Hyperliquid funding rate and open interest API

$0.01 per call · failed calls are never charged · no account or subscription: pay per call with a card key or USDC

Live Hyperliquid perpetual futures data for a coin (BTC, ETH, SOL, HYPE…): mark, oracle and mid price, hourly funding rate and its APR, premium, open interest in coins and USD, 24-hour volume and price change, and max leverage. Without a coin, the 20 most traded markets by 24-hour volume. Read from Hyperliquid's public API. Use for funding-rate checks, basis trades, derivatives dashboards and market context.

When to use it

Guide: Hyperliquid funding rate API

Run it free (25 free calls) Buy credits by card (from $1) Example result (JSON)

Try it with your own inputs

Coin symbol such as BTC, ETH, SOL or HYPE (default: the 20 most traded markets)

Uses one of your 25 free calls. Nothing is charged, and a call that fails is not counted.

Inputs

NameTypeDescription
coinstringCoin symbol such as BTC, ETH, SOL or HYPE (default: the 20 most traded markets)

Request

Over HTTP, with a card key from /credits:

curl -H "Authorization: Bearer adt_…" "https://tools.funwords.eu/hyperliquid/market?coin=BTC"

Or one of your 25 free calls, no key:

curl "https://tools.funwords.eu/hyperliquid/market?coin=BTC&trial=1"

Without a key, the same URL answers 402 Payment Required with x402 and MPP terms, so an agent with a wallet pays per call in USDC (Base, Polygon, Arbitrum or Solana over x402; Base or Tempo over MPP) and retries.

Example result

{
  "count": 1,
  "markets": [
    {
      "coin": "BTC",
      "markPx": 82478,
      "oraclePx": 82505,
      "midPx": 82478.5,
      "fundingRateHourly": 0.0000125,
      "fundingAprPct": 10.95,
      "premium": -0.000315,
      "openInterest": 41244.6,
      "openInterestUsd": 3401847000,
      "dayVolumeUsd": 2604051652,
      "prevDayPx": 81939,
      "change24hPct": 0.66,
      "maxLeverage": 40
    }
  ],
  "source": "Hyperliquid public info API"
}

From an AI agent (MCP)

Add the MCP server to Claude, Cursor or any MCP client. This tool is hyperliquid_market, and the first 25 successful calls are free:

https://tools.funwords.eu/mcp

Questions

Where does the data come from?

Hyperliquid's public API, read at call time.

How do I pay?

Each successful call costs $0.01; failed calls are not charged. The first 25 calls are free. Then pay with card credits (from $1; the key goes in an Authorization header or, for clients that can only fetch a URL, as api_key= in the URL) or per call in USDC over x402 or MPP. No account is needed.

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