Hyperliquid Funding Rates API

Real-time and historical Hyperliquid funding rates for 229 perp markets. Sort by highest/lowest, find arb opportunities. Zero-cost data. Pay-per-call via x402 (USDC on Base L2) -- no API key, no signup, no rate-limit wall.

Part of the klymax402 marketplace -- 100 x402 micropayment APIs for AI agents, one wallet, USDC on Base.

Quickstart -- MCP

Add to your MCP client config (Claude Desktop, Cursor, ElizaOS, etc.):

{
  "mcpServers": {
    "hl-funding": {
      "url": "https://hl-funding.api.klymax402.com/mcp"
    }
  }
}

Quickstart -- HTTP (x402)

curl -X POST "https://hl-funding.api.klymax402.com/api/rates" \
  -H "Content-Type: application/json" \
  -d '{}'
# -> 402 Payment Required, with an x402 payment challenge in the response body

Any x402-aware client (@x402/fetch, x402-agent-tools, ATXP) handles the 402 -> sign -> retry cycle automatically.

Tools

Tool	Method	Path	Price	Description
hyperliquid_get_funding_rates	POST	/api/rates	$0.002	Current funding rates for all 229 Hyperliquid perp markets sorted by rate
hyperliquid_get_funding_history	POST	/api/history	$0.002	Historical funding rate data for a specific Hyperliquid coin
hyperliquid_find_funding_arb	POST	/api/arb	$0.002	Find funding rate arbitrage opportunities -- coins with extreme positive or negative rates

hyperliquid_get_funding_rates

Use this when you need current funding rates across all Hyperliquid perpetual markets. Returns real-time funding rate, premium, open interest, and mark price for every listed perp coin on Hyperliquid DEX, sorted by your chosen criteria.

Parameters

Name	Type	Required	Description
sort	string	no	Sort order for funding rates. 'highest' = most positive first (shorts pay longs), 'lowest' = most negative first (longs pay shorts), 'abs' = highest absolute value first (default).

Example response:

{ totalMarkets: 229, sort: "abs", rates: [{ coin: "BTC", fundingRate: 0.000125, annualizedRate: 13.69, premium: 0.0002, openInterest: 1250000000, markPrice: 68500.5 }, ...] }

When to use: opening perp positions to check funding cost. Essential for carry trade analysis, market sentiment gauging, and identifying crowded trades.

Not for: historical funding data (use hyperliquid_get_funding_history), vault performance data (use hyperliquid_get_vault_details), whale position tracking (use hyperliquid_track_whale_positions).

hyperliquid_get_funding_history

Use this when you need historical funding rate data for a specific Hyperliquid perpetual market. Returns timestamped funding rate entries over a configurable lookback window, plus summary statistics including average, min, max, and standard deviation.

Parameters

Name	Type	Required	Description
coin	string	yes	Coin ticker symbol (e.g. BTC, ETH, SOL, DOGE). Must match a Hyperliquid perp market.
hours	number	no	Lookback window in hours. Default: 24. Max: 720 (30 days). Each funding period is 8 hours, so 24h returns ~3 entries.

Example response:

{ coin: "ETH", hours: 24, entries: [{ time: "2026-04-13T08:00:00Z", fundingRate: 0.0001, annualizedRate: 10.95 }, ...], summary: { count: 3, avgRate: 0.00012, avgAnnualized: 13.14, minRate: 0.00008, maxRate: 0.00015, stdDev: 0.000029 } }

Not for: current rates across all markets (use hyperliquid_get_funding_rates), CEX funding rates (use funding_rates_get_current).

hyperliquid_find_funding_arb

Use this when you need to find funding rate arbitrage opportunities on Hyperliquid. Scans all 229 perp markets and returns coins where the absolute funding rate exceeds 0.01% per 8h period (annualized > 36%), flagged as long or short opportunities based on rate direction.

Parameters

Name	Type	Required	Description
threshold	number	no	Minimum absolute funding rate to qualify as an arb opportunity. Default: 0.0001 (0.01% per 8h, ~36% annualized). Lower values return more results.

Example response:

{ threshold: 0.0001, totalOpportunities: 12, longOpportunities: 5, shortOpportunities: 7, opportunities: [{ coin: "PEPE", fundingRate: 0.0005, annualizedRate: 54.75, direction: "short opportunity", openInterest: 85000000, markPrice: 0.0000125, premium: 0.001 }, ...] }

Not for: historical funding trends (use hyperliquid_get_funding_history), DEX swap quotes (use dex_get_swap_quote), DeFi yield farming (use defi_find_best_yields).

Example agent prompts

• "Current funding rates across all Hyperliquid perpetual markets"
• "Historical funding rate data for a specific Hyperliquid perpetual market"
• "Find funding rate arbitrage opportunities on Hyperliquid"

Payment

• Protocol: x402 -- HTTP-native pay-per-call, no signup, no API key
• Network: Base L2 (eip155:8453)
• Asset: USDC
• Facilitator: Coinbase CDP (primary), PayAI (fallback)
• Also reachable via ATXP (OAuth-wrapped x402, RFC 9728 protected-resource metadata)

Part of klymax402

100 x402 micropayment APIs for AI agents -- one wallet, USDC on Base, zero signup.

• Catalog: https://klymax402.com/llms.txt
• Full API reference: https://klymax402.com/llms-full.txt
• Live stats: https://klymax402.com/stats

License

MIT