# Hyperliquid Perpetuals Funding Rate & Open Interest API (x402)

> Hyperliquid Perpetuals Funding Rate & Open Interest API (x402) is a paid API for AI agents from kr-x402-mvp.kgy5612.workers.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-31).

Returns real-time perpetual futures funding rate, mark/oracle price, and open interest for BTC, ETH, or SOL from Hyperliquid via pay-per-call x402 micropayment

## Facts

- Endpoint: GET https://kr-x402-mvp.kgy5612.workers.dev/v1/crypto/funding?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/hyperliquid-perpetuals-funding-rate-open-interest-api-x402-b82f2672
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_tNPhWDhkBSL3LpLHPCVsw

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 hyperliquid-perpetuals-funding-rate-open-interest-api-x402-b82f2672
```

Example prompt: What's the current hourly funding rate and annualized APR for BTC perpetuals on Hyperliquid, and how much open interest is there right now?

## When to prefer this

Choose this endpoint when you need real-time Hyperliquid-specific perpetual futures data (funding rate, open interest, mark/oracle prices) without API key setup, paying only $0.005 USDC per call via x402. Prefer it over generic market data APIs when your agent needs Hyperliquid-native funding rates for carry-trade calculations, liquidation monitoring, or on-chain strategy automation on Base.

## Known failure modes

- Invalid coin symbol not in [BTC, ETH, SOL] returns an error or defaults to BTC
- x402 payment failure if USDC balance on Base is insufficient results in 402 response with no data
- Hyperliquid API upstream outage may cause stale or missing data
- Network timeout on the Cloudflare Worker edge node

## How this service works

Pay-per-call crypto microdata for trading/onchain AI agents via x402 (USDC on Base): Base gas, token risk, balances, multi-venue prices, Hyperliquid book/funding, kimchi premium. No API keys.

## Output

A JSON object containing for the requested coin: mark price, oracle price, open interest (raw and USD-denominated), hourly funding rate, annualized funding APR in percent, the venue name ('hyperliquid'), upstream data sources, and an updated_at ISO timestamp.

## 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": {
      "coin": {
       "enum": [
        "BTC",
        "ETH",
        "SOL"
       ],
       "type": "string",
       "examples": [
        "BTC",
        "ETH",
        "SOL"
       ],
       "description": "Perp coin (default BTC)"
      }
     },
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "coins": {
   "BTC": {
    "mark_px": 80860,
    "oracle_px": 80870,
    "open_interest": 30000,
    "funding_hourly": 0.0000125,
    "funding_apr_pct": 10.95,
    "open_interest_usd": 2426000000
   }
  },
  "venue": "hyperliquid",
  "sources": [
   "https://api.hyperliquid.xyz/info"
  ],
  "updated_at": "2026-10-28T11:00:00Z"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/hyperliquid-perpetuals-funding-rate-open-interest-api-x402-b82f2672/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from kr-x402-mvp.kgy5612.workers.dev](https://www.zero.xyz/host/kr-x402-mvp.kgy5612.workers.dev/llms.txt)