Maileroo Email API

openapi: 3.1.0
info:
  title: Maileroo Email API
  description: >-
    The Maileroo REST API allows sending transactional and marketing emails
    via JSON requests with high deliverability. Supports HTML and plain text
    emails, attachments, tracking, templates, scheduled delivery, and bulk
    sending. All requests are authenticated via an API sending key passed in
    the X-Api-Key header or as a Bearer token in the Authorization header.
  version: '2.0'
  contact:
    name: Maileroo Support
    url: https://maileroo.com/docs/
  termsOfService: https://maileroo.com/terms
externalDocs:
  description: Maileroo Email API Documentation
  url: https://maileroo.com/docs/email-api/introduction/
servers:
  - url: https://smtp.maileroo.com/api/v2
    description: Production
security:
  - ApiKeyAuth: []
  - BearerAuth: []
tags:
  - name: Emails
    description: Send transactional and bulk emails
  - name: Scheduled
    description: Manage scheduled email deliveries
paths:
  /emails:
    post:
      operationId: sendBasicEmail
      summary: Send a basic email
      description: >-
        Send a transactional email with HTML and/or plain text content.
        Supports attachments, tracking, custom tags and headers, and
        scheduled delivery via RFC 3339 timestamps or natural language.
      tags:
        - Emails
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/BasicEmailRequest'
      responses:
        '200':
          description: Email accepted for delivery
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/SendResponse'
        '400':
          description: Validation error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '401':
          description: Authentication failed
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
  /emails/template:
    post:
      operationId: sendTemplatedEmail
      summary: Send a templated email
      description: >-
        Send an email using a template defined in the Maileroo dashboard.
        Template variables are merged via the template_data object.
      tags:
        - Emails
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/TemplatedEmailRequest'
      responses:
        '200':
          description: Email accepted for delivery
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/SendResponse'
        '400':
          description: Validation error
        '401':
          description: Authentication failed
  /emails/bulk:
    post:
      operationId: sendBulkEmails
      summary: Send bulk emails
      description: >-
        Send up to 500 emails in a single request, each with its own
        recipient and merge variables. Common subject and body content
        applies across messages, with per-message overrides.
      tags:
        - Emails
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/BulkEmailRequest'
      responses:
        '200':
          description: Emails accepted for delivery
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/BulkSendResponse'
        '400':
          description: Validation error
        '401':
          description: Authentication failed
  /emails/scheduled:
    get:
      operationId: listScheduledEmails
      summary: List scheduled emails
      description: >-
        Retrieve a paginated list of emails scheduled for future delivery.
        Filterable by sending domain when using app-scoped API keys.
      tags:
        - Scheduled
      parameters:
        - name: domain
          in: query
          required: false
          description: Sender domain (required for app-scoped API keys)
          schema:
            type: string
        - name: page
          in: query
          schema:
            type: integer
            default: 1
        - name: per_page
          in: query
          schema:
            type: integer
            default: 10
            maximum: 100
      responses:
        '200':
          description: Paginated list of scheduled emails
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ScheduledEmailList'
        '401':
          description: Authentication failed
  /emails/scheduled/{reference_id}:
    delete:
      operationId: deleteScheduledEmail
      summary: Delete a scheduled email
      description: >-
        Cancel a scheduled email by its reference ID. This action is
        irreversible.
      tags:
        - Scheduled
      parameters:
        - name: reference_id
          in: path
          required: true
          description: The 24-character hex reference ID of the scheduled email
          schema:
            type: string
      responses:
        '200':
          description: Scheduled email cancelled
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/SimpleResponse'
        '404':
          description: Scheduled email not found
components:
  securitySchemes:
    ApiKeyAuth:
      type: apiKey
      in: header
      name: X-Api-Key
    BearerAuth:
      type: http
      scheme: bearer
  schemas:
    EmailObject:
      type: object
      required: [address]
      properties:
        address:
          type: string
          format: email
        display_name:
          type: string
    Attachment:
      type: object
      required: [file_name, content]
      properties:
        file_name:
          type: string
        content:
          type: string
          description: Base64-encoded file content
        content_type:
          type: string
        inline:
          type: boolean
        content_id:
          type: string
    BasicEmailRequest:
      type: object
      required: [from, to, subject]
      properties:
        from:
          $ref: '#/components/schemas/EmailObject'
        to:
          oneOf:
            - $ref: '#/components/schemas/EmailObject'
            - type: array
              items:
                $ref: '#/components/schemas/EmailObject'
        cc:
          type: array
          items:
            $ref: '#/components/schemas/EmailObject'
        bcc:
          type: array
          items:
            $ref: '#/components/schemas/EmailObject'
        reply_to:
          type: array
          items:
            $ref: '#/components/schemas/EmailObject'
        subject:
          type: string
          maxLength: 255
        html:
          type: string
        plain:
          type: string
        tracking:
          type: boolean
        tags:
          type: object
          additionalProperties:
            type: string
        headers:
          type: object
          additionalProperties:
            type: string
        attachments:
          type: array
          items:
            $ref: '#/components/schemas/Attachment'
        scheduled_at:
          type: string
          description: RFC 3339 timestamp or natural language schedule
        reference_id:
          type: string
          description: 24-character hex ID; auto-generated if omitted
    TemplatedEmailRequest:
      allOf:
        - $ref: '#/components/schemas/BasicEmailRequest'
        - type: object
          required: [template_id]
          properties:
            template_id:
              type: integer
            template_data:
              type: object
              additionalProperties: true
    BulkMessage:
      type: object
      required: [from, to]
      properties:
        from:
          $ref: '#/components/schemas/EmailObject'
        to:
          $ref: '#/components/schemas/EmailObject'
        template_data:
          type: object
        reference_id:
          type: string
    BulkEmailRequest:
      type: object
      required: [subject, messages]
      properties:
        subject:
          type: string
          maxLength: 255
        messages:
          type: array
          maxItems: 500
          items:
            $ref: '#/components/schemas/BulkMessage'
        template_id:
          type: integer
        html:
          type: string
        plain:
          type: string
        tracking:
          type: boolean
        tags:
          type: object
        headers:
          type: object
        attachments:
          type: array
          items:
            $ref: '#/components/schemas/Attachment'
    SendResponse:
      type: object
      properties:
        success:
          type: boolean
        message:
          type: string
        data:
          type: object
          properties:
            reference_id:
              type: string
    BulkSendResponse:
      type: object
      properties:
        success:
          type: boolean
        message:
          type: string
        data:
          type: object
          properties:
            reference_ids:
              type: array
              items:
                type: string
    SimpleResponse:
      type: object
      properties:
        success:
          type: boolean
        message:
          type: string
        data:
          nullable: true
    ScheduledEmailRecord:
      type: object
      properties:
        reference_id:
          type: string
        from:
          $ref: '#/components/schemas/EmailObject'
        to:
          type: array
          items:
            $ref: '#/components/schemas/EmailObject'
        subject:
          type: string
        scheduled_at:
          type: string
          format: date-time
        tags:
          type: object
        headers:
          type: object
    ScheduledEmailList:
      type: object
      properties:
        success:
          type: boolean
        message:
          type: string
        data:
          type: object
          properties:
            page:
              type: integer
            per_page:
              type: integer
            total_count:
              type: integer
            total_pages:
              type: integer
            results:
              type: array
              items:
                $ref: '#/components/schemas/ScheduledEmailRecord'
    ErrorResponse:
      type: object
      properties:
        success:
          type: boolean
        message:
          type: string
        data:
          nullable: true