Funding Arb X402
Funding Rate Arbitrage Scanner API
Funding rate arbitrage scanner -- Hyperliquid, Binance, Bybit, OKX cross-venue spreads and annualized yields. 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": {
"funding-arb": {
"url": "https://funding-arb.api.klymax402.com/mcp"
}
}
}
Quickstart -- HTTP (x402)
curl "https://funding-arb.api.klymax402.com/api/scan"
# -> 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 |
|---|---|---|---|---|
perp_scan_funding_arbitrage | GET | /api/scan | $0.005 | Scan funding rate arbitrage opportunities across perpetual exchanges |
perp_scan_funding_arbitrage
Use this when you need to find funding rate arbitrage opportunities across perpetual exchanges. Returns cross-venue spreads in JSON.
Parameters
| Name | Type | Required | Description |
|---|---|---|---|
symbol | string | no | Filter by asset symbol (e.g. BTC, ETH, SOL). Optional — scans all assets if omitted. |
Returns
opportunities-- array of arb opportunities ranked by annualized yieldsymbol-- asset symbol (BTC, ETH, SOL, etc.)longExchange-- exchange where you go long (lower funding)shortExchange-- exchange where you go short (higher funding)spread-- funding rate difference between venuesannualizedYield-- estimated annualized return from the arbdirection-- suggested position direction per exchange
Example response:
{"opportunities":[{"symbol":"ETH","longExchange":"Bybit","shortExchange":"OKX","spread":0.0045,"annualizedYield":16.4,"direction":"long Bybit / short OKX"}],"scannedAssets":25,"timestamp":"2026-04-13T12:00:00Z"}
When to use: systematic funding rate arbitrage and delta-neutral carry strategies. Scans all major perpetual venues simultaneously.
Not for: spot prices (use dex_get_swap_quote), DeFi yields (use defi_find_best_yields).
Example agent prompts
- "Find funding rate arbitrage opportunities across perpetual exchanges"
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
Server Config
{
"mcpServers": {
"funding-arb": {
"url": "https://funding-arb-production-1034.up.railway.app/mcp",
"transport": "sse"
}
}
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