# SperaxOS Binance Funding Rate API

> SperaxOS Binance Funding Rate API is a paid API for AI agents from chat.sperax.io, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-03).

Fetches current and historical perpetual futures funding rates for a given trading pair from Binance via a pay-per-request x402 endpoint.

## Facts

- Endpoint: POST https://chat.sperax.io/api/x402/tools/binance-market/getFundingRate?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-03
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/speraxos-binance-funding-rate-api-1c75601d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_AxP2F2J7IHqCA927rNFEd

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 speraxos-binance-funding-rate-api-1c75601d -d '<json body>'
```

Example prompt: What's the current funding rate for BTC perpetual futures on Binance? Pull the last 8 periods so I can see the recent trend.

## When to prefer this

Choose this endpoint when you need Binance-specific perpetual futures funding rates with historical depth and no API key setup — ideal for DeFi agents making pay-per-use micro-payment calls via x402 on Base. Prefer this over scraping or centralized data providers when you want trustless per-call pricing and don't want to manage API credentials.

## Known failure modes

- Invalid or unrecognized trading pair symbol returns an error or empty result
- Limit value outside 1–100 range may be rejected or clamped
- Binance API downtime or rate limiting may cause upstream errors
- Payment failure via x402 protocol blocks the request
- Requesting a symbol not listed on Binance perpetuals returns no data

## How this service works

AI-powered DeFi intelligence APIs payable via the x402 HTTP payment protocol. No API key required — pay per request with USDC on Base. Identity-only (SIWX) endpoints are free for wallets with an agentcash identity.

## Output

Returns an array of historical funding rate records for the requested trading pair, each including the funding rate value and the timestamp or period index. The number of records returned matches the requested limit (default 8, up to 100).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "limit": {
   "type": "number",
   "default": 8,
   "description": "Number of historical funding periods to include (1–100)."
  },
  "symbol": {
   "type": "string",
   "description": "Trading pair in any common form: \"BTCUSDT\", \"BTC/USDT\" or a bare \"BTC\" (a USDT quote is assumed)."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/speraxos-binance-funding-rate-api-1c75601d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from chat.sperax.io](https://www.zero.xyz/host/chat.sperax.io/llms.txt)