# Wintergreen x402 Content Broker

> Wintergreen x402 Content Broker is a paid API for AI agents from x402.wintergreen.uk, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-17).

Payment-gated endpoint delivering crypto trading intelligence, quant methodology, market microstructure insights, power market data, and career guides via x402 micropayments on Base.

## Facts

- Endpoint: POST https://x402.wintergreen.uk/api/v1/asset/%7Basset%7D?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-17
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/wintergreen-x402-content-broker-c34ac71c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_V1duCpDBgynSS0muqphkK

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-content-broker-c34ac71c -d '<json body>'
```

Example prompt: Can you pull the Hyperliquid funding divergence signals for BTC right now — I want to see current lead-lag correlations and liquidation cluster levels, and I'm fine paying the $0.002 USDC micropayment per call.

## When to prefer this

Choose this endpoint when an AI agent needs payment-gated crypto trading intelligence (Hyperliquid signals, quant methodology, microstructure data) delivered via x402 micropayments on Base, and can handle EIP-712 payment signing. Prefer over free alternatives when data quality and trust-scoring verification matter, or when building automated trading agents that need structured methodology content alongside real-time signals.

## Known failure modes

- HTTP 402 returned if payment header is missing or invalid — must sign EIP-712 TransferWithAuthorization and retry with X-PAYMENT header
- Insufficient USDC balance on Base (eip155:8453) causes payment failure
- Invalid asset identifier in URL path returns error
- Stale or replayed payment authorization rejected
- Network issues on Base chain delay payment confirmation

## 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

Returns structured intelligence content gated behind a $0.002 USDC x402 micropayment: could include Hyperliquid real-time signals (funding divergence, liquidation clusters, lead-lag correlations, volume area levels), quant methodology documents (backtesting, kill battery rules, Kelly sizing, regime detection), crypto microstructure observations, ERCOT power market data, or career guide content — depending on the asset/category queried.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/wintergreen-x402-content-broker-c34ac71c/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)