboxes
      parameters:
        - $ref: '#/components/parameters/AccountId'
        - $ref: '#/components/parameters/InboxId'
      responses:
        '200':
          description: Messages marked as read
  /api/accounts/{account_id}/inboxes/{inbox_id}/reset_credentials:
    patch:
      operationId: resetCredentials
      summary: Reset SMTP credentials of the inbox
      tags:
        - Inboxes
      parameters:
        - $ref: '#/components/parameters/AccountId'
        - $ref: '#/components/parameters/InboxId'
      responses:
        '200':
          description: Credentials reset
  /api/accounts/{account_id}/inboxes/{inbox_id}/messages:
    get:
      operationId: listMessages
      summary: List captured messages in an inbox
      tags:
        - Messages
      parameters:
        - $ref: '#/components/parameters/AccountId'
        - $ref: '#/components/parameters/InboxId'
        - name: page
          in: query
          schema:
            type: integer
      responses:
        '200':
          description: Paginated messages
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/Message'
  /api/accounts/{account_id}/inboxes/{inbox_id}/messages/{message_id}:
    get:
      operationId: getMessage
      summary: Get a captured message
      tags:
        - Messages
      parameters:
        - $ref: '#/components/parameters/AccountId'
        - $ref: '#/components/parameters/InboxId'
        - $ref: '#/components/parameters/MessageId'
      responses:
        '200':
          description: Message details
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Message'
    patch:
      operationId: updateMessage
      summary: Update message attributes (e.g. mark read)
      tags:
        - Messages
      parameters:
        - $ref: '#/components/parameters/AccountId'
        - $ref: '#/components/parameters/InboxId'
        - $ref: '#/components/parameters/MessageId'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
      responses:
        '200':
          description: Message updated
    delete:
      operationId: deleteMessage
      summary: Delete a captured message
      tags:
        - Messages
      parameters:
        - $ref: '#/components/parameters/AccountId'
        - $ref: '#/components/parameters/InboxId'
        - $ref: '#/components/parameters/MessageId'
      responses:
        '204':
          description: Message deleted
  /api/accounts/{account_id}/inboxes/{inbox_id}/messages/{message_id}/forward:
    post:
      operationId: forwardMessage
      summary: Forward a captured message to a confirmed recipient
      tags:
        - Messages
      parameters:
        - $ref: '#/components/parameters/AccountId'
        - $ref: '#/components/parameters/InboxId'
        - $ref: '#/components/parameters/MessageId'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                email:
                  type: string
                  format: email
      responses:
        '200':
          description: Message forwarded
  /api/accounts/{account_id}/inboxes/{inbox_id}/messages/{message_id}/spam_report:
    get:
      operationId: getSpamReport
      summary: Get spam analysis for a message
      tags:
        - Messages
      parameters:
        - $ref: '#/components/parameters/AccountId'
        - $ref: '#/components/parameters/InboxId'
        - $ref: '#/components/parameters/MessageId'
      responses:
        '200':
          description: Spam analysis report
  /api/accounts/{account_id}/inboxes/{inbox_id}/messages/{message_id}/analyze:
    get:
      operationId: getHtmlAnalyze
      summary: Get HTML validation and compatibility report
      tags:
        - Messages
      parameters:
        - $ref: '#/components/parameters/AccountId'
        - $ref: '#/components/parameters/InboxId'
        - $ref: '#/components/parameters/MessageId'
      responses:
        '200':
          description: HTML analysis report
  /api/accounts/{account_id}/inboxes/{inbox_id}/messages/{message_id}/body.txt:
    get:
      operationId: getMessageBodyText
      summary: Get plain text body of a message
      tags:
        - Messages
      parameters:
        - $ref: '#/components/parameters/AccountId'
        - $ref: '#/components/parameters/InboxId'
        - $ref: '#/components/parameters/MessageId'
      responses:
        '200':
          description: Plain text body
          content:
            text/plain:
              schema:
                type: string
  /api/accounts/{account_id}/inboxes/{inbox_id}/messages/{message_id}/body.html:
    get:
      operationId: getMessageBodyHtml
      summary: Get HTML body of a message
      tags:
        - Messages
      parameters:
        - $ref: '#/components/parameters/AccountId'
        - $ref: '#/components/parameters/InboxId'
        - $ref: '#/components/parameters/MessageId'
      responses:
        '200':
          description: HTML body
          content:
            text/html:
              schema:
                type: string
  /api/accounts/{account_id}/inboxes/{inbox_id}/messages/{message_id}/body.raw:
    get:
      operationId: getMessageBodyRaw
      summary: Get raw message body
      tags:
        - Messages
      parameters:
        - $ref: '#/components/parameters/AccountId'
        - $ref: '#/components/parameters/InboxId'
        - $ref: '#/components/parameters/MessageId'
      responses:
        '200':
          description: Raw message
  /api/accounts/{account_id}/inboxes/{inbox_id}/messages/{message_id}/body.eml:
    get:
      operationId: getMessageEml
      summary: Download message in standard .eml format
      tags:
        - Messages
      parameters:
        - $ref: '#/components/parameters/AccountId'
        - $ref: '#/components/parameters/InboxId'
        - $ref: '#/components/parameters/MessageId'
      responses:
        '200':
          description: EML file
  /api/accounts/{account_id}/inboxes/{inbox_id}/messages/{message_id}/mail_headers:
    get:
      operationId: getMessageHeaders
      summary: Get email headers for a message
      tags:
        - Messages
      parameters:
        - $ref: '#/components/parameters/AccountId'
        - $ref: '#/components/parameters/InboxId'
        - $ref: '#/components/parameters/MessageId'
      responses:
        '200':
          description: Header collection
components:
  securitySchemes:
    ApiTokenAuth:
      type: apiKey
      in: header
      name: Api-Token
  parameters:
    AccountId:
      name: account_id
      in: path
      required: true
      schema:
        type: integer
    InboxId:
      name: inbox_id
      in: path
      required: true
      schema:
        type: integer
    MessageId:
      name: message_id
      in: path
      required: true
      schema:
        type: integer
  schemas:
    Address:
      type: object
      required: [email]
      properties:
        email:
          type: string
          format: email
        name:
          type: string
    SendRequest:
      type: object
      required: [from, to, subject]
      properties:
        from:
          $ref: '#/components/schemas/Address'
        to:
          type: array
          items:
            $ref: '#/components/schemas/Address'
        subject:
          type: string
        text:
          type: string
        html:
          type: string
    Inbox:
      type: object
      properties:
        id:
          type: integer
        name:
          type: string
        username:
          type: string
        password:
          type: string
        max_size:
          type: integer
        status:
          type: string
        emails_count:
          type: integer
        emails_unread_count:
          type: integer
        last_message_sent_at:
          type: string
          format: date-time
        smtp_ports:
          type: array
          items:
            type: integer
        pop3_ports:
          type: array
          items:
            type: integer
        domain:
          type: string
        project_id:
          type: integer
    Message:
      type: object
      properties:
        id:
          type: integer
        inbox_id:
          type: integer
        subject:
          type: string
        sent_at:
          type: string
          format: date-time
        from_email:
          type: string
        from_name:
          type: string
        to_email:
          type: string
        to_name:
          type: string
        is_read:
          type: boolean
        html_body_size:
          type: integer
        text_body_size:
          type: integer