# LupaPlaza URL Probe

> LupaPlaza URL Probe is a paid API for AI agents from lupaplaza.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-10).

Performs a one-shot HTTP 402 check on a public URL to determine if it requires payment and is listed in the LupaPlaza plaza index.

## Facts

- Endpoint: GET https://lupaplaza.com/api/probe?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-10
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/lupaplaza-url-probe-235cf78b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_eEg2r8JjNSo5Ak0dNlbIe

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 lupaplaza-url-probe-235cf78b
```

Example prompt: Can you probe https://lupapago.com/api/fee?psp=mobbex to check if it returns a 402 payment-required response and tell me whether it's listed in the LupaPlaza plaza index along with its payment details?

## When to prefer this

Use this endpoint when you need to quickly determine if a specific public URL is an HTTP 402 payment-gated API, especially when you want to confirm its presence in the LupaPlaza plaza index and retrieve structured payment metadata (asset, amount, network, pay-to address). Prefer it over manual HTTP inspection when you need structured, machine-readable output about x402-compliant endpoints.

## Known failure modes

- URL is unreachable or times out — probe may return an error or non-402 status
- URL requires authentication before returning 402 — probe may see a different status code
- URL is valid but not 402-gated — is_402 returns false and in_plaza returns false
- Malformed URL input causes probe to fail with validation error
- Target server rate-limits or blocks the probe request

## How this service works

Índice de liquidación LatAm: qué endpoint puede pagar un agente ahora (mainnet, 402 live) y llevarse los datos. No es LupaRiel (rieles) ni LupaPago (fees).

## Output

Returns a JSON object containing the probed URL, kind ('plaza_probe'), HTTP status code, whether the endpoint returned 402 (is_402), whether it is listed in the LupaPlaza plaza (in_plaza), the plaza_id, price details including asset contract address, amount, pay-to wallet address, and network, along with the product name, ruleset version, and a disclaimer.

## 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"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "POST"
     ],
     "type": "string"
    },
    "headers": {
     "type": "object",
     "additionalProperties": {
      "type": "string"
     }
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "url": {
       "type": "string",
       "description": "URL pública http(s) a sondear (402 / PAYMENT-REQUIRED)."
      }
     },
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "url": "https://lupapago.com/api/fee?psp=mobbex",
  "kind": "plaza_probe",
  "price": {
   "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
   "amount": "10000",
   "pay_to": "0x6fc99c8a5334e00f6fce854700959930a3c62dbc",
   "network": "eip155:8453"
  },
  "is_402": true,
  "product": "LupaPlaza",
  "ruleset": "plaza-probe-v1",
  "in_plaza": true,
  "plaza_id": "lupapago-fee-mobbex",
  "disclaimer": "Probe puntual LupaPlaza; no es auditoría completa.",
  "http_status": 402
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/lupaplaza-url-probe-235cf78b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from lupaplaza.com](https://www.zero.xyz/host/lupaplaza.com/llms.txt)