# x402 Endpoint Inspector (Vextorium)

> x402 Endpoint Inspector (Vextorium) is a paid API for AI agents from api.vextorium.com, paid per call via x402, $0.004/call, status unknown (last checked 2026-10-02).

Inspects any x402 payment-gated endpoint before paying — returning price, asset safety, payee address, contract status, authorization timeout, Bazaar metadata, and risk alerts with a verdict.

## Facts

- Endpoint: POST https://api.vextorium.com/x402-inspector-pago?utm_source=zero.xyz
- Price: $0.004/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-endpoint-inspector-vextorium-72445903
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_IWdzK0CZWipChSGRgrvt-

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability x402-endpoint-inspector-vextorium-72445903 -d '<json body>'
```

Example prompt: Before I pay, inspect this x402 endpoint for me — https://some-api.example.com/paid-route — tell me the price in USD, what asset and network it uses, whether the payment address is a contract, and flag any risks.

## When to prefer this

Use this endpoint whenever an agent needs to evaluate an x402 payment-gated API before committing funds — especially when the endpoint is unknown, found via a marketplace, or when you want to verify asset authenticity, payee legitimacy, and risk posture without actually transacting. Ideal for agentic workflows that must gate payment decisions on safety checks.

## Known failure modes

- Target URL is not an x402 endpoint — es_x402 returns false with no payment options
- Target URL is unreachable or times out — error response with no data
- Endpoint returns malformed x402 headers — partial data with warnings
- Asset is not official USDC — flagged in activo_es_usdc_oficial field as false
- Payee address is a smart contract — flagged with pagar_a_es_contrato true and a risk alert

## How this service works

Check any x402 endpoint before paying, without paying: price in USD per network, asset (flags anything that is not official USDC), pay-to address and whether it is a contract, authorization timeout, Bazaar metadata, and risk alerts with a clear verdict.

## Output

A structured JSON response containing: whether the URL is a valid x402 endpoint, the x402 protocol version, all payment options (network, asset, price in USD, raw amount, payee address, whether payee is a contract, whether asset is official USDC, authorization timeout in seconds), a Bazaar metadata flag, a description, a list of risk alerts each with a severity level and message, and a final plain-language verdict.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "required": [
      "url"
     ],
     "properties": {
      "url": {
       "type": "string",
       "description": "Full URL of the x402 endpoint"
      },
      "cuerpo": {
       "type": "object",
       "description": "Optional JSON body to send (some endpoints price by input)"
      },
      "metodo": {
       "enum": [
        "POST",
        "GET"
       ],
       "type": "string",
       "description": "HTTP method (POST default, or GET)"
      }
     }
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": [
      "object",
      "null"
     ],
     "properties": {
      "url": {
       "type": [
        "string",
        "null"
       ]
      },
      "nota": {
       "type": [
        "string",
        "null"
       ]
      },
      "alertas": {
       "type": [
        "array",
        "null"
       ],
       "items": {
        "type": [
         "null",
         "object"
        ],
        "properties": {
         "nivel": {
          "type": [
           "string",
           "null"
          ]
         },
         "mensaje": {
          "type": [
           "string",
           "null"
          ]
         }
        }
       }
      },
      "es_x402": {
       "type": [
        "boolean",
        "null"
       ]
      },
      "veredicto": {
       "type": [
        "string",
        "null"
       ]
      },
      "descripcion": {
       "type": [
        "string",
        "null"
       ]
      },
      "ficha_bazaar": {
       "type": [
        "boolean",
        "null"
       ]
      },
      "version_x402": {
       "type": [
        "number",
        "null"
       ]
      },
      "tipo_respuesta": {
       "type": [
        "string",
        "null"
       ]
      },
      "opciones_de_pago": {
       "type": [
        "array",
        "null"
       ],
     
… (truncated)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-endpoint-inspector-vextorium-72445903/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.vextorium.com](https://www.zero.xyz/host/api.vextorium.com/llms.txt)