# Wintergreen x402 Power Markets Content Broker

> Wintergreen x402 Power Markets Content Broker is a paid API for AI agents from x402.wintergreen.uk, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-13).

Delivers payment-gated power market intelligence (ERCOT field guide, merit-order model, duck curve analysis) for AI agents via x402 micropayment protocol on Base.

## Facts

- Endpoint: POST https://x402.wintergreen.uk/api/v1/power-markets/%7Bcontent_id%7D
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/wintergreen-x402-power-markets-content-broker-711abf99
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_nSHpTxX_kv4nyupVUtkKv

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-power-markets-content-broker-711abf99 -d '<json body>'
```

Example prompt: Pull the ERCOT power market field guide content from Wintergreen — pay the $0.50 USDC fee on Base and give me the duck curve analysis and merit-order model breakdown.

## When to prefer this

Choose this endpoint when an AI agent needs on-demand power market intelligence — specifically ERCOT grid dynamics, merit-order dispatch models, or duck curve analysis — and can execute x402 micropayments in USDC on Base. Ideal for energy trading agents, quant researchers, and grid analysis workflows that need pay-per-call access without API key subscriptions.

## Known failure modes

- HTTP 402 returned if payment header is missing or malformed — must retry with valid X-PAYMENT header containing EIP-712 TransferWithAuthorization signature
- Invalid content_id in URL path returns 404 or empty response
- Insufficient USDC balance or failed on-chain authorization causes payment rejection
- Stale or replayed payment signatures may be rejected by the facilitator
- Network issues on Base chain can delay payment settlement and content delivery

## 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 power market intelligence content — including ERCOT operational field guide, merit-order model stack analysis, and duck curve/renewable generation analysis — delivered as paid content after successful EIP-712 USDC authorization on Base.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/wintergreen-x402-power-markets-content-broker-711abf99/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)