{"uid":"cap_-qYlbs5j6qbZfVIcAIHL5","slug":"halowerk-land-compare-topsoil-nitrogen-two-point-comparison-dabd1abf","name":"HALOWERK Land Compare – Topsoil Nitrogen Two-Point Comparison","description":"Measures topsoil nitrogen for exactly two European coordinates with one method and reports the signed difference and winner where meaningful.","url":"https://landvergleich.halowerk.com/v1/compare-two-soil-nitrogen","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"locations":{"type":"array","items":{"type":"object","required":["longitude","latitude"],"properties":{"name":{"type":"string","maxLength":60,"minLength":1},"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."}},"additionalProperties":false},"maxItems":2,"minItems":2}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.006","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":"$0.006/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.006","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.006","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_wTeYdZQVTRggrsIL2-ao6","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.006","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Measures topsoil nitrogen for exactly two European coordinates and returns the signed difference, absolute values, and a winner designation.","exampleAgentPrompt":"Compare the topsoil nitrogen levels between my two candidate farm plots — one near Paris at latitude 48.85, longitude 2.35 and one near Warsaw at latitude 52.23, longitude 21.01 — and tell me which has higher nitrogen and by how much.","exampleUseCases":[{"title":"Farm site selection by soil fertility","prompt":"I'm deciding between two fields for a new crop rotation project — one in northern Germany at 53.55 latitude, 9.99 longitude and one in central France at 46.60 latitude, 1.88 longitude. Which one has higher topsoil nitrogen and what's the difference?"},{"title":"Comparing rewilding plots for ecological restoration","prompt":"We're evaluating two candidate rewilding areas — site A in southern Spain at 37.39 latitude, -5.99 longitude and site B in northern Italy at 45.46 latitude, 9.19 longitude. Can you check which one has better topsoil nitrogen levels?"},{"title":"Due diligence on agricultural land purchase","prompt":"Before we finalize a land purchase, compare the topsoil nitrogen of the plot we're buying near Krakow at 50.06 latitude, 19.94 longitude against our existing field near Poznan at 52.41 latitude, 16.93 longitude — which wins and by how much?"}],"resultDescription":"Returns topsoil nitrogen measurements for both input coordinates, the signed numeric difference between them, and a designation of which location has the higher nitrogen value (the 'winner') where meaningful.","failureModes":["Coordinates outside European coverage bounds (lat 34–72.5, lon -31.5–40.5) return validation error","Fewer or more than exactly two locations in the array returns a schema validation error","Invalid or non-numeric coordinate values cause a 400-level error","Coordinates in ocean or non-soil areas may return null or no-data responses","Service unavailability may return 5xx errors"],"whenToPreferThis":"Use this endpoint when you need a direct, point-to-point topsoil nitrogen comparison for exactly two European locations. It is purpose-built for binary land comparisons with a signed difference and explicit winner — ideal for agricultural site selection, land due diligence, or ecological suitability assessments within Europe. Choose sibling endpoints for other soil metrics (CEC, texture, built-up share) or for ranking more than two sites.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T00:34:11.591Z","isFirstParty":false}