HeyForm Forms API

openapi: 3.0.3
info:
  title: HeyForm Auth Forms 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: Forms
  description: Form rendering (public endpoint)
paths:
  /form/{formId}:
    get:
      operationId: renderForm
      summary: Render a public form
      description: Serves the HTML shell for a published form. This is the embeddable public-facing form page. The form data itself is loaded dynamically via the GraphQL endpoint.
      tags:
      - Forms
      parameters:
      - name: formId
        in: path
        required: true
        description: The unique identifier of the form to render.
        schema:
          type: string
        example: abc123xyz
      responses:
        '200':
          description: HTML page containing the rendered form
          content:
            text/html:
              schema:
                type: string
components:
  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