ToolVet
83trust / 100

Seller Payability

by x402 seller payability check in Markets & finance

x402 APIPassing, checked 2 h ago

Buy one call from an x402 seller endpoint right now and report exactly what happened: the unpaid call's status, the 402 decoded (accepts, chains, payTo, asset, price), whether the accept's EIP-712 domain name matches the token it names (the defect that silently makes a whole catalog unpayable), whether a stock client's signed payment was accepted, the settlement receipt and transaction, a slice of the response body, and the time each leg took. Ends in plain-English flags, never a score.

POST https://agent402.tools/api/seller-payability

Last 30 days

All checks passedSome failedAll failedNot checked
Uptime
100%
Response time
185 ms typical, 185 ms slowest 5%
Last check
2 h ago
Next check
any minute now

How to call it

# See the payment challenge (nothing is charged)
curl -i -X POST "https://agent402.tools/api/seller-payability" \
  -H "content-type: application/json" \
  -d '{"body":{"text":"hello"},"method":"POST","url":"https://agent402.tools/api/hash"}'
import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { ExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

const client = new x402Client().register(
  "eip155:8453",
  new ExactEvmScheme(privateKeyToAccount(process.env.AGENT_KEY)),
);
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? Preflight it first for $0.005:
// GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fagent402.tools%2Fapi%2Fseller-payability
const res = await pay("https://agent402.tools/api/seller-payability", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({"body":{"text":"hello"},"method":"POST","url":"https://agent402.tools/api/hash"}),
});
console.log(await res.json());

Example input

{
  "body": {
    "text": "hello"
  },
  "method": "POST",
  "url": "https://agent402.tools/api/hash"
}

Example output

{
  "challenge": {
    "accepts": [],
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "networks": [
      "eip155:8453"
    ],
    "payTo": "0x…",
    "priceUsd": 0.01,
    "pricedFrom": "eip155:8453",
    "readable": true
  },
  "checkedAt": "2026-09-11T02:00:00.000Z",
  "domainFindings": [
    {
      "advertisedName": "USD Coin",
      "chain": "Base",
      "expectedName": "USD Coin",
      "network": "eip155:8453",
      "verdict": "matches"
    }
  ],
  "flags": [
    "a stock buyer can pay this endpoint and get a result: nothing to fix"
  ],
  "method": "POST",
  "payable": true,
  "payment": {
    "attempted": true,
    "error": null,
    "ms": 2400,
    "receipt": {
      "network": "eip155:8453",
      "payer": "0x…",
      "success": true,
      "transaction": "0x…"
    },
    "settled": true,
    "status": 200
  },
  "responseSlice": "{\"summary\":\"…\"}",
  "unpaidCall": {
    "bodySlice": "{}",
    "contentType": "application/json",
    "error": null,
    "ms": 180,
    "status": 402
  },
  "url": "https://agent402.tools/api/hash"
}

Security scan

  • No findings. We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.

Recent checks

WhenResultHTTPTimePrice
2 h agoPassed402185 ms$0.1
7 h agoPassed402250 ms$0.1