{"uid":"cap_j_lF5nUX_LfJLQScpOiLi","slug":"halowerk-atlantic-land-netherlands-mean-surface-slope-24f93c9c","name":"HALOWERK Atlantic Land – Netherlands Mean Surface Slope","description":"Mean first-order surface gradient across the analysis grid. The coordinate is validated against the Natural Earth boundary for Netherlands; results outside it are rejected before payment.","url":"https://atlantikland.halowerk.com/v1/nl-mean-slope","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"latitude":{"type":"number","maximum":72.5,"minimum":34,"description":"WGS84 latitude inside the published European coverage."},"longitude":{"type":"number","maximum":40.5,"minimum":-31.5,"description":"WGS84 longitude inside the published European coverage."}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.003","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":"$0.003/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_e8PBZy6Go9jW0TkWZVwzu","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.003","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns the mean first-order surface gradient (slope) for a given WGS84 coordinate, validated against the Natural Earth boundary for the Netherlands.","exampleAgentPrompt":"What is the mean surface slope at latitude 52.37 and longitude 4.90 in the Netherlands? I need the first-order terrain gradient for that location.","exampleUseCases":[{"title":"Construction site terrain assessment","prompt":"Can you get me the mean surface slope for the coordinates 52.1 latitude, 5.1 longitude in the Netherlands? I need to know how steep the terrain is before planning a building project there."},{"title":"Agricultural drainage suitability check","prompt":"What's the average land gradient at 51.85 latitude and 5.65 longitude in the Netherlands? I'm evaluating whether this farmland has enough slope for natural drainage."},{"title":"Flood risk terrain analysis","prompt":"Pull the mean first-order surface slope for latitude 52.55, longitude 4.75 in the Netherlands — I'm assessing low-gradient areas that might be prone to water pooling."}],"resultDescription":"A numeric value representing the mean first-order surface gradient (slope) across the analysis grid cell covering the requested coordinate. Coordinates outside the Netherlands boundary are rejected before any payment is charged.","failureModes":["Coordinate outside Netherlands boundary: request rejected before payment with a validation error","Coordinate outside European coverage bounds (lat 34–72.5, lon -31.5–40.5): rejected at schema validation","Malformed or missing latitude/longitude fields: schema validation error","Payment failure via x402 protocol: request not processed","Server-side computation error for edge-case grid cells near coastlines or borders"],"whenToPreferThis":"Choose this endpoint when you need the mean surface terrain slope for a specific point within the Netherlands, especially for land use analysis, construction planning, hydrology, or agricultural assessments. It is purpose-built for the Netherlands with boundary validation, making it more reliable than generic global elevation APIs for Dutch coordinates.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-13T07:02:36.268Z","isFirstParty":false}