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OpenAPI Specification

openapi: 3.2.0
info:
  title: Loops OpenAPI Spec API key Transactional emails API
  description: This is the OpenAPI Spec for the [Loops API](https://loops.so/docs/api).
  version: 1.8.0
servers:
- url: https://app.loops.so/api/v1
tags:
- name: Transactional emails
  description: Send and view transactional emails
paths:
  /transactional:
    post:
      tags:
      - Transactional emails
      summary: Send a transactional email
      description: Send a transactional email to a contact.<br>Please [email us](mailto:help@loops.so) to enable attachments on your account before using them with the API.
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/TransactionalRequest'
        required: true
      parameters:
      - in: header
        name: Idempotency-Key
        description: Include a unique ID for this request (maximum 100 characters) to avoid duplicate emails. [More info](https://loops.so/docs/api-reference/send-transactional-email#param-idempotency-key)
        schema:
          type: string
          maxLength: 100
      responses:
        '200':
          description: Successful send.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/TransactionalSuccessResponse'
        '400':
          description: Bad request (e.g. transactional email is not published).
          content:
            application/json:
              schema:
                oneOf:
                - $ref: '#/components/schemas/TransactionalFailureResponse'
                - $ref: '#/components/schemas/TransactionalFailure2Response'
                - $ref: '#/components/schemas/TransactionalFailure3Response'
                - $ref: '#/components/schemas/TransactionalFailure4Response'
                - $ref: '#/components/schemas/TransactionalFailure5Response'
        '404':
          description: Transactional email not found.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/TransactionalFailure3Response'
        '405':
          description: Wrong HTTP request method.
        '409':
          description: Idempotency key has been used.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/IdempotencyKeyFailureResponse'
      security:
      - apiKey: []
    get:
      tags:
      - Transactional emails
      summary: List transactional emails
      description: Get a list of published transactional emails.
      parameters:
      - name: perPage
        in: query
        required: false
        description: How many results to return in each request. Must be between 10 and 50. Default is 20.
        schema:
          type: string
      - name: cursor
        in: query
        required: false
        description: A cursor, to return a specific page of results. Cursors can be found from the `pagination.nextCursor` value in each response.
        schema:
          type: string
      responses:
        '200':
          description: Successful.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ListTransactionalsResponse'
        '405':
          description: Wrong HTTP request method.
      security:
      - apiKey: []
components:
  schemas:
    TransactionalSuccessResponse:
      type: object
      properties:
        success:
          type: boolean
          examples:
          - true
      required:
      - success
    TransactionalFailure4Response:
      type: object
      properties:
        success:
          type: boolean
          examples:
          - false
        message:
          type: string
        error:
          type: object
          properties:
            path:
              type: string
            reason:
              type: string
      required:
      - success
      - message
      - error
    TransactionalFailure5Response:
      type: object
      properties:
        success:
          type: boolean
          examples:
          - false
        message:
          type: string
        error:
          type: object
          properties:
            path:
              type: string
            message:
              type: string
        transactionalId:
          type: string
      required:
      - success
      - message
      - error
      - transactionalId
    TransactionalFailure2Response:
      type: object
      properties:
        success:
          type: boolean
          examples:
          - false
        message:
          type: string
        path:
          type: string
      required:
      - success
      - message
      - path
    TransactionalFailureResponse:
      type: object
      properties:
        success:
          type: boolean
          examples:
          - false
        message:
          type: string
      required:
      - success
      - message
    IdempotencyKeyFailureResponse:
      type: object
      properties:
        success:
          type: boolean
          examples:
          - false
        message:
          type: string
      required:
      - success
      - message
    TransactionalFailure3Response:
      type: object
      properties:
        success:
          type: boolean
          examples:
          - false
        message:
          type: string
        error:
          type: object
          properties:
            path:
              type: string
            message:
              type: string
      required:
      - success
      - message
      - error
    TransactionalEmail:
      type: object
      properties:
        id:
          type: string
        name:
          type: string
        lastUpdated:
          type: string
        dataVariables:
          type: array
      examples:
      - id: cll42l54f20i1la0lfooe3z12
        name: Sign up confirmation
        lastUpdated: 2025-02-02 02:56:28.845000+00:00
        dataVariables:
        - confirmationUrl
      required:
      - id
      - name
      - lastUpdated
      - dataVariables
    TransactionalRequest:
      type: object
      required:
      - email
      - transactionalId
      properties:
        email:
          type: string
        transactionalId:
          type: string
          description: The ID of the transactional email to send.
        addToAudience:
          type: boolean
          description: If `true`, a contact will be created in your audience using the `email` value (if a matching contact doesn't already exist).
        dataVariables:
          type: object
          description: An object containing contact data as defined by the data variables added to the transactional email template.
          examples:
          - name: Chris
            passwordResetLink: https://example.com/reset-password
        attachments:
          type: array
          description: A list containing file objects to be sent along with an email message.
          items:
            type: object
            required:
            - filename
            - contentType
            - data
            properties:
              filename:
                type: string
                description: The name of the file, shown in email clients.
              contentType:
                type: string
                description: The MIME type of the file.
              data:
                type: string
                description: The base64-encoded content of the file.
    ListTransactionalsResponse:
      type: object
      properties:
        pagination:
          type: object
          properties:
            totalResults:
              type: number
            returnedResults:
              type: number
            perPage:
              type: number
            totalPages:
              type: number
            nextCursor:
              type:
              - string
              - 'null'
            nextPage:
              type:
              - string
              - 'null'
        data:
          type: array
          items:
            $ref: '#/components/schemas/TransactionalEmail'
  securitySchemes:
    apiKey:
      type: http
      scheme: bearer