ToolVet
80trust / 100

Toolfit Lite

by ToolFit by YourAITools in Onchain & crypto

x402 APIPassing, checked 1 h ago

AI agent tool schema linter API (MCP and function calling). Check an agent tool list (tools array or public remote MCP URL): grade A-F, estimated tokens per tool and total, compatible yes/no for OpenAI, Anthropic, Gemini, Bedrock and MCP, the top confusable tool pairs, basic poisoning count and a pin (set_id) for later diffs. Bad input or an unreachable URL: never charged.

GET
https://api.youraitools.co/toolfit/v1/lite
Price
$0.003
per call in USDC
Uptime
100%
last 30 days
Response time
27 ms
255 ms slowest 5%
Last check
Passed
1 h ago, next any minute now

Run a free test callHow to call it

Reliability

All checks passedSome failedAll failedNot checked

Status and outage history · Atom feed · Watch with other listings

How to call it

GET https://api.youraitools.co/toolfit/v1/lite

Each call costs $0.003 in USDC on Polygon, paid with the request over x402.

Run a free test callOne unpaid request, the way an agent sends it. You see the payment challenge it gets back. Nothing is charged.

Example request

From the listing.

GET https://api.youraitools.co/toolfit/v1/lite?url=https%3A%2F%2Fapi.youraitools.co%2Fmcp%2Fhub

Parameters

ParameterTypeRequiredDescription
providersarray of stringNoProviders to check (default openai, anthropic, gemini, bedrock, mcp; add openai_strict for Structured Outputs strict mode). GET: comma list.
toolsarray of objectNoTool definitions: MCP tools/list entries, OpenAI {type:"function",function:{...}}, Anthropic {name,description,input_schema}, Gemini functionDeclarations or Bedrock toolSpec. Max 500.
urlstringNoPublic remote MCP server URL (Streamable HTTP, https), e.g. https://api.youraitools.co/mcp/hub. ToolFit only lists its tools.

Example response

The provider's example. We can't check it without paying.

Example response, 34 lines
{
  "confusable": {
    "count": 5,
    "high": 1
  },
  "grade": "D",
  "pin": {
    "set_id": "ts_0123456789abcdef0123456789abcdef"
  },
  "poisoning": {
    "findings": 0,
    "high": 0
  },
  "providers": {
    "anthropic": {
      "compatible": true,
      "errors": 0
    },
    "gemini": {
      "compatible": false,
      "errors": 9
    },
    "openai": {
      "compatible": false,
      "errors": 8
    }
  },
  "score": 62,
  "tokens": {
    "avg": 374,
    "total": 11585
  },
  "tools": 31
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.003.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://api.youraitools.co/toolfit/v1/lite?url=https%3A%2F%2Fapi.youraitools.co%2Fmcp%2Fhub'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - 'https://api.youraitools.co/toolfit/v1/lite?url=https%3A%2F%2Fapi.youraitools.co%2Fmcp%2Fhub' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode
JavaScript: pay and call
// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPayment, x402Client } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

// Pays at most $0.003 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.003" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.003 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.youraitools.co%2Ftoolfit%2Fv1%2Flite
const res = await pay("https://api.youraitools.co/toolfit/v1/lite?url=https%3A%2F%2Fapi.youraitools.co%2Fmcp%2Fhub");
console.log(res.status, await res.text());
Python: pay and call
# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $0.003 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.003"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://api.youraitools.co/toolfit/v1/lite?url=https%3A%2F%2Fapi.youraitools.co%2Fmcp%2Fhub")
    print(res.status_code, res.text)

Security scan

No findings

We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.

Recent checks

WhenResultHTTPTimePrice
1 h agoPassed40250 ms$0.003
9 h agoPassed40231 ms$0.003
17 h agoPassed402114 ms$0.003
24 h agoPassed40224 ms$0.003
32 h agoPassed402120 ms$0.003
Show 9 older checks
39 h agoPassed402255 ms$0.003
47 h agoPassed40220 ms$0.003
2 days agoPassed40273 ms$0.003
3 days agoPassed40227 ms$0.003
3 days agoPassed40224 ms$0.003
3 days agoPassed40217 ms$0.003
3 days agoPassed40213 ms$0.003
4 days agoPassed40238 ms$0.003
4 days agoPassed40213 ms$0.003