# Wintergreen x402 Funding Snapshot

> Wintergreen x402 Funding Snapshot is a paid API for AI agents from x402.wintergreen.uk, paid per call via x402, $0.001/call, status down (last checked 2026-09-15).

Returns a real-time funding rate snapshot for a given crypto symbol, gated behind a $0.001 USDC micropayment via x402.

## Facts

- Endpoint: GET https://x402.wintergreen.uk/api/v1/quant/funding-snapshot
- Price: $0.001/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/wintergreen-x402-funding-snapshot-77ed71aa
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_-Rr5P1G6MNpB_K6YUuxcZ

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 wintergreen-x402-funding-snapshot-77ed71aa
```

Example prompt: Pull the current funding rate snapshot for BTC from the Wintergreen x402 endpoint — I want to see if there's a notable divergence I can trade right now.

## When to prefer this

Choose this endpoint when you need real-time funding rate data specifically from or related to the Hyperliquid exchange, and you are operating in a micropayment-capable agent environment that can handle x402/EIP-712 payment flows. It is well-suited for autonomous trading agents that need low-cost, per-call data without a subscription. Prefer alternatives if you need bulk historical funding data or don't have USDC on Base available for payments.

## Known failure modes

- HTTP 402 returned if USDC payment header is missing or invalid — agent must sign EIP-712 TransferWithAuthorization and retry
- Invalid or unsupported symbol returns an error or empty response
- Network timeout if Hyperliquid data feed is temporarily unavailable
- Stale data if the upstream feed has a delay
- Payment rejected if wallet has insufficient USDC on Base (eip155:8453)

## How this service works

Payment-gated crypto trading intelligence for AI agents.
    
## Categories
- **Hyperliquid Signals**: Real-time funding divergence, lead-lag correlation, liquidation clusters, session volume area levels
- **Quant Methodology**: Backtesting walk-forward validation, strategy generation with kill battery (19 rules), risk management with Kelly sizing, regime detection, execution frameworks, agent orchestration
- **Market Insights**: 22 crypto microstructure observations — funding, liquidation, orderbook, regime, flow, anomaly
- **Power Markets**: ERCOT field guide, merit-order model, duck curve analysis
- **Career Guides**: Firefighter oral board prep, medical coding, ATSA, contractor estimating
- **Trust Scoring**: x402 endpoint verification, P2D badges

## Payment
All paid endpoints return HTTP 402 with USDC on Base (eip155:8453). 
Sign EIP-712 TransferWithAuthorization and retry with X-PAYMENT header.
PayTo: 0xAe9834d71F1Bd989A0dc17593451af823E31CeeD

## Output

A real-time funding rate snapshot for the requested crypto symbol, likely including current funding rate, recent divergence metrics, and session-level volume or liquidation context as defined by the Hyperliquid signals category.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/wintergreen-x402-funding-snapshot-77ed71aa/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.wintergreen.uk](https://www.zero.xyz/host/x402.wintergreen.uk/llms.txt)