{"uid":"cap_0CWWF5PdEAXmFftgAXDDi","slug":"wintergreen-x402-trust-feed-3f19a396","name":"Wintergreen x402 Trust Feed","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/feed?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"format":{"enum":["json"],"type":"string","description":"Optional response format hint (json). No required inputs."}}},"responseSchema":{},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","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":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_gEiDEpsgvDNCvyOnDLQiz","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns a verified trust feed of x402 endpoint verification scores and P2D badges for payment-gated API discovery.","exampleAgentPrompt":"Pull the Wintergreen x402 trust feed so I can see which payment-gated endpoints have verified P2D badges and what their trust scores look like — return it as JSON.","exampleUseCases":[{"title":"Vetting x402 endpoints before payment","prompt":"Before I send USDC to any of these x402 endpoints, pull the Wintergreen trust feed and tell me which ones have P2D badges and decent trust scores."},{"title":"Auditing crypto API marketplace listings","prompt":"Get the Wintergreen x402 trust feed in JSON format so I can audit which bazaar-listed endpoints are verified and which ones look sketchy."},{"title":"Building an x402 endpoint directory","prompt":"Fetch the Wintergreen trust feed for me — I'm compiling a curated list of reliable x402 payment-gated APIs and need the verification and badge data."}],"resultDescription":"A structured feed of x402 endpoint trust scores and P2D verification badges, indicating which payment-gated endpoints have been validated by Wintergreen's trust-scoring system. Response format can be requested as JSON via the optional format parameter.","failureModes":["HTTP 402 returned if USDC micropayment ($0.01 on Base) has not been submitted — agent must sign EIP-712 TransferWithAuthorization and retry with X-PAYMENT header","Empty or malformed response schema — endpoint does not publish a defined response schema so output structure may vary","Payment address mismatch — sending USDC to wrong address results in failed authorization","Base network congestion causing payment confirmation delay"],"whenToPreferThis":"Choose this endpoint when an agent needs to evaluate the trustworthiness of x402-protocol payment-gated APIs before committing funds, or when building discovery tooling that needs verified P2D badge data. It is specifically designed for x402 ecosystem trust verification, not general API monitoring or crypto trading signals.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-25T07:26:04.065Z","isFirstParty":false,"canonicalSlug":"wintergreen-x402-trust-feed-3f19a396"}