Pick a tool, fill the auto-generated form, and run it against the real gateway — the same endpoint your agent calls. Nothing here is a mockup.
Honest note: calculators run free and unauthenticated right here. Agent-native tools (browser, memory, media, markets…) are x402-metered — they answer with a payment challenge, so grab a free key (500 calls/month, no card) and call them from your agent.
Select a tool on the left to build its form and run it.