FetchSandbox tests AI-built integrations before they go live
FetchSandbox is a test environment for checking payment and messaging written by AI agents before they reach a live system. It was created because code can pass ordinary tests but still fail when a real webhook arrives.
Common problems include processing the same event twice, handling repeat requests unsafely, and reading old during a retry. The service runs the full process with realistic workflows and webhooks, and it can trigger failure conditions on demand.
It also creates a public results link that teams can attach to a as evidence that the survived the tests. FetchSandbox reached third place on on its first day.
Key points
- It tests realistic webhooks and complete workflows before release.
- It can reproduce duplicate events, retries, and failures caused by old .
- Teams receive a public test-results link for use in .
- It is aimed at involving outside APIs, payments, or communications.
- Its main value is reducing failures and rework, not directly lowering token use.