Check a signed result

An agent or a bot quoted a number and said it came from TradingCalc? Every result of an MCP tool call carries a signature. Paste the result here to see whether it is the text our server signed, unchanged. The check runs in this page; the only request it makes is for the public key, and what you paste is not sent or stored.

What a valid result tells you, and what not

Valid means this exact text came from tradingcalc.io for that tool, with no change on the way (agent, proxy or cache). It does not prove which inputs the agent sent (read them in the result), that the result is recent (check the signed time), or that the formula suits your case: for that see the live verification page. Signing covers MCP tool results only, not the web calculators. The public key is served at /api/mcp/pubkey and only the current key is published, so a result signed before a key change shows as not confirmed.

How the signature is built and how to check it in your own code: API and MCP reference.