{"uid":"cap_8q_Wp6-lyAXA8GS87xw65","slug":"locus-large-site-satellite-change-sentinel-2-before-after-pngs-a5568954","name":"Locus Large-Site Satellite Change (Sentinel-2 Before/After PNGs)","description":"Requires bbox [west,south,east,north] WGS84 and beforeDate/afterDate (YYYY-MM-DD, after later). No address input: use free locus_satellite_area_prepare first. Area 1-100 sq km; each side >=500 m; aspect <=8:1. Two dated Copernicus Sentinel-2 images, not detected change or building condition. Private, no-store, REST-only; no charge on source failure. npx @velinussage/locus-agent-skill add.","url":"https://api.locus.report/api/locus-large-site-satellite-change","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"bbox":{"type":"array"},"size":{"type":"integer","default":512,"maximum":1024,"minimum":256},"afterDate":{"type":"string","format":"date","pattern":"^(?:(?:\\d\\d[2468][048]|\\d\\d[13579][26]|\\d\\d0[48]|[02468][048]00|[13579][26]00)-02-29|\\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\\d|30)|(?:02)-(?:0[1-9]|1\\d|2[0-8])))$"},"areaLabel":{"type":"string","maxLength":120,"minLength":1},"beforeDate":{"type":"string","format":"date","pattern":"^(?:(?:\\d\\d[2468][048]|\\d\\d[13579][26]|\\d\\d0[48]|[02468][048]00|[13579][26]00)-02-29|\\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\\d|30)|(?:02)-(?:0[1-9]|1\\d|2[0-8])))$"},"windowDays":{"type":"integer","default":30,"maximum":90,"minimum":7},"maxCloudCoverage":{"type":"integer","default":30,"maximum":60,"minimum":0}}},"responseSchema":{"type":"json","example":{"kind":"large_site_satellite_change_diagnostic","status":"not_configured","caveats":["No provider request was made."],"charged":false,"message":"Example diagnostic; the rollout is not configured.","generatedAt":"2026-09-09T00:00:00.000Z"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.15","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":"$0.15/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.15","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.15","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_2aqUU_YvuanmkDkMVSnQf","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.15","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns two dated Sentinel-2 Level-2A PNG images (before and after) for a caller-supplied bounding box, rendered via Copernicus, to provide visual area context for large sites.","exampleAgentPrompt":"Pull before-and-after Sentinel-2 satellite images for the site bounded by [-104.99, 39.73, -104.97, 39.75], using 2024-01-15 as the before date and 2024-07-15 as the after date, a 30-day search window, max 20% cloud cover, and label it 'Denver Industrial Parcel' at 512px resolution.","exampleUseCases":[{"title":"Construction progress monitoring","prompt":"Get me Sentinel-2 before-and-after images for the bounding box [-87.65, 41.85, -87.63, 41.87] with a before date of 2023-06-01 and after date of 2024-06-01, 45-day window, max 25% cloud cover, call it 'Chicago Logistics Hub' at 512 pixels — I want to see how much has been built."},{"title":"Mining or land disturbance site check","prompt":"Fetch Copernicus satellite imagery for the area [-110.5, 45.2, -110.4, 45.3] comparing 2022-09-01 to 2023-09-01 with a 30-day window and no more than 15% cloud coverage, labeled 'Montana Mine Site', so I can see changes in land disturbance."},{"title":"Agricultural or deforestation context","prompt":"Show me two dated Sentinel-2 PNG images for bounding box [-55.3, -3.8, -55.1, -3.6] — one around 2022-03-01 and one around 2023-03-01, 60-day window, up to 30% cloud cover, at 768 pixels — label it 'Amazon Farmland Parcel' so I can see how much forest cover has changed."}],"resultDescription":"A JSON diagnostic object with status, a 'kind' field ('large_site_satellite_change_diagnostic'), two dated Sentinel-2 Level-2A PNG image URLs or data (before and after), Copernicus catalogue candidate metadata, per-tile cloud cover percentages, caveats list, a 'charged' boolean, and a generatedAt timestamp. No change, damage, or condition claims are made by Locus; images are 10m/pixel area context only. Not charged if scene discovery or rendering fails.","failureModes":["Scene discovery fails (no suitable Sentinel-2 tiles found in window) — returns diagnostic with charged:false and caveats listing the failure","Cloud cover threshold too strict — no qualifying tiles returned within window","Bounding box too large (>100 km²) or too small (<1 km²) — validation error","Invalid date format or before/after date order incorrect — schema validation error","Rendering failure via Copernicus — diagnostic returned with charged:false","windowDays too short (under 7) or too long (over 90) — schema validation error","maxCloudCoverage exceeds 60 — schema rejection","Payment failure via x402 — 402 response before processing begins"],"whenToPreferThis":"Choose this endpoint when you need visual, satellite-based area context for a large site (1–100 km²) using official Copernicus Sentinel-2 data, particularly for before/after comparison across two dates. Best suited for due diligence, land use monitoring, construction tracking, environmental review, or any task requiring cloud-filtered, dated 10m-resolution imagery without making change or damage claims. Prefer this over commercial imagery APIs when Copernicus official catalogue sourcing and transparent cloud-cover filtering matter, and when cost-per-call pricing (only charged on success) is preferred.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T18:31:18.957Z","isFirstParty":false}