# Starchild Relay – Futures Funding Rate by Exchange

> Starchild Relay – Futures Funding Rate by Exchange is a paid API for AI agents from 5108-data-api-proxy.community.iamstarchild.com, paid per call via x402, $0.00001/call, status unknown (last checked 2026-09-16).

Returns a list of perpetual futures funding rates for a given crypto symbol across multiple exchanges via CoinGlass data.

## Facts

- Endpoint: POST https://5108-data-api-proxy.community.iamstarchild.com/coinglass/api/futures/funding-rate/exchange-list
- Price: $0.00001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/starchild-relay-futures-funding-rate-by-exchange-bd37b442
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_vbGEuaukwEUR1tpzNEp3P

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 starchild-relay-futures-funding-rate-by-exchange-bd37b442 -d '<json body>'
```

Example prompt: What are the current BTC perpetual futures funding rates across all major exchanges right now?

## When to prefer this

Use this endpoint when you need cross-exchange funding rate data for a specific crypto asset in a single call, especially if you're already using the Starchild Relay x402 payment infrastructure for other crypto data. Prefer this over direct CoinGlass API access when you want a pay-per-call micropayment model without a monthly subscription, or when you need to combine funding rate data with other Starchild endpoints (spot, OI, liquidations) in a unified workflow.

## Known failure modes

- 402 Payment Required if X-PAYMENT header is missing or invalid — agent must complete x402 payment flow first
- Empty or null result if the symbol is not recognized or has no active futures markets
- Upstream CoinGlass API unavailability causing 502/503 errors
- Invalid symbol format returning an error or empty response
- Rate limiting or quota errors if the payment signature is replayed

## How this service works

All-in-one reputable data source for AI agents and developers. Crypto spot/OHLC, derivatives funding rates, open interest, liquidations, forex, commodities, indices, social sentiment, DeFi protocols, and more — 17+ upstream data sources behind a single x402 paywall.

Usage: Send requests to any proxied path (e.g. GET /coingecko/api/v3/...). Unauthenticated requests receive a 402 challenge with payment instructions. Include X-PAYMENT header with a valid signature to access data.

## Output

A list of funding rates for the specified crypto symbol (e.g. BTC) broken down by exchange, sourced from CoinGlass via the Starchild Relay proxy. Typically includes exchange name and the current annualized or periodic funding rate for each perpetual futures market.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "symbol": {
   "type": "string",
   "description": "Instrument symbol (e.g. BTC)"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/starchild-relay-futures-funding-rate-by-exchange-bd37b442/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from 5108-data-api-proxy.community.iamstarchild.com](https://www.zero.xyz/host/5108-data-api-proxy.community.iamstarchild.com/llms.txt)