{"uid":"cap_cWkCIeobt35UNL7jTucVg","slug":"wintergreen-x402-contractor-estimating-guide-8b9391d0","name":"Wintergreen x402 Contractor Estimating Guide","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/knowledge/contractor-estimating","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"_meta":{"type":"string"},"_slug":{"type":"string"}}},"responseSchema":{},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","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":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_L2rGuREXE32t-m_qK_3_k","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns a payment-gated contractor estimating career guide covering bidding, pricing, and project estimation methodologies.","exampleAgentPrompt":"Can you pull up the contractor estimating guide — I need to learn how to properly price a remodeling job including labor, materials, and overhead? I'll pay the $2.50 USDC access fee.","exampleUseCases":[{"title":"New contractor learning to bid jobs","prompt":"I just started my own contracting business and I have no idea how to price jobs competitively — can you get me the contractor estimating guide so I can learn the right way to build a bid?"},{"title":"Calculating overhead and profit margins","prompt":"Help me understand how to factor overhead, labor burden, and profit margin into my construction estimates — grab the contractor estimating guide for me."},{"title":"Preparing a detailed project proposal","prompt":"I need to put together a professional estimate for a kitchen renovation client — can you pull up the contractor estimating guide so I can make sure I'm not missing anything?"}],"resultDescription":"A structured knowledge document covering contractor estimating principles, including bidding strategies, labor and materials pricing, overhead calculation, markup and profit margin guidance, and project estimation frameworks for trades professionals.","failureModes":["HTTP 402 returned if payment header is missing or invalid — must sign EIP-712 TransferWithAuthorization and retry with X-PAYMENT header","Payment address mismatch or incorrect USDC amount results in rejected transaction","Invalid or missing slug parameter may return empty or incorrect content","Network issues on Base (eip155:8453) chain can delay or fail payment settlement","Response schema is unspecified, so output format may vary"],"whenToPreferThis":"Choose this endpoint when an AI agent or user needs authoritative, curated guidance on contractor estimating, bidding, and pricing — particularly when other free resources lack depth or structure. Best suited for tradespeople, project managers, or learners who want a concise, pay-per-use reference without a subscription.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T00:40:46.535Z","isFirstParty":false}