ToolVet
78trust / 100

Listings

by Toll402 in Security & trust

x402 APIPassing, checked 5 min ago

Buy a verified listing for YOUR x402 endpoint, remote MCP server or A2A agent — paid by the agent in USDC, no humans. We probe it live (402 shape / MCP handshake / agent card); if it passes, it is listed for 30 days in the Toll402 catalog, llms.txt, agent card and landing, and ranked higher in /v1/find and the /v1/do router. basic $1 · featured $5 (top of results). Charged only when verification passes. Free quote: POST /v1/listings/quote.

POST https://toll402.dev/v1/listings

Last 30 days

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Status and outage history · Atom feed

Uptime
100%
Response time
217 ms typical, 306 ms slowest 5%
Last check
5 min ago
Next check
in 27 min

How to call it

POST https://toll402.dev/v1/listings

Each call costs $1.00 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://toll402.dev/v1/listings
content-type: application/json

{
  "kind": "x402",
  "tags": [
    "finance"
  ],
  "tier": "basic",
  "url": "https://api.example.com/v1/quote"
}

Parameters

ParameterTypeRequiredDescription
contactstringNoEmail or URL where we can reach you (not published)
descriptionstringNo
kindstringYesx402 = HTTP endpoint that answers 402; mcp = remote MCP server (Streamable HTTP); agent = A2A agent card URL One of: x402, mcp, agent.
namestringNo
ownerstringNoYour wallet (0x) for attribution and future creator payouts
tagsarray of stringNo Default: [].
tierstringNobasic $1/30 days · featured $5/30 days (top of results, landing spotlight) One of: basic, featured. Default: "basic".
urlstring (uri)YesThe endpoint / MCP URL / agent-card URL

Example response

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

{
  "listed": true,
  "listing": {
    "id": "l/abc123",
    "kind": "x402",
    "listedUntil": "2026-10-09T00:00:00Z",
    "tier": "basic"
  }
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $1.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://toll402.dev/v1/listings' \
  -H 'content-type: application/json' \
  --data-raw '{"kind":"x402","tags":["finance"],"tier":"basic","url":"https://api.example.com/v1/quote"}'

# 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://toll402.dev/v1/listings' \
  -H 'content-type: application/json' \
  --data-raw '{"kind":"x402","tags":["finance"],"tier":"basic","url":"https://api.example.com/v1/quote"}' \
  | 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 $1 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$1" });
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 $1 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Ftoll402.dev%2Fv1%2Flistings&method=POST
const res = await pay("https://toll402.dev/v1/listings", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "kind": "x402",
    "tags": [
      "finance"
    ],
    "tier": "basic",
    "url": "https://api.example.com/v1/quote"
  }),
});
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 $1 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$1"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://toll402.dev/v1/listings",
        json={
            "kind": "x402",
            "tags": [
                "finance",
            ],
            "tier": "basic",
            "url": "https://api.example.com/v1/quote",
        },
    )
    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
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