{"uid":"cap_aK9hnagVmHQMH0doQdWFd","slug":"wintergreen-x402-trust-check-03f6a738","name":"Wintergreen x402 Trust Check","description":"Payment-gated crypto trading intelligence for AI agents.\n    \n## Categories\n- **Hyperliquid Signals**: Real-time funding divergence, lead-lag correlation, liquidation clusters, session volume area levels\n- **Quant Methodology**: Backtesting walk-forward validation, strategy generation with kill battery (19 rules), risk management with Kelly sizing, regime detection, execution frameworks, agent orchestration\n- **Market Insights**: 22 crypto microstructure observations — funding, liquidation, orderbook, regime, flow, anomaly\n- **Power Markets**: ERCOT field guide, merit-order model, duck curve analysis\n- **Career Guides**: Firefighter oral board prep, medical coding, ATSA, contractor estimating\n- **Trust Scoring**: x402 endpoint verification, P2D badges\n\n## Payment\nAll paid endpoints return HTTP 402 with USDC on Base (eip155:8453). \nSign EIP-712 TransferWithAuthorization and retry with X-PAYMENT header.\nPayTo: 0xAe9834d71F1Bd989A0dc17593451af823E31CeeD","url":"https://x402.wintergreen.uk/api/v1/trust/check?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"url":{"type":"string"}}},"responseSchema":{},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.002","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"down","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.002/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_nEEPJVttmjbpq4M9g4tlC","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.002","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Verifies whether a given URL is a legitimate, verified x402 payment-gated endpoint by checking its trust score and P2D badge status.","exampleAgentPrompt":"Can you check whether https://api.someservice.xyz/crypto/signals is a legitimate, verified x402 endpoint before I authorize any USDC payments to it?","exampleUseCases":[{"title":"Pre-payment endpoint due diligence","prompt":"Before my trading bot pays for signals from https://x402.sometrader.io/api/signals, can you verify that endpoint is trusted and has a valid P2D badge?"},{"title":"Screening unknown x402 APIs","prompt":"I found this x402 URL in a forum post — https://unknown-api.example.com/v1/data — can you check its trust score so I know if it's safe to integrate?"},{"title":"Agent fleet endpoint whitelisting","prompt":"I'm building an agent that auto-pays x402 APIs. Can you run a trust check on https://marketdata.cryptobroker.io/feed to decide whether to whitelist it?"}],"resultDescription":"Returns a trust assessment for the submitted URL, including a verification status indicating whether the endpoint is a recognized x402 provider, any P2D (Proved-to-Deliver) badge status, and a trust score derived from crawl sources such as x402scan and Coinbase-curated GitHub listings.","failureModes":["URL not found in any trust registry — returns low or zero trust score","Malformed or non-HTTP URL input causes validation error","Endpoint not yet indexed by x402scan or probe sources — result may be stale or absent","Payment of $0.002 USDC required; missing or invalid X-PAYMENT header returns HTTP 402","Network timeout reaching the Wintergreen trust service"],"whenToPreferThis":"Use this endpoint when an AI agent needs to vet an unknown x402 payment-gated API before committing USDC funds — especially useful in automated agent pipelines where arbitrary x402 URLs may be encountered and must be screened for legitimacy before payment. Prefer this over manual inspection when operating at scale or when the agent cannot otherwise verify P2D badge status.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-13T06:28:48.304Z","isFirstParty":false,"canonicalSlug":"wintergreen-x402-trust-check-03f6a738"}