It lets code make forms and read the answers. You POST a form, get a public link, and later GET the responses as JSON or CSV.

How do I authenticate?

Send your API key as a Bearer token in the Authorization header. Keys start with afk_. We show the full key once and store only a hash.

Not yet. It is plain JSON over HTTPS. Use fetch, requests or curl. An OpenAPI 3.1 file is at /openapi.json.

Forms API: make forms and read answers with plain HTTP

I want forms from code. POST a title and fields. Get a link. GET the answers as JSON or CSV. One key.

Make a form

bash

curl -X POST https://aiformapi.com/v1/forms \
  -H "Authorization: Bearer $AIFORMAPI_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "title": "Customer feedback",
    "fields": [
      {"id": "name", "label": "Your name", "type": "short_text"},
      {"id": "score", "label": "How was it?", "type": "rating", "required": true},
      {"id": "comment", "label": "Anything to add?", "type": "long_text"}
    ],
    "settings": {"agent_fill": true}
  }'

You get 201 with id, slug, public_url, status and created_at. Share public_url. Read the answers later:

bash

curl "https://aiformapi.com/v1/forms/FORM_ID/responses?format=csv" \
  -H "Authorization: Bearer $AIFORMAPI_KEY" -o responses.csv

The Quickstart has JavaScript and Python.

Endpoints

Base URL: https://aiformapi.com/v1. Full list: openapi.json.

Forms (key): POST /v1/forms, GET /v1/forms, GET, PATCH, DELETE /v1/forms/{id}, POST /v1/forms/{id}/close and /reopen.
Answers (key): GET /v1/forms/{id}/responses, GET /v1/forms/{id}/responses/{response_id}.
Webhooks and usage (key): POST, DELETE /v1/forms/{id}/webhooks, GET /v1/usage.
Public (no key): POST /v1/signup, GET /v1/public/forms/{slug}, POST /v1/public/forms/{slug}/responses, POST /v1/public/forms/{slug}/fill-tokens.
Agents (fill token): GET, POST /v1/fill/{token}.

More: Forms and fields, Responses, Webhooks, Agent fill, MCP, Errors. 11 field types. Up to 50 fields.

Bring your own front end

Skip our page. Read the schema, draw the fields, then post the answers to the public endpoints above. No key needed. Limits are per IP address. When Turnstile is on, send turnstile_token. Want no code? Use the embed script.

Free plan limits

Limit	Free plan
Open forms	3
Responses a month	100
API requests per key	30 a minute, 1,000 a day
Request body	64 KB

See rate limits and pricing. No SDKs yet. Make a client from /openapi.json.

Other forms APIs

Read on 2026-10-30. Limits differ in kind. Do not compare numbers one to one.

	AI Form API	Google Forms API	Jotform API	Tally API
Credential	One API key		API key as `apiKey` query parameter or `APIKEY` header	Bearer token
Rate limit	30 a minute, 1,000 a day (free)	Per minute per project: 975 reads, 450 for `responses.list`, 375 writes; no daily cap	1,000 a day on Starter (free), 10,000 on Bronze	100 a minute
Webhooks	Yes, signed	Watches that expire after 7 days	Yes, through the API	Yes; the docs prefer them to polling

They have more features: logic, uploads, payments. Need those? Use them. Want a short API, one key and an agent hand-off? Use ours. Compare Google Forms, Jotform and Tally.

Sources: Google Forms API, Google limits, Jotform, Tally.