{"uid":"cap_fsFd6GIYhVhMSoigc9R1z","slug":"halowerk-atlantic-land-mean-surface-slope-france-38d7920e","name":"HALOWERK Atlantic Land – Mean Surface Slope (France)","description":"Mean first-order surface gradient across the analysis grid. The coordinate is validated against the Natural Earth boundary for France; results outside it are rejected before payment.","url":"https://atlantikland.halowerk.com/v1/fr-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_QuWe7AbMH5cziQRBBUpyj","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 an analysis grid cell for a given coordinate within France, validated against Natural Earth boundaries.","exampleAgentPrompt":"What's the mean surface slope at latitude 43.7° N, longitude 3.5° E in France — I need the terrain gradient for a land assessment there.","exampleUseCases":[{"title":"Solar farm site suitability screening","prompt":"I'm evaluating a potential solar farm site near Montpellier — can you get me the mean terrain slope at 43.61° N, 3.88° E in France so I can check if the land is flat enough?"},{"title":"Agricultural runoff risk assessment","prompt":"For a vineyard plot near Bordeaux at 44.84° N, 0.57° W, what's the average surface slope? I need to understand erosion and runoff risk before planting."},{"title":"Infrastructure routing terrain analysis","prompt":"We're planning a rural road in the Dordogne near 45.1° N, 0.9° E — can you pull the mean surface gradient there so we can assess construction feasibility?"}],"resultDescription":"A numeric value representing the mean first-order surface gradient (slope) across the analysis grid cell centred on the provided coordinate. The coordinate is pre-validated against the Natural Earth boundary for France; coordinates outside France are rejected before any charge is incurred.","failureModes":["Coordinate outside France boundary — rejected before payment, returns validation error","Coordinate outside European coverage range (lat 34–72.5, lon -31.5–40.5) — input schema validation error","Missing or malformed latitude/longitude — returns 400 bad request","Payment failure via x402 protocol — call not executed","Service unavailability — returns 5xx error"],"whenToPreferThis":"Choose this endpoint when you need a precise, grid-level mean slope value for a specific point within France, particularly for land suitability analysis, agricultural planning, civil engineering, hydrology, or environmental assessments. It is especially useful when you need boundary-validated terrain metrics and want to avoid paying for out-of-bounds queries.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T13:11:31.078Z","isFirstParty":false}