# Wintergreen x402 Pricing Strategy Knowledge Endpoint

> Wintergreen x402 Pricing Strategy Knowledge Endpoint is a paid API for AI agents from x402.wintergreen.uk, paid per call via x402, $0.01/call, status down (last checked 2026-09-16).

Delivers payment-gated pricing strategy knowledge content (crypto trading intelligence, quant methodology, and market insights) for $0.50 USDC per call via the x402 micropayment protocol.

## Facts

- Endpoint: GET https://x402.wintergreen.uk/api/v1/knowledge/pricing-strategy
- Price: $0.01/call
- Payment: x402
- Status: down
- Last checked: 2026-09-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/wintergreen-x402-pricing-strategy-knowledge-endpoint-0be44d7b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_pw3CLvwQFtXllMIFuhzTz

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-pricing-strategy-knowledge-endpoint-0be44d7b
```

Example prompt: Can you pull the pricing strategy guide from the Wintergreen knowledge broker? I'm happy to pay the USDC fee — I want to understand how they recommend sizing and pricing entries for crypto trades.

## When to prefer this

Choose this endpoint when an AI agent needs curated crypto trading intelligence, quant methodology documentation, or market microstructure insights and can autonomously handle x402 micropayment flows (EIP-712 USDC on Base). It is well-suited for agents that already have a Base wallet funded with USDC and need on-demand, per-query access to premium knowledge without a subscription. Prefer this over broader data APIs when the goal is retrieving structured trading knowledge articles rather than live market data feeds.

## Known failure modes

- HTTP 402 returned if payment header is missing or authorization is invalid — agent must sign EIP-712 TransferWithAuthorization and retry
- Invalid or missing file_slug/route_slug parameters may return empty or incorrect content
- USDC balance insufficient on Base mainnet prevents payment authorization
- Stale or replayed payment signatures may be rejected
- Content may be unavailable if the requested slug does not map to an existing article

## 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 knowledge document or article covering pricing strategy topics relevant to crypto trading intelligence, which may include quant methodology, Hyperliquid signal interpretations, risk sizing frameworks, or market microstructure pricing insights. The response is delivered after successful EIP-712 USDC payment authorization on Base.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "_file_slug": {
   "type": "string"
  },
  "_route_slug": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/wintergreen-x402-pricing-strategy-knowledge-endpoint-0be44d7b/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)