# ChainVerdict Pulse – x402 Endpoint Rankings

> ChainVerdict Pulse – x402 Endpoint Rankings is a paid API for AI agents from pulse.chainverdict.xyz, paid per call via x402, $0.07/call, status unknown (last checked 2026-09-14).

Returns a ranked directory of x402 endpoints sorted by measured live quality scores, including grade, latency, and pricing per endpoint.

## Facts

- Endpoint: GET https://pulse.chainverdict.xyz/v1/rankings
- Price: $0.07/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/chainverdict-pulse-x402-endpoint-rankings-5e464ca2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_2VlhWWNZKhzw71sTymm_y

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 chainverdict-pulse-x402-endpoint-rankings-5e464ca2
```

Example prompt: Pull up the current ChainVerdict Pulse rankings for x402 endpoints — I want to see which ones have the best quality scores, grades, and latency right now so I can decide which to integrate.

## When to prefer this

Choose this endpoint when you need a curated, quality-ranked view of the x402 endpoint ecosystem based on live measured performance rather than on-chain volume or self-reported metrics. It is the best choice for agent routing decisions, integration selection, or ecosystem health monitoring where objective, freshly measured quality data matters.

## Known failure modes

- Payment not provided or insufficient USDC (402 Payment Required)
- Endpoint temporarily unavailable or probe data stale
- Empty result set if no endpoints are currently tracked
- Rate limiting if called too frequently
- Network timeout if upstream probe aggregation is slow

## How this service works

x402 endpoint quality rankings: a ranked directory of x402 APIs by measured uptime and reliability rather than on-chain volume. Includes score, grade, latency and pricing per endpoint.

## Output

A ranked list of x402 endpoints with their quality score (numeric), grade (letter or tier), measured latency percentiles, and pricing per call — ordered from highest to lowest measured live quality.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "kind": {
   "enum": [
    "x402",
    "free",
    "error"
   ],
   "type": "string"
  },
  "limit": {
   "type": "integer"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "count": {
   "type": "number"
  },
  "rankings": {
   "type": "array",
   "items": {
    "type": "object",
    "properties": {
     "url": {
      "type": "string"
     },
     "grade": {
      "type": "string"
     },
     "score": {
      "type": "number"
     }
    }
   }
  },
  "generatedAt": {
   "type": "number"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/chainverdict-pulse-x402-endpoint-rankings-5e464ca2/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from pulse.chainverdict.xyz](https://www.zero.xyz/host/pulse.chainverdict.xyz/llms.txt)