Try it right now — no account needed

Pick a demo function, hit Execute, and see a real FunctionFly execution. No signup. No credit card. Just results.

input.jsonEdit the JSON, then run.

What you just did

The Demo Playground calls real fx://functionfly/<name> functions through your browser. The same API surface, the same manifest verification, the same signed receipts — just with a free weekly quota so anyone can try before signing up.

Try these in the playground

web-scraper — fetch a URL and extract structured content
text-summarizer — condense long-form text into a TL;DR
currency-converter — convert between currencies with live rates
All 100+ curated functions — in the marketplace (free tier: 105 calls / week)

Go from demo to production

The same fx:// endpoint you just hit is what your agents call — programmatically, with rate-limit headers, signed receipts, and the full Trust API surface. Switch from the demo to a real API key in two clicks.

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