FetchSandbox

FetchSandbox is a sandbox environment that lets developers and AI coding agents test API integrations without using real APIs, verifying workflow behavior directly from the IDE. It provides pre-configured mock integrations for Stripe, GitHub, OpenAI, Twilio, and 60+ other services, and can simulate webhook delivery, retries, and out-of-order events. FetchSandbox integrates with Cursor, VS Code, Claude Code, and Windsurf, letting teams validate workflow state and integration behavior before production while reproducing bugs without consuming real API quota. It also supports failure simulation, including 4xx/5xx errors, rate limiting, and async edge cases. The product launched as the #3 Product of the Day on Product Hunt and offers a free tier alongside paid plans detailed on its pricing page.