Contractr — Design API Contracts, Spin Up Mock Servers Instantly
The fastest contract-first API development platform. Define API contracts, generate instant mock servers, and share with your team — in under 2 minutes.
Why Contractr?
- Instant Mock API Servers — Spin up live mock endpoints the moment your contract is saved. No Docker, no CLI, no config.
- Contract-First API Design — Define request/response schemas, methods, paths, and status codes in a visual editor.
- Share with Clients — Password-protected share links with expiry. Clients see auto-generated Swagger docs.
- Request Logs & Analytics — Track every request hitting your mock server with 30-day retention.
- Export to OpenAPI, Postman, cURL — One-click export in industry-standard formats.
- Version Control — Publish versions, detect breaking changes, and rollback with a single click.
- Comments & @Mentions — Collaborate on endpoints with your team.
Pricing
- Free — $0/forever. Mock servers with 5-min TTL, up to 3 endpoints per contract.
- Solo — $19/month. Always-on mock servers, unlimited endpoints, share links, request logs, comments.
- Agency — $49/month (coming soon). Team seats up to 20, full RBAC, 90-day logs.
Sign up free — No credit card required.