ToolVet
75trust / 100

Package

by factstamp.agentrails.workers.dev in Developer tools

x402 APIPassing, checked 3 h ago

Check a dependency before installing it. Give a package and, optionally, a version with its ecosystem (npm, PyPI, crates.io); the answer says whether that exact version exists, whether it is yanked or deprecated, and every advisory OSV lists against it. A version that was never published returns not_found with the real versions nearest to it. Verdicts: verified, advisory, yanked, not_found, unknown.

POST
https://factstamp.agentrails.workers.dev/package
Price
$0.02
per call in USDC
Uptime
100%
last 30 days
Response time
367 ms
665 ms slowest 5%
Last check
Passed
3 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

POST https://factstamp.agentrails.workers.dev/package

Each call costs $0.02 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.

POST https://factstamp.agentrails.workers.dev/package
content-type: application/json

{
  "ecosystem": "npm",
  "package": "[email protected]"
}

Example response

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

Example response, 30 lines
{
  "advisories": [
    {
      "id": "GHSA-qw6h-vgh9-j6wx"
    },
    {
      "id": "GHSA-rv95-896h-c2vc"
    }
  ],
  "deprecated": null,
  "detail": "2 advisory record(s) published against [email protected].",
  "ecosystem": "npm",
  "latest": "5.2.1",
  "name": "express",
  "published_at": "2022-10-08T20:14:32.495Z",
  "query": "[email protected]",
  "sources": [
    {
      "http_status": 200,
      "name": "npm registry"
    },
    {
      "http_status": 200,
      "name": "OSV"
    }
  ],
  "verdict": "advisory",
  "version": "4.18.2",
  "yanked": false
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.02.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://factstamp.agentrails.workers.dev/package' \
  -H 'content-type: application/json' \
  --data-raw '{"ecosystem":"npm","package":"[email protected]"}'

# 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 - -X POST 'https://factstamp.agentrails.workers.dev/package' \
  -H 'content-type: application/json' \
  --data-raw '{"ecosystem":"npm","package":"[email protected]"}' \
  | 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 $0.02 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.02" });
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 $0.02 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Ffactstamp.agentrails.workers.dev%2Fpackage&method=POST
const res = await pay("https://factstamp.agentrails.workers.dev/package", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "ecosystem": "npm",
    "package": "[email protected]"
  }),
});
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 $0.02 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.02"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://factstamp.agentrails.workers.dev/package",
        json={
            "ecosystem": "npm",
            "package": "[email protected]",
        },
    )
    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

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3 h agoPassed402239 ms$0.02
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