{"uid":"cap_5ECxWdqMafojMlV08q1RU","slug":"halowerk-nordic-land-mean-surface-slope-iceland-e52b5b40","name":"HALOWERK Nordic Land – Mean Surface Slope (Iceland)","description":"Mean first-order surface gradient across the analysis grid. The coordinate is validated against the Natural Earth boundary for Iceland; results outside it are rejected before payment.","url":"https://nordland.halowerk.com/v1/is-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_QExcFFzPeg275-OAMtsxf","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 Iceland.","exampleAgentPrompt":"What's the mean surface slope at latitude 64.13, longitude -21.93 in Iceland? I need the terrain gradient for that coordinate.","exampleUseCases":[{"title":"Renewable energy site suitability assessment","prompt":"I'm evaluating a wind farm site in Iceland near latitude 65.2, longitude -18.5 — can you get me the mean surface slope there so I know if the terrain is suitable?"},{"title":"Hiking trail difficulty rating","prompt":"For a trail planning project in Iceland, I need the average terrain gradient at latitude 63.8, longitude -19.1 to estimate trail steepness."},{"title":"Agricultural land evaluation in Iceland","prompt":"Can you check the mean slope at coordinates 65.5 latitude, -17.8 longitude in Iceland? I need to assess whether the terrain is flat enough for farming."}],"resultDescription":"A numeric value representing the mean first-order surface gradient (slope) across the analysis grid for the queried coordinate. Coordinates outside Iceland's Natural Earth boundary are rejected before processing.","failureModes":["Coordinate outside Iceland's Natural Earth boundary — request rejected before payment","Latitude or longitude out of published European coverage range (lat 34–72.5, lon -31.5–40.5) — validation error","Missing or malformed latitude/longitude parameters — input schema validation failure","Payment failure via x402 protocol — request not processed"],"whenToPreferThis":"Use this endpoint when you need mean surface slope specifically for coordinates within Iceland, and require boundary-validated, per-call terrain gradient data. Prefer it over generic elevation APIs when you need a processed slope metric rather than raw elevation, and when Iceland-specific boundary validation is important for data quality.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T13:07:27.242Z","isFirstParty":false}