# x402station.io Alternatives

> x402station.io Alternatives is a paid API for AI agents from x402station.io, paid per call via x402, $0.005000/call, status down (last checked 2026-09-15).

Returns up to 5 healthy fallback x402 endpoints when a primary endpoint is blocked or unavailable, ranked by settlement count and recency.

## Facts

- Endpoint: POST https://x402station.io/api/v1/alternatives
- Price: $0.005000/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402station-io-16a44954
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_n8yNhtNuij9aftW6AGy7V

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 x402station-io-16a44954 -d '<json body>'
```

Example prompt: The x402 endpoint I was using got blocked by preflight — can you find me up to 5 healthy alternative endpoints that handle the same task class, ranked by how recently they've had successful settlements?

## When to prefer this

Use this endpoint when a primary x402 endpoint has been blocked by Preflight or is otherwise unavailable, and the agent needs to dynamically reroute to a healthy alternative without manual intervention. Prefer over manual catalog search when you need ranked, settlement-verified options quickly.

## Known failure modes

- No healthy alternatives found for the given URL or task class — returns empty list
- Invalid or unrecognized URL format — returns 400 error
- Task class not recognized — returns empty or error response
- Rate limit exceeded — returns 429
- Payment not provided or insufficient — returns 402

## How this service works

Avoid paying unsafe x402 endpoints: ranked safe alternatives for the same capability.

## Output

A list of up to 5 healthy sibling x402 endpoints, each annotated with settlement count, recency signals, and CDP-quality metadata to help the agent choose the best fallback route.

## Example request

```json
{
 "url": "https://x402station.io/api/v1/alternatives",
 "limit": 3,
 "taskClass": "chat"
}
```

## 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": {
     "type": "object",
     "properties": {
      "url": {
       "type": "string",
       "format": "uri"
      },
      "limit": {
       "type": "integer",
       "maximum": 10,
       "minimum": 1
      },
      "taskClass": {
       "type": "string",
       "maxLength": 80
      }
     }
    },
    "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"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "target",
  "attribution",
  "alternatives",
  "match_strategy",
  "candidate_count_capped",
  "candidate_search_limit",
  "reason_no_alternatives"
 ],
 "properties": {
  "target": {
   "type": "object",
   "required": [
    "url",
    "service",
    "category",
    "currency",
    "provider",
    "price_usdc",
    "service_id"
   ],
   "properties": {
    "url": {
     "type": "string"
    },
    "service": {
     "type": "string"
    },
    "category": {
     "type": "null"
    },
    "currency": {
     "type": "string"
    },
    "provider": {
     "type": "string"
    },
    "price_usdc": {
     "type": "string"
    },
    "service_id": {
     "type": "string"
    }
   }
  },
  "attribution": {
   "type": "object",
   "required": [
    "url",
    "spec",
    "claim",
    "product",
    "authority"
   ],
   "properties": {
    "url": {
     "type": "string"
    },
    "spec": {
     "type": "string"
    },
    "claim": {
     "type": "string"
    },
    "product": {
     "type": "string"
    },
    "authority": {
     "type": "string"
    }
   }
  },
  "alternatives": {
   "type": "array",
   "items": {
    "type": "object",
    "required": [
     "url",
     "domain",
     "service",
     "category",
     "currency",
     "provider",
     "price_usdc",
     "service_id",
     "match_reason",
     "uptime_1h_pct",
     "uptime_7d_pct",
     "avg_latency_1h_ms"
    ],
    "properties": {
     "url": {
      "type": "string"
     },
     "domain": {
      "type": "string"
     },
     "service": {
      "type": "string"
     },
     "category": {
      "type": "null"
     },
     "currency": {
      "type": "string"
     },
     "provider": {
      "type": "string"
     },
     "price_usdc": {
      "type": "string"
     },
     "service_id": {
      "type": "string"
     },
     "match_reason": {
      "type": "string"
     },
     "uptime_1h_pct": {
      "type": "number"
     },
     "uptime_7d_pct": {
      "type": "number"
     },
     "avg_latency_1h_ms": {
      "type": "number"
     }
    }
   }
  },
  "match_strategy": {
   "type": "string"
  },
  "candidate_count_capped": {
   "type": "number"
  },
  "candidate_search_limit": {
   "type": "number"
  },
  "reason_no_alternatives": {
   "type": "null"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402station-io-16a44954/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402station.io](https://www.zero.xyz/host/x402station.io/llms.txt)