# x402 Radar Service Search

> x402 Radar Service Search is a paid API for AI agents from ali-acids-helmet-cindy.trycloudflare.com, paid per call via x402, $0.005/call, status down (last checked 2026-10-03).

Search a merged index of 26,000+ x402 micropayment-enabled API services by keyword, returning ranked matches with pricing, network, liveness, and payTo address.

## Facts

- Endpoint: GET https://ali-acids-helmet-cindy.trycloudflare.com/api/search?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: down
- Last checked: 2026-10-03
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-radar-service-search-f75d5874
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_yeUuu7o6yq9xFO277Il60

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-radar-service-search-f75d5874
```

Example prompt: Search the x402 Radar index for live weather forecast APIs — show me the top results with their prices, networks, and payTo addresses so I can pick one to call.

## When to prefer this

Choose this endpoint when an AI agent needs to dynamically discover x402-compatible micropayment APIs by capability at runtime, especially when building agentic workflows that self-select paid tools. Prefer over manual API directories when you need liveness data, crypto payTo addresses, and price information in a single ranked response. Best when searching across both CDP Bazaar and PayAI indexes simultaneously.

## Known failure modes

- Empty results if query keywords don't match any indexed services
- Stale liveness data if endpoint hasn't been recently probed
- Missing price_usd for services with non-standard pricing
- Service listed but no longer active since last probe
- Cloudflare tunnel downtime causing endpoint unavailability
- Rate limiting or payment failure for $0.005 USDC charge

## How this service works

Search 26k+ x402 services (CDP Bazaar + PayAI merged index): q=keywords, returns ranked matches with price, network, payTo, liveness. By x402 Radar.

## Output

Returns a ranked list of matching x402 services, each with: service URL, payTo wallet address, source index (bazaar or payai), network identifier (e.g. eip155:8453), liveness probe result (alive status, x402 conformance, latency in ms), price in USD, relevance score, and description. Also returns total match count, number of results returned, and index update timestamp.

## 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",
     "required": [
      "q"
     ],
     "properties": {
      "q": {
       "type": "string",
       "description": "REQUIRED. Space-separated keywords, e.g. \"weather forecast\" or \"solana nft data\""
      },
      "limit": {
       "type": "integer",
       "description": "Optional. Max results 1-25, default 10"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "query": {
       "type": "string"
      },
      "results": {
       "type": "array",
       "items": {
        "type": "object",
        "properties": {
         "url": {
          "type": "string"
         },
         "payTo": {
          "type": "string"
         },
         "source": {
          "enum": [
           "bazaar",
           "payai"
          ],
          "type": "string"
         },
         "network": {
          "type": "string"
         },
         "liveness": {
          "type": "object",
          "description": "last probe result {at, alive, x402, latency_ms} or \"unprobed\""
         },
         "price_usd": {
          "type": "number"
         },
         "relevance": {
          "type": "number"
         },
         "description": {
          "type": "string"
         }
        }
       }
      },
      "returned": {
       "type": "number"
      },
      "index_updated": {
       "type": "string"
      },
      "total_matches": {
       "type": "number"
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "example": {
  "query": "weather",
  "results": [
   {
    "url": "https://api.example.com/forecast",
    "payTo": "0x9f8b...",
    "source": "payai",
    "network": "eip155:8453",
    "liveness": {
     "x402": true,
     "alive": true,
     "latency_ms": 210
    },
    "price_usd": 0.001,
    "relevance": 7,
    "description": "US weather forecast"
   }
  ],
  "returned": 1,
  "total_matches": 199
 },
 "properties": {
  "query": {
   "type": "string"
  },
  "results": {
   "type": "array",
   "items": {
    "type": "object",
    "properties": {
     "url": {
      "type": "string"
     },
     "payTo": {
      "type": "string"
     },
     "source": {
      "enum": [
       "bazaar",
       "payai"
      ],
      "type": "string"
     },
     "network": {
      "type": "string"
     },
     "liveness": {
      "type": "object",
      "description": "last probe result {at, alive, x402, latency_ms} or \"unprobed\""
     },
     "price_usd": {
      "type": "number"
     },
     "relevance": {
      "type": "number"
     },
     "description": {
      "type": "string"
     }
    }
   }
  },
  "returned": {
   "type": "number"
  },
  "index_updated": {
   "type": "string"
  },
  "total_matches": {
   "type": "number"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-radar-service-search-f75d5874/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from ali-acids-helmet-cindy.trycloudflare.com](https://www.zero.xyz/host/ali-acids-helmet-cindy.trycloudflare.com/llms.txt)