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Wintergreen x402 Compliance Knowledge Endpoint
x402
Wintergreen x402 Compliance 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).
Returns payment-gated knowledge content about x402 endpoint verification and compliance, accessible after a $0.50 USDC micropayment on Base.
Price / call$0.01
Success—
StatusDown
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 covering x402 endpoint verification standards, compliance criteria, and P2D trust badge information. The content is unlocked after the agent completes an on-chain USDC micropayment ($0.50) on Base and retries the request with the signed X-PAYMENT header.
Example use cases
Verify x402 API compliance rules
“Can you pull the Wintergreen x402 compliance knowledge article and tell me what criteria an endpoint needs to meet to be considered x402-verified?”
Learn about P2D trust badge system
“I want to understand how P2D trust badges work in the x402 ecosystem — fetch the Wintergreen compliance guide and summarize the badge-awarding criteria for me.”
Agent workflow x402 integration check
“I'm building an AI agent that calls payment-gated APIs — grab the Wintergreen x402 compliance reference so I can make sure my implementation follows the correct EIP-712 and retry-with-payment-header pattern.”
Technical details
Endpoint
GEThttps://x402.wintergreen.uk/api/v1/knowledge/x402-complianceWhen to prefer
Choose this endpoint when you need authoritative x402 protocol compliance documentation or P2D trust badge criteria and are operating an agent capable of making USDC micropayments on Base. It is the canonical reference for x402 verification standards published by the Wintergreen broker, making it preferable to general web searches when you need structured, curated compliance knowledge.
Side effects
- HTTP 402 returned if payment header is missing or invalid — agent must sign EIP-712 TransferWithAuthorization and retry
- Invalid or expired EIP-712 signature causes payment rejection
- Incorrect route or file slug returns 404 or empty response
- USDC balance insufficient on Base causes payment failure
- Network congestion on Base may delay payment confirmation
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| _file_slug | string | |
| _route_slug | string |
Output
Schema · Response
{}Tags
x402
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