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Doormat Capital Funding Rates API
x402
Doormat Capital Funding Rates API is a paid API for AI agents from signals.sebastiaan-ba3.workers.dev, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-16).
Returns live perpetual funding rates and market data for crypto markets sourced from Lighter DEX, with comparisons to Binance and Hyperliquid
Price / call$0.02
Success—
StatusUnknown
How this service works
Paid market-data endpoints settled in USDC on Base (x402). Pay by sending USDC to the address in the 402 challenge, then retry with header X-PAYMENT-TX: <tx hash>. Introductory pricing through 17 Oct 2026 on /funding (0.05 USDC normally) and /wallet-scan (0.20 USDC normally) — see each route's 402 response for the current amount.
Output
A JSON object containing per-market data including: symbol, mark price, open interest, 24h percentage change, 24h USD volume, Lighter 8-hour funding rate, funding spread versus other exchanges, and exchange-specific funding rates for Binance and Hyperliquid. Also includes the data source and a generated_at timestamp.
Example use cases
Funding rate arbitrage scanner
“Show me the current funding rate spreads for BTC between Lighter DEX and Binance and Hyperliquid — I want to know if there's a profitable arb opportunity right now.”
Perpetual market health dashboard
“Get me the latest open interest, mark price, and 24h volume for BTC perpetuals from the Doormat Capital signals feed so I can update my market dashboard.”
Automated funding rate alert
“Check the current 8-hour BTC funding rate on Lighter and tell me if it's positive or negative and by how much compared to other exchanges — I'm deciding whether to hold my long position overnight.”
Technical details
Endpoint
GEThttps://signals.sebastiaan-ba3.workers.dev/funding?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need live perpetual futures funding rates specifically from Lighter DEX alongside cross-exchange comparisons to Binance and Hyperliquid. Ideal for funding rate arbitrage detection, DeFi market monitoring, or any workflow requiring pay-per-call crypto market data settled on-chain via USDC on Base (x402 protocol). Prefer over free endpoints when data freshness and cross-exchange spread data are critical.
Side effects
- HTTP 402 Payment Required — must send USDC payment to the challenge address and retry with X-PAYMENT-TX header
- Invalid or unconfirmed transaction hash — payment not recognized, returns 402 again
- Network unavailability of Lighter public REST API — upstream data fetch fails
- Rate limiting or quota exceeded on the upstream Lighter API
- Empty or malformed query parameters — may return unexpected or partial results
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| input | — | |
| output | — |
Output
Schema · Response
{
"type": "json",
"example": {
"source": "Lighter public REST API (mainnet.zklighter.elliot.ai), fetched live for this request",
"markets": [
{
"symbol": "BTC",
"mark_price": 63250.5,
"open_interest": 1234.56,
"change_24h_pct": 1.42,
"volume_24h_usd": 812345678,
"other_exchange_rates": {
"binance": 0.00012,
"hyperliquid": 0.00009
},
"lighter_funding_rate_8h": 0.0001,
"funding_spread_vs_others": -0.00001
}
],
"generated_at": "2026-09-29T12:00:00.000Z"
}
}Tags
x402
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