Best form backend APIs (2026)

The ranking

All 9, in order

1. 01

   Furrow Forms

   best for: Forms as infrastructure — full lifecycle, free tier[ that’s us ]

   Create, update, and archive clients, websites, and forms over REST or MCP (both share the same domain logic, so there is no capability drift). Accounts themselves can be registered via API. All creates are idempotent by slug, bootstrap_site provisions an entire website’s forms in one call, and every webhook delivery is HMAC-signed, retried with backoff, and logged.

   • [+]Full CRUD: clients, sites, forms, webhooks — REST and MCP
   • [+]Account registration via API (unique)
   • [+]Idempotent bulk provisioning (bootstrap_site)
   • [+]Signed, retried, logged, testable webhooks
   • [+]All of it on the free tier

   • [−]No native integrations — webhooks are the integration story
   • [−]No CSV export API (read via API/dashboard)

   pricing: $0 for 100 subs/mo · $199/yr flat per workspace

2. 02

   Formspark

   best for: Classic REST CRUD with one-time pricingfull comparison →

   The most complete traditional REST API here: POST, PATCH, and DELETE on forms (including notification and spam settings) plus workspace CRUD, behind simple Bearer auth. No MCP, no account API, and webhooks are unsigned with no retries — automation can build forms but cannot verify delivery.

   • [+]Full form CRUD including updates
   • [+]Workspace management endpoints
   • [+]One-time $25/50k pricing

   • [−]Unsigned, non-retried webhooks
   • [−]No MCP or account registration
   • [−]Free tier: 250 submissions total

   pricing: Free 250 total · $25 one-time per 50k

3. 03

   FormBackend

   best for: REST + hosted MCP combinedfull comparison →

   REST endpoints cover create, list, and delete (no update); the hosted MCP fills the gap with update_form_settings and adds OAuth-scoped access. API access starts on the $14/mo Freelancer plan. Webhook signing and retry behavior are undocumented.

   • [+]REST + MCP together
   • [+]OAuth 2.1 scopes
   • [+]Native uploads alongside the API

   • [−]No REST update; API from $14/mo
   • [−]Delivery guarantees undocumented
   • [−]Forms capped until $50/mo

   pricing: Free 1 form/50 subs · API from $14/mo

4. 04

   Basin

   best for: Established API on a mature productfull comparison →

   A real management API and CLI for creating and configuring forms — gated to the ~$24/mo Growth plan. Mature product around it: integrations, uploads, and the Lead Agent AI for submissions.

   • [+]Management API + CLI
   • [+]Mature platform and integrations

   • [−]API costs ~$290/yr
   • [−]No MCP; per-form configuration

   pricing: Free 50/mo · Growth ~$24/mo for API

5. 05

   Formcarry

   best for: Fire-and-forget provisioning scriptsfull comparison →

   PUT to create, DELETE to remove — and that is the whole management story. No list, read, or update endpoints for forms; a separate API reads submissions. Workable for scripts that provision once and never reconfigure.

   • [+]Create and delete via API
   • [+]Cheap tiers with team roles

   • [−]No read or update for forms
   • [−]Webhooks undocumented

   pricing: Free 1 form/50 subs · Starter $6/mo

6. 06

   Splitforms

   best for: MCP-only creation on a budgetfull comparison →

   The REST API is submit + read-submissions only; form creation lives exclusively in its free local MCP server, and nothing can be updated or deleted programmatically. Signed webhooks (paid) are never retried.

   • [+]Form creation via free MCP
   • [+]Generous free tier (500/mo)

   • [−]No REST management API
   • [−]Create-only; no update/delete
   • [−]No webhook retries

   pricing: Free 500/mo · Pro $5/mo intro

7. 07

   Formspree

   best for: Reading submissions at scalefull comparison →

   The Submissions API (Professional, $30/mo) reads and exports submission data cleanly — but no endpoint creates, updates, or deletes a form. The legacy CLI deploys formspree.json config, needing a dashboard-obtained deploy key.

   • [+]Clean submissions read API
   • [+]CLI config-as-code (legacy but functional)

   • [−]No form management endpoints at any tier
   • [−]API starts at $30/mo

   pricing: Free 50/mo · API from $30/mo

8. 08

   Web3Forms

   best for: Read-only submission accessfull comparison →

   The Pro API is explicitly read-only — list forms, list submissions — with no POST, PUT, or DELETE anywhere. Server-side submission itself requires a paid plan plus IP allowlisting.

   • [+]Simple Bearer-auth read API

   • [−]Read-only by design
   • [−]Pro-gated; server-side use restricted

   pricing: Free 250/mo · Pro ~$13–15/mo

9. 09

   Forminit / Netlify Forms

   best for: (Neither offers form management via API)full comparison →

   Forminit’s Pro API submits forms and lists submissions; Netlify Forms are created by HTML parsing at deploy time with a read-only submissions API. Both are fine products — neither offers a management API.

   • [+]Forminit: excellent signed + retried webhooks
   • [+]Netlify: zero-config on its own platform

   • [−]No programmatic form creation or configuration in either

   pricing: Forminit Pro $19/mo · Netlify included with plans