FetchSandbox
API integration testing that remembers what breaks
What this is
Lets developers and AI coding agents test API integrations beyond the first response — webhooks, retries, async flows, failures — against sandboxed mock versions of 60+ real APIs, connected via MCP.
Our one-line summary — not the founder’s tagline.
- How it works
- Lets developers and AI coding agents test API integrations beyond the first response — webhooks, retries, state changes, async workflows and failure scenarios — against sandboxed versions of 60+ real APIs (Stripe, GitHub, Clerk, Resend, Twilio, Descope, OpenAI) via MCP.
- What's different
- Reproduces the real bug and remembers what breaks so agents catch it again before production, rather than stopping at a 200 OK check.
- Best for
- Developers and AI coding agents (via Cursor, Claude Code, Windsurf, VS Code, Codex) who need to test failure paths without burning real API quota.
What we measured
Nobody else publishes this — it comes from knocking on the door every day.
- Watched by us
- 15 days
- Last checked
- 9d ago
Where it shows up
Every group here is a page of its own — each one checked daily.
The numbersIs it still shipping, is it overpriced, where did it land — and what the price is built from.
League price & chart
No money. No seat. It goes on your record — and in 28 days reality settles it.
Calls are closed while we rebuild accounts. You can still read every one of them.
Dev. Launched 15d ago on Product Hunt, picking up 398 votes. Today, it's been quiet for 15 days and the price has started to bleed.
Already bleeding a little every day, and it accelerates the longer it stays quiet.
We check this site every day, ourselves. A founder can post “still working on it” — a claim like that doesn't price. What we price is what we can verify from the outside: evidence, not announcements. The real question isn't “will this be huge?” — it's “will they still be moving in four weeks?”
The market viewHow this launch is priced and ranked in our league — the investor side of the page.
ranked by the reality anchor, not the market price
It launched on Product Hunt with 398 votes.
No matter how much money goes in. There is no pump here — you can't make yourself right by buying more. The line only moves on things that actually happened: an award, revenue that grew, a new platform, code that shipped — or silence.
En eski 4 hareket bu listede yok — toplam 16 olay var. A launch that goes quiet eases down a little at a time — never a cliff you could have run from the night before.
Daily tracking just started for this launch — the first point is on the board. A second reading lands with tomorrow's run, and the curve builds from there.
How the launch is moving on its own board, day by day — the crowd's attention.
A flat line is normal: votes stop within a day or two of launch, on every board. What's unusual — and what actually counts — is a launch that keeps pulling votes long after its day is over.
About
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.
Where it launched
1 platform| Platform | Votes | Counts toward price | Link |
|---|---|---|---|
| Product Hunt | 398 | sets the price | ↗ |
The board it did best on sets the price. Every other board only adds to it if the launch also placed high on that board too — because just showing up somewhere isn't an achievement. Listing on twelve directories is free; placing well on them isn't.
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