ToolVet
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Price Check

by stall-row in Other

x402 APIPassing, checked 8 min ago

Pricing comps for an x402 listing, read live from the CDP Bazaar public catalog: how many resources match your keywords, their price distribution, the closest comparables, and a recommended listing price with its rationale. Use this when you operate an x402 route and are setting or changing its price.

POST
https://stall-row-production.up.railway.app/v1/price-check
Price
$0.05
per call in USDC
Uptime
100%
last 30 days
Response time
756 ms
1.0 s slowest 5%
Last check
Passed
8 min ago, next in 22 min

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://stall-row-production.up.railway.app/v1/price-check

Each call costs $0.05 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://stall-row-production.up.railway.app/v1/price-check
content-type: application/json

{
  "keywords": "token risk verdict"
}

Parameters

ParameterTypeRequiredDescription
descriptionstringNo
keywordsstringYes

Example response

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

{
  "catalog_status": "ok",
  "comparables": [
    {
      "description": "Token verdict",
      "price_units": 20000,
      "price_usd": 0.02,
      "resource": "https://example.com/v1/verdict"
    }
  ],
  "keywords": "token risk verdict",
  "matches_found": 3,
  "price_distribution": {
    "max_usd": 0.05,
    "median_usd": 0.02,
    "min_usd": 0.01,
    "p90_usd": 0.05
  },
  "rationale": "Median of 3 cataloged match(es).",
  "recommended_price_usd": 0.02
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.05.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://stall-row-production.up.railway.app/v1/price-check' \
  -H 'content-type: application/json' \
  --data-raw '{"keywords":"token risk verdict"}'

# 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://stall-row-production.up.railway.app/v1/price-check' \
  -H 'content-type: application/json' \
  --data-raw '{"keywords":"token risk verdict"}' \
  | 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 $0.05 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.05" });
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 $0.05 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fstall-row-production.up.railway.app%2Fv1%2Fprice-check&method=POST
const res = await pay("https://stall-row-production.up.railway.app/v1/price-check", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "keywords": "token risk verdict"
  }),
});
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 $0.05 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.05"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://stall-row-production.up.railway.app/v1/price-check",
        json={
            "keywords": "token risk verdict",
        },
    )
    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
8 min agoPassed402561 ms$0.05
6 h agoPassed402756 ms$0.05
11 h agoPassed4021.0 s$0.05