Use when an agent needs x402 endpoint verify

What it does

Use when an agent needs x402 endpoint verify. Returns Verify and lint a third-party x402 endpoint: probes the URL (SSRF-guarded), confirms it answers with a well-formed HTTP 402 challenge, and reports protocol-conformance findings — accepts[] completeness, facilitator price floor on Base, PAYMENT-REQUIRED header/body consistency, timeout sanity. $0.02.

Tags: x402 · endpoint · verify · verification · bazaar

Call contract

Method

POST

Input

json

Output

json

Last paid call

2026-10-11

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

{
  "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
}

Use with an agent

1. Discover. Agents find this listing with GET https://bazaar.saylorinnovations.com/discovery/search?query=…, the MCP tool search_resources, or /discovery/resources.
2. Inspect. Fetch /resources/26005.json for the price and payment options.
3. Pay. Call GET https://api.oblique.markets/api/v1/paid/x402-endpoint-verify. The provider answers 402 with its payment requirements. An x402 client signs one of the options below and retries with PAYMENT-SIGNATURE.
4. Execute. The provider returns 200 with the data. Agent Bazaar is not in the request path and never sees your payment.

For humans

You don't need an account or an API key; you need a wallet holding a small amount of USDC on Base, Solana, and an x402-capable client (see the examples below). Call the endpoint unpaid first to see exactly what it asks for.

Pricing & payment

Price

$0.02 / request

Protocol

x402 v2

Auth

No account or API key. Pay per request.

Networks

Base, Solana

Demand

4 calls · 3 unique payers in 30d (public x402 Bazaar data)

x402 payment requirements

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x970007590aCC5C938cd51345B17AF51B1B40D3Ab",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "20000",
    "amountUsd": 0.02,
    "maxTimeoutSeconds": 60
  },
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "payTo": "GYyTRmt317JafPHXPnM54Fsvsma5GnS9wm6qGMqaykdS",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "amount": "20000",
    "amountUsd": 0.02,
    "maxTimeoutSeconds": 60
  }
]

Schemas

{
  "properties": {
    "accepts_count": {
      "type": "integer"
    },
    "checked_at": {
      "type": "string"
    },
    "findings": {
      "items": {
        "type": "string"
      },
      "type": "array"
    },
    "http_status": {
      "type": "integer"
    },
    "is_x402": {
      "type": "boolean"
    },
    "method": {
      "type": "string"
    },
    "reachable": {
      "type": "boolean"
    },
    "url": {
      "type": "string"
    },
    "x402_version": {
      "type": "integer"
    }
  },
  "type": "object"
}

{
  "accepts_count": 0,
  "checked_at": "string",
  "findings": [
    "string"
  ],
  "http_status": 0,
  "is_x402": true,
  "method": "string",
  "reachable": true,
  "url": "string",
  "x402_version": 0
}

Examples

curl -X POST 'https://api.oblique.markets/api/v1/paid/x402-endpoint-verify' -H 'Content-Type: application/json' --data '{"url":"The https URL of the x402 endpoint to verify"}'
# -> 402 Payment Required; read PAYMENT-REQUIRED
# retry the identical request with PAYMENT-SIGNATURE

const res = await fetch("https://api.oblique.markets/api/v1/paid/x402-endpoint-verify", {
  "method": "POST",
  "headers": {
    "content-type": "application/json"
  },
  "body": "{\"url\":\"The https URL of the x402 endpoint to verify\"}"
});
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

import httpx
import json
res = httpx.request("POST", "https://api.oblique.markets/api/v1/paid/x402-endpoint-verify", json=json.loads("{\"url\":\"The https URL of the x402 endpoint to verify\"}"))
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header

Details

Provider

api.oblique.markets

Endpoint

https://api.oblique.markets/api/v1/paid/x402-endpoint-verify

Machine-readable

/resources/26005.json