{"uid":"cap_CwsyOKlbyP-dVlWwgG3-6","slug":"halowerk-nordic-land-iceland-surface-soil-nitrogen-187c81b4","name":"HALOWERK Nordic Land – Iceland Surface Soil Nitrogen","description":"Mean SoilGrids total nitrogen for the 0-5 cm layer. 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-soil-nitrogen","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":"0.004","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":"$0.004/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.004","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.004","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_ZggNpNceT2OtvLxZJp4pD","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.004","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns the mean total nitrogen concentration (g/kg) in the 0–5 cm soil layer for a given coordinate within Iceland, sourced from SoilGrids.","exampleAgentPrompt":"What's the mean total nitrogen in the top 5 cm of soil at latitude 64.13, longitude -21.93 in Iceland? I need the SoilGrids figure for that surface layer.","exampleUseCases":[{"title":"Farm soil fertility assessment","prompt":"I'm evaluating agricultural land near Selfoss, Iceland — can you pull the mean topsoil nitrogen for latitude 63.93, longitude -20.99 so I can assess its fertility potential?"},{"title":"Environmental baseline survey","prompt":"I need to establish a soil nitrogen baseline for a nature reserve in northern Iceland at lat 65.68, lon -18.10 — can you get the SoilGrids total nitrogen value for the 0–5 cm layer there?"},{"title":"Geospatial data enrichment pipeline","prompt":"For my dataset of Icelandic field plots, start with the first point at latitude 64.45, longitude -22.15 — what is the mean total nitrogen in the surface soil layer according to SoilGrids?"}],"resultDescription":"A numeric value representing the mean total nitrogen concentration (g/kg) in the 0–5 cm soil layer at the requested coordinate, derived from SoilGrids global soil data, returned only if the coordinate falls within Iceland's Natural Earth boundary.","failureModes":["Coordinate outside Iceland boundary — request rejected before payment even if within broader European coverage bounds","Latitude or longitude outside the published European coverage range (lat 34–72.5, lon -31.5–40.5) — validation error","Missing required latitude or longitude field — schema validation failure","SoilGrids backend unavailable or returning no data for the queried cell — service error"],"whenToPreferThis":"Choose this endpoint when you need authoritative SoilGrids-derived total nitrogen data specifically for Iceland surface soils (0–5 cm), especially in agentic pipelines that require per-point micropayment via x402. It is Iceland-scoped and boundary-validated, making it more reliable than calling a generic soil API without geographic enforcement. Prefer it over broader European soil endpoints when your query is definitively inside Iceland and you want the boundary check as a safeguard.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T19:01:06.269Z","isFirstParty":false}