# SiteCheck Crypto Funding Rates

> SiteCheck Crypto Funding Rates 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 2026-10-16).

Fetches perpetual futures funding rates, open interest, and mark prices for a given cryptocurrency across multiple major venues (Hyperliquid, OKX, Deribit, dYdX)

## Facts

- Endpoint: GET https://api.sitecheck-api.workers.dev/api/crypto/funding?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sitecheck-crypto-funding-rates-843547e4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_5ZTaqdaGAlVIKbPHXVDdY

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-crypto-funding-rates-843547e4
```

Example prompt: What are the current perpetual futures funding rates for BTC across Hyperliquid, OKX, Deribit, and dYdX — including the annualised rate and open interest at each venue?

## When to prefer this

Use this endpoint when you need real-time perpetual futures funding rate data aggregated across multiple major crypto derivatives venues in a single call. Prefer this over scraping individual exchange APIs when you need a cross-venue comparison of funding rates, open interest, and mark prices for a given coin ticker in one unified response.

## Known failure modes

- Unknown or unsupported coin ticker returns an empty venues array or error
- Venue API temporarily unavailable — affected venue appears in 'unavailable' array
- Invalid coin parameter format (must be 2–10 alphanumeric characters) returns validation error
- Network timeout from upstream venue APIs may result in partial data

## How this service works

Perpetual futures funding for one coin across Hyperliquid, OKX, Deribit and dYdX v4: the current funding rate, the interval (1 or 8 hours), the annualised rate, the next funding time, open interest in coins and USD, and the mark or oracle price. A venue that does not list the coin is left out and named in unavailable. Rates are as the venues publish them; funding is paid between traders, not to the venue. Information only, not financial advice.

## Output

Returns a JSON object containing, for each supported venue: the venue name, trading symbol, mark price, current funding rate (as a decimal), annualised funding rate, next funding timestamp, open interest in USD and in coins, and funding interval in hours. Also includes the coin ticker, count of venues returned, data sources, check timestamp, and a disclaimer.

## 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": [
      "coin"
     ],
     "properties": {
      "coin": {
       "type": "string",
       "description": "Coin ticker, 2 to 10 letters or digits, e.g. BTC, ETH or SOL"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "coin": "BTC",
  "count": 4,
  "source": "Hyperliquid info API, OKX public API, Deribit public API, dYdX v4 indexer (funding, open interest, mark or oracle price)",
  "venues": [
   {
    "venue": "Hyperliquid",
    "symbol": "BTC-PERP",
    "markPrice": 80595,
    "fundingRate": -3.451e-7,
    "annualisedRate": -0.003023076,
    "nextFundingTime": "2026-10-15T14:00:00.000Z",
    "openInterestUsd": 3234347967.339,
    "openInterestCoins": 40130.8762,
    "fundingIntervalHours": 1
   },
   {
    "venue": "OKX",
    "symbol": "BTC-USDT-SWAP",
    "markPrice": 80665.2,
    "fundingRate": 0.0000355757549793,
    "annualisedRate": 0.0389554517023335,
    "nextFundingTime": "2026-10-16T00:00:00.000Z",
    "openInterestUsd": 2479076416.491917,
    "openInterestCoins": 30761.32130000009,
    "fundingIntervalHours": 8
   },
   {
    "venue": "Deribit",
    "symbol": "BTC-PERPETUAL",
    "markPrice": 80633.35,
    "fundingRate": 0.00002998,
    "annualisedRate": 0.0328281,
    "nextFundingTime": "2026-10-15T16:00:00.000Z",
    "openInterestUsd": 885841470,
    "openInterestCoins": 10986.0432438935,
    "fundingIntervalHours": 8
   }
  ],
  "checkedAt": "2026-10-15T13:40:00.658Z",
  "disclaimer": "Information only, not financial advice.",
  "unavailable": []
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/sitecheck-crypto-funding-rates-843547e4/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)