FormLoom
Start free

Best contact form APIs

Verified June 2026

If you want to POST submissions from code (not just a browser form), the API surface matters: a predictable JSON response, a typed SDK, and rate limiting.

  1. 1

    FormLoom

    our pick

    Simple POST API, typed SDK, public API + key management, rate limited.

  2. 2

    Formspree

    Documented API with integrations.

    Formspree alternative
  3. 3

    Basin

    Developer-oriented API with webhooks on free.

    Basin alternative

How we ranked these

  • JSON response shape
  • Typed SDK
  • Rate limiting
  • Webhooks

FAQ

Yes — the FormLoom endpoint accepts JSON or multipart from anywhere; the SDK works in Node too.

Try the top pick free

Start free — no card
Best contact form APIs (2026) — honest, ranked comparison · FormLoom