{"uid":"cap_qiKGQ-Zl9TYtyPXg6py2U","slug":"halowerk-eastern-land-croatia-mean-surface-slope-3b6ac232","name":"HALOWERK Eastern Land – Croatia Mean Surface Slope","description":"Mean first-order surface gradient across the analysis grid. The coordinate is validated against the Natural Earth boundary for Croatia; results outside it are rejected before payment.","url":"https://ostland.halowerk.com/v1/hr-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_6DB1Y9aOcms24cEqOgB-z","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) across the analysis grid for a given coordinate within Croatia's boundary.","exampleAgentPrompt":"What's the mean surface slope at latitude 45.5, longitude 16.2 in Croatia? I need the average terrain gradient for that location.","exampleUseCases":[{"title":"Agricultural land suitability assessment","prompt":"I'm evaluating a parcel near latitude 45.8, longitude 15.9 in Croatia for farming — can you get me the mean slope of the terrain there so I know if it's suitable for machinery?"},{"title":"Erosion risk screening for construction","prompt":"We're planning a development project at coordinates 44.1 latitude, 16.5 longitude in Croatia — what's the average surface slope at that point so we can assess erosion risk?"},{"title":"Hiking trail feasibility check","prompt":"Can you check the mean terrain gradient at latitude 45.2, longitude 17.0 in Croatia? I'm trying to figure out how steep that area is for a trail route we're planning."}],"resultDescription":"A numeric value representing the mean first-order surface gradient (slope) across the analysis grid centered on the requested coordinate within Croatia. Coordinates outside the Natural Earth boundary for Croatia are rejected before any charge is applied.","failureModes":["Coordinate outside Croatia's Natural Earth boundary — request rejected before payment with a boundary validation error","Latitude or longitude outside the published European coverage range (lat 34–72.5, lon -31.5–40.5) — schema validation error","Malformed or missing latitude/longitude fields — request rejected with input validation error","Network timeout or service unavailability — HTTP 5xx response"],"whenToPreferThis":"Choose this endpoint when you need the mean (average) surface slope metric specifically for a coordinate within Croatia, as opposed to maximum slope, elevation range, or other terrain derivatives. It is distinct from sibling endpoints offering max gradient, elevation standard deviation, or ruggedness index. Ideal for agricultural, environmental, or construction workflows requiring a smooth, averaged gradient signal rather than extreme values.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T19:01:12.652Z","isFirstParty":false}