HeyForm Submissions API

openapi: 3.0.3
info:
  title: HeyForm Auth Submissions API
  description: HeyForm is an open-source conversational form builder providing REST and GraphQL endpoints for managing forms, submissions, workspaces, integrations, and webhooks. The primary data API uses GraphQL; this document covers the publicly accessible REST endpoints discovered in the open-source codebase.
  version: 1.0.0
  contact:
    name: HeyForm Support
    url: https://docs.heyform.net
  license:
    name: AGPL-3.0
    url: https://github.com/heyform/heyform/blob/main/LICENSE
servers:
- url: https://api.heyform.net
  description: HeyForm Cloud API
- url: http://localhost:8000
  description: Self-hosted HeyForm instance (default port)
tags:
- name: Submissions
  description: Export form submission data
paths:
  /api/export/submissions:
    get:
      operationId: exportSubmissions
      summary: Export form submissions as CSV
      description: Downloads all submissions for a given form as a CSV file. Requires authentication and the caller must own or have access to the specified form.
      tags:
      - Submissions
      security:
      - cookieAuth: []
      parameters:
      - name: formId
        in: query
        required: true
        description: The unique identifier of the form whose submissions to export.
        schema:
          type: string
        example: abc123xyz
      responses:
        '200':
          description: CSV file containing all form submissions
          content:
            text/csv:
              schema:
                type: string
                format: binary
          headers:
            Content-Disposition:
              schema:
                type: string
              example: attachment; filename="My%20Form-2026-06-13.csv"
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
components:
  responses:
    BadRequest:
      description: Bad request — invalid input or business logic violation
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
          example:
            statusCode: 400
            message: The form does not exist
            error: Bad Request
    Unauthorized:
      description: Authentication required
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
          example:
            statusCode: 401
            message: Unauthorized
            error: Unauthorized
  schemas:
    Error:
      type: object
      properties:
        statusCode:
          type: integer
        message:
          type: string
        error:
          type: string
  securitySchemes:
    cookieAuth:
      type: apiKey
      in: cookie
      name: heyform_sid
      description: Session cookie set by the login mutation or OAuth callback. All authenticated GraphQL mutations and the CSV export endpoint require this cookie.
externalDocs:
  description: HeyForm Documentation
  url: https://docs.heyform.net