ToolVet
75trust / 100

Bulk

by factstamp.agentrails.workers.dev in Developer tools

x402 APIPassing, checked 2 h ago

Check a whole bibliography or dependency manifest in one round trip, before you rely on the list: up to 12 items at a flat US$0.12 — 1 cent an item, against 2 cents for the same lookups one at a time. Every item is answered by the same door that answers a single call, so the verdicts cannot disagree. Pay per call here, or redeem a prepaid pack code (one answer-pack credit per three items, up to 25 items on that rail).

POST
https://factstamp.agentrails.workers.dev/bulk
Price
$0.12
per call in USDC
Uptime
100%
last 30 days
Response time
393 ms
617 ms slowest 5%
Last check
Passed
2 h ago, next any minute now

Run a free test callHow to call it

Reliability

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

How to call it

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

Each call costs $0.12 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/bulk
content-type: application/json

{
  "citations": [
    "10.1038/nature12373",
    "10.1016/s0140-6736(97)11096-0"
  ],
  "packages": [
    "[email protected]"
  ]
}

Example response

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

{
  "answered": 3,
  "by_verdict": {
    "retracted": 1,
    "verified": 2
  },
  "items": 3,
  "paid_with": {
    "list_price_usd": 0.12,
    "rail": "x402_pay_per_call",
    "settlement": {
      "success": true
    }
  },
  "receipt_url": "https://factstamp.agentrails.workers.dev/r/c41e77b2aa90d613",
  "results": [
    {
      "input": "10.1038/nature12373",
      "tool": "verify_citation",
      "verdict": "verified"
    }
  ],
  "unreadable": 0
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.12.

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/bulk' \
  -H 'content-type: application/json' \
  --data-raw '{"citations":["10.1038/nature12373","10.1016/s0140-6736(97)11096-0"],"packages":["[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/bulk' \
  -H 'content-type: application/json' \
  --data-raw '{"citations":["10.1038/nature12373","10.1016/s0140-6736(97)11096-0"],"packages":["[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 $0.12 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.12" });
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 $0.12 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Ffactstamp.agentrails.workers.dev%2Fbulk&method=POST
const res = await pay("https://factstamp.agentrails.workers.dev/bulk", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "citations": [
      "10.1038/nature12373",
      "10.1016/s0140-6736(97)11096-0"
    ],
    "packages": [
      "[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 $0.12 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.12"})
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/bulk",
        json={
            "citations": [
                "10.1038/nature12373",
                "10.1016/s0140-6736(97)11096-0",
            ],
            "packages": [
                "[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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2 h agoPassed402221 ms$0.12
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25 h agoPassed402507 ms$0.12
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