{"uid":"cap_nBGFnGHqOk_57AgZxsGKW","slug":"halowerk-eastern-land-hungary-mean-first-order-surface-slope-2e3a4618","name":"HALOWERK Eastern Land – Hungary Mean First-Order Surface Slope","description":"Mean first-order surface gradient across the analysis grid. The coordinate is validated against the Natural Earth boundary for Hungary; results outside it are rejected before payment.","url":"https://ostland.halowerk.com/v1/hu-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_OlnFM8spgIpFkZBKNU1Ji","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 WGS84 coordinate validated to fall within Hungary's boundaries.","exampleAgentPrompt":"What's the mean surface slope at latitude 47.5 and longitude 19.05 in Hungary? I need the first-order gradient value for that location.","exampleUseCases":[{"title":"Agricultural land suitability assessment","prompt":"I'm evaluating farmland near Budapest — can you get me the mean surface slope for latitude 47.4 and longitude 19.1 so I know if the terrain is flat enough for mechanized farming?"},{"title":"Construction site terrain check","prompt":"Before we finalize a building site in Hungary at 47.8 latitude and 18.6 longitude, can you pull the average surface gradient to assess slope risk?"},{"title":"Renewable energy site screening","prompt":"I'm scouting solar panel locations in Hungary — what's the mean first-order slope at latitude 46.9, longitude 20.2? I need it to estimate panel tilt suitability."}],"resultDescription":"A numeric value representing the mean first-order surface gradient (slope) computed across the analysis grid for the queried coordinate. Coordinates outside Hungary's Natural Earth boundary are rejected before payment is processed.","failureModes":["Coordinate outside Hungary boundary: request rejected before payment, returns boundary validation error","Coordinate outside European coverage bounds (lat 34–72.5, lon -31.5–40.5): rejected with schema validation error","Missing or malformed latitude/longitude: returns input validation error","Payment failure via x402 protocol: request not processed"],"whenToPreferThis":"Use this endpoint when you need the mean first-order surface gradient specifically for a location within Hungary, and need boundary validation guarantees before incurring payment. Prefer this over generic elevation APIs when you specifically need slope (gradient) rather than raw elevation, and when Hungary-specific coverage and Natural Earth boundary enforcement is required.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T13:12:53.917Z","isFirstParty":false}