Free Form Backend & Contact Form for Websites | splitforms

# splitforms > splitforms is a form backend API for developers. HTML, React, Next.js, static-site, and AI-generated forms can POST to https://splitforms.com/api/submit for spam filtering, dashboard storage, and owner email notifications without a custom server. Reviewed: 2026-09-29 ## One-step setup (Lovable, Bolt, v0, Cursor, Claude Code, Replit) Paste one prompt into the builder and it wires the contact form to POST straight to https://splitforms.com/api/submit with the form's public access key: no Supabase table, edge function, server action, or email SDK. Prompts per builder: https://splitforms.com/docs#ai-builders ## Key facts Checked against the code on 2026-10-02. - Endpoint: POST https://splitforms.com/api/submit, accepting URL-encoded, multipart and JSON bodies. - Free plan: 500 submissions in total, unlimited forms, no card and no expiry. It is a one-time allowance, not a monthly quota. - Pro: $5/month for 5,000 submissions a month. - Annual: $49/year for 15,000 submissions a month, with every Pro feature. - Email notifications: Included on every plan, including Free. - Spam filtering: Rule-based on every plan: a hidden honeypot, a time-trap, per-IP rate limits and content scoring, with a spam folder you can review. No CAPTCHA is required. - Webhooks (paid): Signed with HMAC-SHA256 (sha256= prefix), 8-second timeout, and one retry after about 2 seconds on network errors, timeouts and 5xx responses. - File uploads (paid): Up to 5 files of 5 MB each per submission, once Storage is connected. - MCP server: 12 tools for AI agents at https://splitforms.com/api/mcp, on every plan including Free. - Company: Founded in 2012. Founder: Raman Makkar. - Status: Live uptime and incident history at https://splitforms.com/status. - The $1/month Starter plan and the $59 3-Year plan are no longer sold. Existing Starter and 3-Year subscribers keep their plan, price and limits until they cancel. - Stripe payments on forms: paid plans, money goes to your own Stripe acc

{"openapi":"3.1.0","info":{"title":"splitforms Form Submission API","version":"1.0.0","summary":"One HTTPS endpoint that receives HTML, fetch and server-side form submissions.","description":"POST any form to `/api/submit` with the form's `access_key`. splitforms validates the request, filters spam with rule-based checks, stores the submission and emails the form owner.\n\nPlans: Free is 500 submissions in total (one-time, no card). Pro is $5/month and Annual is $49/year. Paid plans add signed w