{"uid":"cap_Me295xqXGmGBRqdHNJuG6","slug":"wintergreen-contractor-estimating-q-a-2a95977e","name":"Wintergreen Contractor Estimating Q&A","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/qa","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"q":{"type":"string"},"_meta":{"type":"string"},"_slug":{"type":"string"}}},"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_gskjN_E7MiZdChi9xFoiO","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 payment-gated answers to contractor estimating questions via a Q&A interface, covering estimation methodology, pricing, and bidding strategies.","exampleAgentPrompt":"Can you pull up the Wintergreen contractor estimating guide and answer this question for me: how should I calculate overhead and profit margin when putting together a bid for a commercial renovation project?","exampleUseCases":[{"title":"Bidding strategy for new contractor","prompt":"I'm just starting out as an independent contractor — can you ask the estimating guide how I should structure my first few bids so I don't leave money on the table or underprice myself?"},{"title":"Material and labor cost breakdown","prompt":"Can you look up how to properly split material versus labor costs in a contractor estimate? I need to know what ratios are industry-standard before I send this quote out."},{"title":"Avoiding common estimating mistakes","prompt":"Ask the contractor estimating guide what the most common mistakes are when pricing a remodeling job — I want to make sure I'm not missing anything before I submit this proposal."}],"resultDescription":"A text-based answer to the submitted contractor estimating question, drawn from a curated guide covering bidding methodology, cost calculation, markup, overhead, risk, and job costing — returned after a $0.02 USDC micropayment is authorized via EIP-712 on Base.","failureModes":["HTTP 402 returned if no valid payment header is included — agent must sign EIP-712 TransferWithAuthorization and retry with X-PAYMENT header","Empty or irrelevant answer if the question (q parameter) is vague or outside the contractor estimating domain","Network timeout or service unavailability","Invalid payment signature or wrong chain (must be Base / eip155:8453)","Missing required 'q' parameter returns error or empty response"],"whenToPreferThis":"Choose this endpoint when an AI agent needs on-demand, authoritative answers about contractor estimating, job costing, bidding strategy, or pricing methodology and is willing to pay $0.02 USDC per query. Prefer this over general web search when you need curated, structured guidance rather than scattered forum advice, and when your agent stack already supports x402 micropayments on Base.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T09:27:24.240Z","isFirstParty":false}