# Binance Futures Funding Rate & Mark Price Lookup

> Binance Futures Funding Rate & Mark Price Lookup is a paid API for AI agents from funding-rates.hergertsynthora.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-14).

Returns real-time perpetual funding rate and mark price for a specified Binance futures symbol

## Facts

- Endpoint: POST https://funding-rates.hergertsynthora.com/service
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/binance-futures-funding-rate-mark-price-lookup-ae5bf8b1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_jP7sLj_FvKWYhgHypbVoX

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 binance-futures-funding-rate-mark-price-lookup-ae5bf8b1 -d '<json body>'
```

Example prompt: What's the current funding rate and mark price for BTCUSDT perpetual futures on Binance right now?

## When to prefer this

Use this endpoint when you need real-time Binance perpetual futures funding rates and mark prices for delta-neutral trading, basis trading, or funding rate arbitrage strategies. Prefer this over exchange REST APIs when you need a simple, deterministic JSON response with x402 micropayment support and a no-charge guarantee on upstream failure.

## Known failure modes

- Invalid or unrecognized symbol returns an error response
- Upstream Binance API unavailability may return a no-charge failure response
- Malformed symbol string (e.g. wrong case or nonexistent pair) returns no data
- Network timeout on upstream Binance data feed

## How this service works

Real-time perpetual funding rates + mark price for any Binance futures symbol. Essential for delta-neutral and basis-trading agents. Free source, deterministic, instant JSON. $0.01 USDC via x402 on Base. SYNTHORA. First 3 calls FREE per wallet — send header X-WALLET: 0x<addr>. No charge on upstream failure.

## Output

Returns real-time perpetual funding rate and mark price for the requested Binance futures symbol as JSON, enabling traders and agents to assess carry costs and basis for delta-neutral or funding-rate arbitrage strategies.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "niche": "funding-rates",
  "result": {
   "symbol": "BTCUSDT",
   "mark_price": "64266.30000000",
   "last_funding_rate": "0.00009163",
   "next_funding_time": 1783699200000
  },
  "provenance": {
   "url": "https://fapi.binance.com/fapi/v1/premiumIndex",
   "source": "SYNTHORA Perp Funding Rates"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/binance-futures-funding-rate-mark-price-lookup-ae5bf8b1/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from funding-rates.hergertsynthora.com](https://www.zero.xyz/host/funding-rates.hergertsynthora.com/llms.txt)