# x402 Pay-Precheck: Ranked x402 Endpoint Recommender

> x402 Pay-Precheck: Ranked x402 Endpoint Recommender is a paid API for AI agents from api.moneytools.dev, paid per call via x402, $0.004/call, status unknown (last checked 2026-11-04).

Finds and ranks the best x402 paid API endpoints for a given task, with live liveness/latency probes and 402-terms + OFAC pre-checks across PayAI, Ultravioleta, and Dexter catalogs

## Facts

- Endpoint: GET https://api.moneytools.dev/v1/recommend?utm_source=zero.xyz
- Price: $0.004/call
- Payment: x402
- Status: unknown
- Last checked: 2026-11-04
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-pay-precheck-ranked-x402-endpoint-recommender-2ac83abc
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_bIo96912sWW7mHs9vZqAa

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-pay-precheck-ranked-x402-endpoint-recommender-2ac83abc
```

Example prompt: Search across PayAI, Ultravioleta, and Dexter x402 catalogs and find me the top 3 live, pre-checked endpoints that can summarize text, priced under $0.02 on Base — rank them by relevance and latency.

## When to prefer this

Use this endpoint when an AI agent needs to discover and vet x402-protocol paid API endpoints before committing to a payment. It is the right choice when you want relevance ranking plus live health checks and payment-term validation in a single call, rather than manually querying PayAI, Ultravioleta, or Dexter separately. Prefer it over static catalog lookups when endpoint liveness and OFAC compliance matter to your workflow.

## Known failure modes

- No matching endpoints found for the given task description
- All candidate endpoints fail liveness probe — results returned with live:false
- maxPrice filter too restrictive — no endpoints under the specified price
- OFAC screen flags a payTo address — precheck verdict returns a non-ok status
- Invalid or missing task parameter — 400 error
- x402 payment not settled before request — 402 response returned
- Network filter yields no results for specified chain

## How this service works

Factual directory of x402 pay-per-call services run by MoneyTools for AI agents, plus referral/affiliate links we hold. Contains referral links.

## Output

A ranked JSON array of up to 3 x402 endpoint results, each containing the endpoint URL, a relevance score, liveness probe data (live boolean, latency in ms, uptime ratio), a precheck verdict (e.g. 'ok' or failure reason), and the price in USD.

## 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"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "task": {
       "type": "string"
      },
      "limit": {
       "type": "string"
      },
      "network": {
       "type": "string"
      },
      "maxPrice": {
       "type": "string"
      }
     }
    }
   }
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "json"
    },
    "example": {
     "type": "object",
     "properties": {
      "results": {
       "type": "array",
       "items": {
        "type": "object",
        "properties": {
         "url": {
          "type": "string"
         },
         "score": {
          "type": "number"
         },
         "liveness": {
          "type": "object",
          "properties": {
           "live": {
            "type": "boolean"
           },
           "latencyMs": {
            "type": "number"
           },
           "uptimeRatio": {
            "type": "number"
           }
          }
         },
         "precheck": {
          "type": "object",
          "properties": {
           "verdict": {
            "type": "string"
           }
          }
         },
         "priceUsd": {
          "type": "number"
         }
        }
       }
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "results": [
   {
    "url": "https://…",
    "score": 4.2,
    "liveness": {
     "live": true,
     "latencyMs": 420,
     "uptimeRatio": 1
    },
    "precheck": {
     "verdict": "ok"
    },
    "priceUsd": 0.01
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-pay-precheck-ranked-x402-endpoint-recommender-2ac83abc/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.moneytools.dev](https://www.zero.xyz/host/api.moneytools.dev/llms.txt)