# x402 Data API – Uptime Incidents (Recently Failed APIs)

> x402 Data API – Uptime Incidents (Recently Failed APIs) is a paid API for AI agents from data.kagurazaka.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-29).

Returns x402 APIs that were previously operational but failed the most recent uptime check, sorted by number of payers (most paid first).

## Facts

- Endpoint: GET https://data.kagurazaka.dev/v1/uptime/incidents?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-data-api-uptime-incidents-recently-failed-apis-10827464
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_HfeFCczIAkN4YW7mQhpz7

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-data-api-uptime-incidents-recently-failed-apis-10827464
```

Example prompt: Show me up to 30 x402 APIs that recently went down — the ones that used to be working but failed the latest uptime check — prioritized by how many payers they have.

## When to prefer this

Use this endpoint when you need to identify x402 APIs that were previously healthy but have recently become unavailable, especially when you want to prioritize the most commercially active ones (by payer count). Prefer this over the general uptime ranking endpoint when you specifically want to surface incidents and failures rather than rank healthy APIs.

## Known failure modes

- No results returned if no APIs have recently failed uptime checks
- limit parameter out of range (must be 1-50) may return an error or be clamped
- Stale data possible if the 6-hour uptime check cycle hasn't run recently
- Network timeout if the underlying data store is unavailable

## How this service works

Data about the x402 market: the CDP Bazaar's listings, sellers, prices and categories, new listings and price changes from snapshots every 6 hours, uptime we measure for every paid listing, and x402 spending of any wallet and revenue of any seller on Base.

## Output

A JSON object with a total count of currently-failed x402 APIs and a results array containing each failed API's resource URL, the timestamp of its last successful check, the number of distinct payers in the last 30 days, and the timestamp of its most recent failure. Results are ordered by payer count descending (most-paid first).

## 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": {
      "limit": {
       "type": "integer",
       "description": "how many results (1-50, default 20)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "total": {},
      "results": {}
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "total": 15,
  "results": [
   {
    "resource": "https://api.example/v1/x",
    "last_ok_at": "2026-10-24T12:00:00Z",
    "payers_30d": 40,
    "last_failed_at": "2026-10-24T18:00:00Z"
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-data-api-uptime-incidents-recently-failed-apis-10827464/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from data.kagurazaka.dev](https://www.zero.xyz/host/data.kagurazaka.dev/llms.txt)