# SiteCheck Perpetuals Markets

> SiteCheck Perpetuals Markets is a paid API for AI agents from api.sitecheck-api.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-28).

Returns live perpetual futures market data (mark price, oracle price, funding rate, open interest, volume) for crypto assets via Hyperliquid

## Facts

- Endpoint: GET https://api.sitecheck-api.workers.dev/api/perps/markets?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-28
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sitecheck-perpetuals-markets-d5993e62
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_jPKVM54MASwFerYveJZSD

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 sitecheck-perpetuals-markets-d5993e62
```

Example prompt: What are the current perpetual futures market stats for BTC — mark price, funding rate, and open interest — from Hyperliquid?

## When to prefer this

Use this endpoint when you need real-time perpetual futures market data including funding rates, open interest, and mark prices sourced from Hyperliquid. Prefer it over generic crypto price endpoints when derivatives-specific metrics like funding rate, max leverage, or open interest are required.

## Known failure modes

- Invalid coin symbol returns empty markets array or error
- limit parameter outside 1-50 range may be clamped or rejected
- Upstream Hyperliquid API unavailability causes 502 or timeout
- Payment not included or insufficient results in 402 Payment Required

## How this service works

Hyperliquid perpetual futures: mark and oracle price, hourly and annualised funding, open interest in coins and USD, 24 h volume and maximum leverage, sorted by volume. With coin, that market only. Public data, cached 30 seconds. Information only, not financial advice.

## Output

A JSON object containing an array of perpetual market records sourced from Hyperliquid, each with coin symbol, mark price, oracle price, max leverage, 24h USD volume, hourly and annualized funding rate, open interest in USD and coins, plus a timestamp and total market count.

## 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": [],
     "properties": {
      "coin": {
       "type": "string",
       "description": "Optional symbol such as BTC or ETH"
      },
      "limit": {
       "type": "string",
       "description": "1 to 50 (default 10)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "source": "https://api.hyperliquid.xyz/info (metaAndAssetCtxs)",
  "markets": [
   {
    "coin": "BTC",
    "markPx": 83395,
    "oraclePx": 83429.1,
    "maxLeverage": 40,
    "volume24hUsd": 1991620476,
    "fundingHourly": 0.0000125,
    "openInterestUsd": 3155280795,
    "openInterestCoins": 37835.37136,
    "fundingAnnualizedPct": 10.95
   }
  ],
  "checkedAt": "2026-10-14T07:00:22.018Z",
  "disclaimer": "Information only, not financial advice.",
  "marketCount": 178
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/sitecheck-perpetuals-markets-d5993e62/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.sitecheck-api.workers.dev](https://www.zero.xyz/host/api.sitecheck-api.workers.dev/llms.txt)