X402 Endpoint Verify

Last 30 days

Uptime

100%

Response time

40 ms typical, 40 ms slowest 5%

Last check

55 min ago

Next check

any minute now

How to call it

# See the payment challenge (nothing is charged)
curl -i -X POST "https://api.oblique.markets/api/v1/paid/x402-endpoint-verify" \
  -H "content-type: application/json" \
  -d '{"url":"The https URL of the x402 endpoint to verify"}'

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%2Fapi.oblique.markets%2Fapi%2Fv1%2Fpaid%2Fx402-endpoint-verify
const res = await pay("https://api.oblique.markets/api/v1/paid/x402-endpoint-verify", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({"url":"The https URL of the x402 endpoint to verify"}),
});
console.log(await res.json());

Example input

{
  "url": "The https URL of the x402 endpoint to verify"
}

Example output

{
  "accepts_count": 2,
  "checked_at": "2026-08-10T12:00:00.000Z",
  "findings": [
    "accepts[1] amount 500 is below the CDP facilitator floor of 1079 atomic on eip155:8453 — unsellable through the main facilitator",
    "PAYMENT-REQUIRED header is absent — x402 v2 clients that read the header instead of the body will not see the challenge"
  ],
  "http_status": 402,
  "is_x402": true,
  "method": "GET",
  "reachable": true,
  "url": "https://api.example-seller.com/api/v1/paid/quote",
  "x402_version": 2
}

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