Viktor.comAn AI coworker that actually does the work
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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.
This is the 2nd launch from FetchSandbox. View more
FetchSandbox MCP
Launched this week
Your agent's integration fix passes CI. The data is still wrong. FetchSandbox MCP reproduces the real failure on your code, fixes it, and proves the fix held. A receipt, not a vibe. 70+ API sandboxes. One config block in Cursor or Claude Code.
Free
Launch Team / Built With
FetchSandbox
@tehreem_fatima5 pact is great for locking down the contract between a known consumer and provider in CI. fetchsandbox is less about "did the schema match" and more about running the full lifecycle: stateful CRUD, webhook delivery, auth failures, rate limits, all from inside the agent's IDE session. for an LLM agent the rapid iteration piece matters a lot, it can reproduce a specific failure, fix the code, and get a proof receipt back rather than just validating shape.
This has good potential as with QA surface as well. Do you see FetchSandbox being used for e2e QA for dev, test, prod envs.
Netlify
Testing and verifying AI integration fixes in a sandbox before deploying saves so much headache. Congrats on shipping!
FetchSandbox
@thisiskp_ thanks man!!..Yeah exactly, same bug, very different discovery method. Finding it before deploy means you fix it in your editor. Finding it after means a customer tells you about it at some inconvenient hour. That's the whole thing we're trying to shift.
FetchSandbox
@thisiskp_ Thanks! Honestly that pain is exactly why we built this. Catching a bad config or an edge case token error in sandbox vs in prod is a completely different experience.. one costs you sleep, the other costs you 10 minutes.
Product Hunt Wrapped 2025
Best of luck in the launch day!
FetchSandbox
@alexcloudstar thank you so much, means a lot on launch day!
FetchSandbox
@alexcloudstar thank you, really appreciate the support