Api Endpoint

402xAgent Check

402xAgent: probe of a public URL (blocks private, loopback and link-local addresses on every redirect hop) for an x402 PAYMENT-REQUIRED challenge. Never pays the target. $0.02 USDC on Base after 5 free checks per UTC day.

Open interactive test console

Offering

Provider: api.402xagent.com
Method: GET
Offering type: Api Endpoint
Transport type: http
Category: Other
Delivery: Not provided
Pricing model: Not provided
x402 version: 2

Endpoint context

URL: https://api.402xagent.com/v1/products/endpoint-spot-check
MIME type: application/json
First seen: 2026-10-25T21:33:42.825Z
Last seen: 2026-11-02T04:04:56.479Z
Tags: X402, pre-payment-check, payment-verification, signed-receipts, infra, 402xagent, probe, catalog

Website

Payment pricing

x402 payment terms are the authoritative price for calling this endpoint.

Payment option 1: 0.02 USDC
Atomic price: 20000 · Network: eip155:8453 · Asset: USDC · Scheme: exact

Raw x402 terms

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "20000",
    "payTo": "0x37cfCC8a29e9ff9458902B29E31E42dc7B718674"
  }
]

Observed health

Status: Healthy
Latest latency: 107 ms
Average latency: 225 ms
HTTP status: 402
Last checked: 2026-11-02T04:04:56.474Z
Reachability: 100% over 5 checks

Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.

Input schema

{
  "type": "object",
  "properties": {
    "type": {
      "type": "string",
      "const": "http"
    },
    "method": {
      "type": "string",
      "enum": [
        "GET",
        "POST"
      ]
    },
    "queryParams": {
      "type": "object",
      "properties": {
        "url": {
          "type": "string"
        },
        "task": {
          "type": "string"
        },
        "claimed_price": {
          "type": "string"
        },
        "method": {
          "type": "string",
          "enum": [
            "GET",
            "POST"
          ]
        },
        "pay_to": {
          "type": "string"
        },
        "network": {
          "type": "string"
        },
        "client": {
          "type": "string"
        },
        "ref": {
          "type": "string"
        },
        "mode": {
          "type": "string",
          "enum": [
            "live",
            "dry-run"
          ]
        }
      }
    },
    "headers": {
      "type": "object",
      "additionalProperties": {
        "type": "string"
      }
    }
  },
  "required": [
    "type",
    "method"
  ],
  "additionalProperties": false
}

Output schema

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "input"
  ],
  "properties": {
    "input": {
      "type": "object",
      "required": [
        "type",
        "method"
      ],
      "properties": {
        "type": {
          "type": "string",
          "const": "http"
        },
        "method": {
          "enum": [
            "GET",
            "POST"
          ],
          "type": "string"
        },
        "headers": {
          "type": "object",
          "additionalProperties": {
            "type": "string"
          }
        },
        "queryParams": {
          "type": "object",
          "properties": {
            "ref": {
              "type": "string"
            },
            "url": {
              "type": "string"
            },
            "mode": {
              "enum": [
                "live",
                "dry-run"
              ],
              "type": "string"
            },
            "task": {
              "type": "string"
            },
            "client": {
              "type": "string"
            },
            "method": {
              "enum": [
                "GET",
                "POST"
              ],
              "type": "string"
            },
            "pay_to": {
              "type": "string"
            },
            "network": {
              "type": "string"
            },
            "claimed_price": {
              "type": "string"
            }
          }
        }
      },
      "additionalProperties": false
    },
    "output": {
      "type": "object",
      "required": [
        "type"
      ],
      "properties": {
        "docs": {
          "type": "string"
        },
        "type": {
          "type": "string"
        }
      }
    }
  }
}