
API integration testing that remembers what breaks
Most API tests stop at 200 OK. FetchSandbox lets developers and AI agents verify what happens next—webhooks, retries, state changes, async workflows, and failure scenarios. It reproduces the real bug, proves the fix, and remembers what breaks—so your agent catches it before production. Connect via MCP to Cursor, Claude Code, Windsurf, VS Code, and Codex. Explore 60+ APIs—Stripe, GitHub, Clerk, Resend, Twilio, Descope, OpenAI—without burning real API quota or waiting on staging.
FetchSandbox is an API integration testing tool that allows developers and AI agents to verify post-200 OK scenarios, including webhooks and failure conditions. It connects with multiple platforms and supports over 60 APIs, enabling testing without consuming real API quotas.