ToolVet
77trust / 100

Preflight

by pitcrew-api.appin60.com in Onchain & crypto

x402 APIPassing, checked 56 min ago

Check any x402 paid endpoint before paying it: does it return a valid 402 challenge, which networks/tokens/prices it accepts (decoded to USD), whether amounts are valid atomic units, payTo sanity, testnet-only offers, missing Bazaar input schema, redirects and latency. Returns a verdict (payable / payable with warnings / broken / unreachable) and the exact problems. Useful for agents choosing between paid APIs and for sellers debugging why x402scan or the CDP Bazaar skipped their route.

GET
https://pitcrew-api.appin60.com/x402/preflight
Price
$0.005
per call in USDC
Uptime
100%
last 30 days
Response time
494 ms
695 ms slowest 5%
Last check
Passed
56 min 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://pitcrew-api.appin60.com/x402/preflight

Each call costs $0.005 in USDC on Base, 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://pitcrew-api.appin60.com/x402/preflight?method=GET&url=https%3A%2F%2Fcontractlens-api.appin60.com%2Fscan

Parameters

ParameterTypeRequiredDescription
bodystringNoOptional JSON body to send with a POST probe (use the route's own example input)
methodstringNoHTTP method to probe (default GET) One of: GET, POST.
urlstringYesFull URL of the x402 endpoint

Example response

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

{
  "offers": [
    {
      "network": "eip155:8453",
      "priceUsd": 0.01,
      "token": "USDC"
    }
  ],
  "problems": [],
  "verdict": "payable",
  "warnings": []
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.005.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://pitcrew-api.appin60.com/x402/preflight?method=GET&url=https%3A%2F%2Fcontractlens-api.appin60.com%2Fscan'

# 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://pitcrew-api.appin60.com/x402/preflight?method=GET&url=https%3A%2F%2Fcontractlens-api.appin60.com%2Fscan' \
  | 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 $0.005 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.005" });
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 $0.005 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fpitcrew-api.appin60.com%2Fx402%2Fpreflight
const res = await pay("https://pitcrew-api.appin60.com/x402/preflight?method=GET&url=https%3A%2F%2Fcontractlens-api.appin60.com%2Fscan");
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 $0.005 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.005"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://pitcrew-api.appin60.com/x402/preflight?method=GET&url=https%3A%2F%2Fcontractlens-api.appin60.com%2Fscan")
    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
56 min agoPassed402549 ms$0.005
6 h agoPassed402508 ms$0.005
10 h agoPassed402542 ms$0.005
15 h agoPassed402391 ms$0.005
19 h agoPassed402498 ms$0.005
Show 10 older checks
24 h agoPassed402290 ms$0.005
28 h agoPassed402351 ms$0.005
32 h agoPassed402398 ms$0.005
36 h agoPassed402342 ms$0.005
40 h agoPassed402611 ms$0.005
45 h agoPassed402300 ms$0.005
2 days agoPassed402344 ms$0.005
2 days agoPassed402358 ms$0.005
2 days agoPassed402652 ms$0.005
3 days agoPassed402494 ms$0.005