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OpenAPI Specification
openapi: 3.2.0
info:
title: HeyForm Auth Images 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: Images
description: Image proxy and resizing
paths:
/api/image:
get:
operationId: proxyImage
summary: Proxy and resize an image
description: Fetches a remote image from an allowed host, optionally resizes it, and returns the result with long-lived cache headers. Useful for embedding external images in forms without leaking user IP addresses.
tags:
- Images
parameters:
- name: url
in: query
required: true
description: The URL of the remote image to proxy.
schema:
type: string
format: uri
example: https://images.unsplash.com/photo-abc123
- name: w
in: query
required: false
description: Target width in pixels.
schema:
type: integer
minimum: 1
example: 800
- name: h
in: query
required: false
description: Target height in pixels.
schema:
type: integer
minimum: 1
example: 600
responses:
'200':
description: Image content
content:
image/*:
schema:
type: string
format: binary
headers:
Cache-Control:
schema:
type: string
example: public, max-age=315360000, must-revalidate
'204':
description: Empty response when the image cannot be fetched or is invalid.
'400':
$ref: '#/components/responses/BadRequest'
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
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