{"uid":"cap_hpX-6QJMFK6fprTACfQ9O","slug":"halowerk-europe-land-maximum-slope-parcel-polygon-49e8a012","name":"HALOWERK Europe Land – Maximum Slope (Parcel Polygon)","description":"Maximum adjacent-cell surface gradient across the analysis grid. The service evaluates the bounded polygon supplied by the caller and returns standardized units across all 30 covered countries.","url":"https://euroland.halowerk.com/v1/europe-max-slope-parcel","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"polygon":{"type":"array","items":{"type":"array","items":[{"type":"number","maximum":40.5,"minimum":-31.5},{"type":"number","maximum":72.5,"minimum":34}],"maxItems":2,"minItems":2,"additionalItems":false},"maxItems":100,"minItems":3,"description":"WGS84 polygon ring. The closing coordinate is optional; maximum span is 0.25 degrees."}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.006","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":"$0.006/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.006","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.006","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_lFsi5nc01wAtiov0-jdYt","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.006","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Computes the maximum adjacent-cell surface gradient (steepest slope) across a user-supplied WGS84 polygon parcel within Europe, returning a standardized value across 30 covered countries.","exampleAgentPrompt":"What's the maximum slope across this land parcel I'm looking at in the Netherlands? The polygon vertices are [4.85, 52.37], [4.86, 52.37], [4.86, 52.38], [4.85, 52.38].","exampleUseCases":[{"title":"Pre-purchase land suitability check","prompt":"Before I buy this plot in Bavaria, can you check the maximum slope across the parcel? The boundary corners are [11.52, 48.10], [11.53, 48.10], [11.53, 48.11], [11.52, 48.11]."},{"title":"Renewable energy site screening","prompt":"We're evaluating a field in southern Spain for a solar farm — can you tell me the steepest slope inside this polygon: [−4.20, 37.85], [−4.19, 37.85], [−4.19, 37.86], [−4.20, 37.86]? We need it to be relatively flat."},{"title":"Agricultural drainage planning","prompt":"For this farmland parcel in Poland with corners at [20.10, 52.20], [20.11, 52.20], [20.11, 52.21], [20.10, 52.21], what is the maximum terrain gradient so I can plan drainage infrastructure?"}],"resultDescription":"A single standardized numeric value representing the maximum adjacent-cell surface gradient (steepest slope) found within the submitted polygon parcel, expressed in consistent units across all 30 covered European countries.","failureModes":["Polygon spans more than 0.25 degrees — request rejected with validation error","Fewer than 3 coordinate pairs supplied — invalid polygon error","Coordinates fall outside the European coverage extent (lon: −31.5 to 40.5, lat: 34 to 72.5) — out-of-coverage error","Malformed coordinate array structure — schema validation error","Network timeout or service unavailability — 5xx error response"],"whenToPreferThis":"Choose this endpoint when you need the steepest terrain gradient within an arbitrarily shaped land parcel (polygon) rather than a fixed-radius circular buffer or point sample. It is ideal for due-diligence workflows, construction feasibility, agricultural suitability, or renewable energy site assessment across any of the 30 covered European countries, and when you need a single worst-case slope value rather than a mean or distribution.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T13:08:47.956Z","isFirstParty":false}