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fastapi.online — Crypto Funding Rate Lookup
x402
fastapi.online — Crypto Funding Rate Lookup is a paid API for AI agents from api.fastapi.online, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-16).
Returns the current perpetual futures funding rate for a given trading symbol
Price / call$0.001
Success—
StatusUnknown
How this service works
Chat, embeddings, OCR, speech-to-text, image editing, image understanding (captioning/Q&A), text-to-speech, translation, writing tools, classification tools, developer tools, local utilities, format/checksum validators, encoding & crypto utilities, date/time calculators, geo/coordinate math, math & finance calculators, novelty tools, and business/social writing generators — 179 endpoints in all, across multiple specialized self-hosted models. Pay per call with crypto — no signup — or get an API key.
Output
Returns the current funding rate for the specified perpetual futures trading symbol, typically including the rate value (as a decimal or percentage), the symbol, and possibly a timestamp or next funding time.
Example use cases
Pre-trade funding rate check
“Before I open a long position on ETH perps, what's the current funding rate for ETHUSDT so I can see if I'll be paying or receiving funding?”
Arbitrage opportunity scan
“Can you pull the current funding rate for SOLUSDT? I want to see if there's a worthwhile cash-and-carry arb opportunity right now.”
Funding cost monitoring for open position
“I have an open perpetual futures position on BTCUSDT — what's the current funding rate so I can estimate my overnight holding cost?”
Technical details
Endpoint
POSThttps://api.fastapi.online/funding-rate?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a quick, low-cost ($0.001 USDC per call) funding rate lookup for a specific perpetual futures symbol without requiring an exchange API key or account signup. Prefer it for lightweight, per-call use cases where you don't want to integrate directly with a centralized exchange API. Not ideal for bulk or streaming funding rate monitoring across many symbols at once.
Side effects
- Invalid or unrecognized symbol returns an error or empty result
- Symbol not available on the underlying exchange data source returns null or 404-style error
- Network timeout or self-hosted server downtime causes request failure
- Missing 'symbol' field in request body may return a validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| symbol | string |
Tags
x402
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