Guide
6 Best Form Builders with an API (2026)
For developers, the form builder itself matters less than what you can do with it programmatically — creating forms from code, pulling responses into your own systems, or wiring an AI agent directly to it. We compared six tools on REST API coverage, webhooks, SDKs and — increasingly — MCP support for AI agents. YeetForm leads for anyone building on top of AI tooling; the rest offer solid, more traditional developer surfaces.
| Tool | Best for | Free plan | Starting price |
|---|---|---|---|
| YeetForm | REST API, JS SDK, webhooks and an MCP server | Yes | From €19/mo or €99 once |
| Jotform | Mature, broad REST API with many endpoints | Yes | Free plan available |
| Typeform | Well-documented API, paid plans required | Yes | Paid |
| Fillout | API plus many native integrations | Yes | Free plan available |
| Tally | Webhooks and a lightweight API | Yes | Free plan available |
| Formbricks | Open-source, full API access if self-hosted | Yes | Free plan available |
The picks
YeetForm
YeetForm ships a REST API (/api/v1) with API keys, an OpenAPI spec, a JS SDK for embeds, signed HMAC webhooks, and an MCP server so an AI agent like Claude Code or Cursor can create and read forms directly.
The API surface is newer and narrower than Jotform's — if you need dozens of specialized endpoints built up over a decade, Jotform's API has more of them.
Jotform
Jotform's API is one of the most mature in the space, covering forms, submissions, reports, and account management across a large surface area.
Documentation is thorough but dense, and some endpoints require navigating Jotform's own concepts (like 'sheets') rather than plain REST resources.
Typeform
Typeform's API and webhooks are well-documented and reliable for pulling responses into your own systems in real time.
Meaningful API access sits behind paid plans, and there's no equivalent to an MCP server for AI agents yet.
Fillout
Fillout pairs a straightforward API with a large number of native, no-code integrations, so many use cases don't need custom code at all.
The API itself is less extensive than Jotform's or YeetForm's for advanced programmatic form creation.
Tally
Tally offers webhooks and a lightweight API adequate for pulling submissions into another system without much ceremony.
It's not built for heavy programmatic form creation — you're mostly reading data out, not building forms in via API.
Formbricks
Being open-source, Formbricks gives you full access to its API and database if you self-host it — nothing is gated behind a plan.
That same openness means you own the operational burden: hosting, upgrades and uptime are on you, not a vendor.
How we chose
We looked at whether the API covers real developer needs — creating and reading forms and responses programmatically, not just exporting a CSV — plus webhook reliability, SDK availability, and whether the tool supports the newer MCP standard for AI agents.