ToolSchema Forge

Checks one LLM tool/function definition against the schema rules of OpenAI (incl. strict mode), Anthropic, Gemini and MCP without changing it. Returns a compatible true/false flag per provider and every problem with its JSON pointer path, so a tool can be fixed before an API call is rejected. Deterministic, no LLM.

Open endpoint ↗

Price per call: $0.005
Chain: Base
Method: POST
Paid calls · 30 days: 0

Call it from code

This API is run by its own provider and paid directly through x402. We list it so you can find it; we don't route or hold the payment.

import { x402Client, wrapFetchWithPayment } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";

const client = new x402Client();
registerExactEvmScheme(client, { signer: agentAccount });

const pay = wrapFetchWithPayment(fetch, client);
const res = await pay("https://toolschema-forge.toolschemaforge.workers.dev/v1/tool-schema/lint", { method: "POST" });
console.log(await res.json());

https://toolschema-forge.toolschemaforge.workers.dev/v1/tool-schema/lint