# Wintergreen x402 Power Markets Guide

> Wintergreen x402 Power Markets Guide is a paid API for AI agents from x402.wintergreen.uk, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).

Returns a payment-gated ERCOT power markets field guide covering merit-order models, duck curve analysis, and electricity market microstructure for AI agents.

## Facts

- Endpoint: GET https://x402.wintergreen.uk/api/v1/power-markets
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/wintergreen-x402-power-markets-guide-179fb27c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_MXz7aH74RkkMvbB2y7Xyx

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-guide-179fb27c
```

Example prompt: Pull the Wintergreen power markets field guide — I need ERCOT merit-order and duck curve analysis for my energy trading research, and pay the $2 USDC fee automatically.

## When to prefer this

Choose this endpoint when an AI agent needs structured ERCOT or power market intelligence in a pay-per-call model without a subscription, particularly for merit-order modeling, duck curve analysis, or electricity market microstructure. Prefer it over subscription energy data APIs when you need on-demand, low-commitment access to curated power market field guides payable in USDC on Base.

## Known failure modes

- HTTP 402 returned if payment header is missing or invalid — must sign EIP-712 TransferWithAuthorization and retry with X-PAYMENT header
- Payment to wrong address or wrong chain (must use Base eip155:8453) causes transaction failure
- Insufficient USDC balance results in failed payment authorization
- Malformed format parameter may return unexpected response structure
- Response schema is not formally specified — output structure may vary

## 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 structured field guide covering ERCOT power market mechanics including merit-order dispatch models, duck curve dynamics, and electricity market microstructure observations, returned as JSON or formatted content after successful $2 USDC payment via EIP-712 TransferWithAuthorization on Base.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "format": {
   "enum": [
    "json"
   ],
   "type": "string",
   "description": "Optional response format hint (json). No required inputs."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/wintergreen-x402-power-markets-guide-179fb27c/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)