API Playground
Test verified public APIs in your browser via a security-hardened proxy — only 2,602 allowlisted APIs can be reached. Built for single-endpoint APIs and large surfaces like Plaid or Slack.
Endpoints
5
Bin
Request
proxy validates path
extendsclass.com· SSRF-safe proxyResponse
Send a request to see the real response here — status, timing, and body.
The playground routes through a security-hardened proxy. Only allowlisted hosts are reachable. Try ExtendsClass JSON Storage to start.