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4SEC Futures Funding Rate Comparison API
x402
4SEC Futures Funding Rate Comparison API is a paid API for AI agents from api.foursec.xyz, paid per call via x402, $0.03/call, status down (last checked 2026-09-15).
Returns and compares perpetual futures funding rates for a given crypto symbol across multiple exchanges or DEXs, highlighting arbitrage opportunities.
Price / call$0.03
Success—
StatusDown
How this service works
Real-time multi-DEX aggregated crypto market data. Pay per request with USDC on Base via x402 protocol.
Output
A JSON object containing the queried symbol, a timestamp, an object with funding rates keyed by exchange or DEX, and an arbitrage opportunity object highlighting rate differentials and potential profit between venues.
Example use cases
Funding rate arbitrage scanner
“Check the funding rate comparison for ETH perps right now and tell me if there's a profitable arbitrage opportunity between exchanges.”
Cheapest perp venue selection
“I want to open a long ETH perpetual position — which exchange currently has the lowest funding rate so I pay the least to hold it?”
Funding rate monitoring for portfolio
“What are the current funding rates for SOL futures across all venues? I want to track whether they're converging or diverging today.”
Technical details
Endpoint
GEThttps://api.foursec.xyz/futures/funding-compare/%7Bsymbol%7DWhen to prefer
Choose this endpoint when you need a multi-venue funding rate comparison for crypto perpetual futures in a single call, especially when looking for arbitrage opportunities. It is ideal for DeFi traders, quant bots, or portfolio managers who want consolidated cross-exchange funding data without querying each venue separately. Prefer this over individual exchange APIs when cost-per-call ($0.03 USDC via x402) is acceptable and aggregated arbitrage signals are the primary goal.
Side effects
- Invalid or unsupported symbol returns an error or empty rates object
- Payment failure via x402 protocol results in 402 Payment Required response
- Rate limiting or service unavailability returns 5xx errors
- Symbol not listed on any tracked exchange returns empty or null rates
- Stale data if upstream exchange feeds are delayed
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| properties | string |
Output
Schema · Response
{
"type": "object",
"example": {
"rates": {
"type": "object"
},
"symbol": {
"type": "string"
},
"timestamp": {
"type": "string",
"format": "date-time"
},
"arb_opportunity": {
"type": "object"
}
}
}Tags
x402
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