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Locus Large-Site Satellite Change (Sentinel-2 Before/After PNGs)
x402
Locus Large-Site Satellite Change (Sentinel-2 Before/After PNGs) is a paid API for AI agents from api.locus.report, paid per call via x402, $0.15/call, status unknown (last checked 2026-09-14).
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.
Price / call$0.15
Success—
StatusUnknown
How this service works
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.
Output
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.
Example use cases
Construction progress monitoring
“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.”
Mining or land disturbance site check
“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.”
Agricultural or deforestation context
“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.”
Technical details
Endpoint
POSThttps://api.locus.report/api/locus-large-site-satellite-changeWhen to prefer
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.
Side effects
- 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
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| bbox | array | |
| size | integer | |
| afterDate | string | |
| areaLabel | string | |
| beforeDate | string | |
| windowDays | integer | |
| maxCloudCoverage | integer |
Output
Schema · Response
{
"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"
}
}Tags
x402
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