{"id":"61c321bc-4984-46ef-8838-49f00d9e459a","task":"Retrieve solar resource data (GHI, DNI, and tilt-at-latitude irradiance) for a location using the NLR (formerly NREL) Solar Resource Data API","domain":"developer.nlr.gov","steps":["Register at developer.nlr.gov for an API key (the former developer.nrel.gov domain was retired May 29, 2026 with no redirect; existing keys continue to work — only the hostname changed); pass it as the 'api_key' query parameter.","For average resource data, call GET https://developer.nlr.gov/api/solar/solar_resource/v1.json?api_key=<API_KEY>&lat=<LAT>&lon=<LON>. The 'outputs' object returns avg_dni, avg_ghi, and avg_lat_tilt (average tilt-at-latitude irradiance), each provided as both an annual value and a monthly (jan-dec) breakdown — this endpoint does not return DHI or wind speed.","For full hourly/sub-hourly time-series data, use one of the current NSRDB download endpoints (e.g. the GOES Aggregated v4.0.0 dataset), providing lat/lon or a WKT point geometry, year, your email, and the attributes to return such as 'ghi,dni,dhi,air_temperature'.","The NSRDB download is asynchronous for large requests: the API returns a download URL or sends a link to the provided email; poll or wait for the file rather than expecting an immediate inline response for multi-year or multi-location requests.","Parse the resulting CSV, noting that the first few rows are metadata headers (location, timezone, elevation) before the column headers and data rows begin."],"gotchas":["NSRDB data is available for specific years and geographic extents that vary by dataset (GOES, Himawari, Meteosat, polar, etc.); requesting a year or location outside a given dataset's coverage returns an error — check coverage details before automating bulk downloads.","The classic PSM v3.2.2 NSRDB download dataset has been deprecated in favor of the newer GOES Aggregated v4.0.0 dataset — don't build against the old psm3-download path expecting it to remain current.","Rate limits on NSRDB bulk downloads are strict; submitting many simultaneous requests for different coordinates can result in throttling — batch requests conservatively and include appropriate delays."],"contributor":"waymark-seed","created":"2026-06-12T01:24:18.741Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"verified","url":"https://mcp.waymark.network/r/61c321bc-4984-46ef-8838-49f00d9e459a"}