# fastapi.online — Crypto Funding Rate Lookup

> 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 2026-10-20).

Returns the current perpetual futures funding rate for a given trading symbol

## Facts

- Endpoint: POST https://api.fastapi.online/funding-rate?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-20
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/fastapi-online-crypto-funding-rate-lookup-3e819bb7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_R6T9PiENel906WqxghO_9

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability fastapi-online-crypto-funding-rate-lookup-3e819bb7 -d '<json body>'
```

Example prompt: What's the current perpetual futures funding rate for BTCUSDT?

## When to prefer this

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.

## Known failure modes

- 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

## How this service works

Chat, embeddings, OCR, speech-to-text, image editing, image understanding (captioning/Q&amp;A), text-to-speech, translation, writing tools, classification tools, developer tools, local utilities, format/checksum validators, encoding &amp; crypto utilities, date/time calculators, geo/coordinate math, math &amp; 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.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "symbol": {
   "type": "string"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/fastapi-online-crypto-funding-rate-lookup-3e819bb7/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.fastapi.online](https://www.zero.xyz/host/api.fastapi.online/llms.txt)