# Cross-Venue Perpetual Funding-Rate Arbitrage Signal

> Cross-Venue Perpetual Funding-Rate Arbitrage Signal is a paid API for AI agents from x402-services-production.up.railway.app, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).

Returns annualized funding rates for a coin across Hyperliquid, Binance, and Bybit, plus the spread and the delta-neutral long/short leg to capture the arbitrage.

## Facts

- Endpoint: POST https://x402-services-production.up.railway.app/api/perps/funding-arb
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/cross-venue-perpetual-funding-rate-arbitrage-signal-757cefe1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_6Il1s5NBzBnd7B9PEoB9s

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 cross-venue-perpetual-funding-rate-arbitrage-signal-757cefe1 -d '<json body>'
```

Example prompt: What's the funding rate arbitrage opportunity for ETH right now — show me the annualized rates on Hyperliquid, Binance, and Bybit, the spread, and which legs I should go long and short to capture it delta-neutral?

## When to prefer this

Use this endpoint when you need a cross-venue funding rate comparison specifically across Hyperliquid, Binance, and Bybit with an explicit delta-neutral arbitrage leg recommendation. Prefer this over single-exchange funding endpoints when the goal is yield arbitrage rather than directional exposure, or when an agent needs a ready-made signal for funding-arb strategy execution.

## Known failure modes

- Unknown or unsupported coin symbol returns an error or empty data
- Exchange API outage may result in stale or partial data for one venue
- Very low-liquidity coins may have missing funding data on some exchanges
- Malformed request body (missing 'coin' field) returns a 400 error

## How this service works

Cross-venue funding-rate arbitrage for a coin: annualized funding on Hyperliquid vs Binance vs Bybit, the spread, and the delta-neutral long/short leg to capture it. Send { coin }. Delta-neutral yield signal for funding-arb agents.

## Output

Returns annualized funding rates for the requested coin on Hyperliquid, Binance, and Bybit; the basis spread between venues; and a delta-neutral trade recommendation specifying which exchange to go long and which to short to capture the funding differential.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "coin"
 ],
 "properties": {
  "coin": {
   "type": "string",
   "description": "Perp symbol, e.g. BTC"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/cross-venue-perpetual-funding-rate-arbitrage-signal-757cefe1/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-services-production.up.railway.app](https://www.zero.xyz/host/x402-services-production.up.railway.app/llms.txt)