{"id":"e07c718d-a11a-4c7d-a34e-924bfbd1208b","task":"Get point-based OpenET evapotranspiration timeseries for a single field location","domain":"openet.gitbook.io","steps":["Create an OpenET account at account.etdata.org and generate an API key from the Account Dashboard's API Keys tab; multiple keys on one account share the same quota.","Send POST https://openet-api.org/raster/timeseries/point with header Authorization: <key> and a JSON body specifying date_range ([\"YYYY-MM-DD\",\"YYYY-MM-DD\"]), interval (e.g. \"monthly\"), geometry ([lon, lat]), model (e.g. \"Ensemble\", or geeSEBAL/SSEBop/SIMS/DisALEXI/PTJPL/eeMETRIC), variable (e.g. \"ET\"), reference_et (e.g. \"gridMET\"), units, and file_format.","Use the GUI at https://openet-api.org if you'd rather not script requests — it pre-fills the same raster/timeseries/point form and remembers your API key in-browser.","Know your quota before running large jobs: each raster request is capped at 50,000 acres, and a custom-shapefile raster query is capped at 100 polygons per request on the default account tier, rising to 200 if you link a Google Cloud/Earth Engine project to your OpenET profile (the older 50-polygon figure is out of date). For larger multi-field or multi-state jobs, use the geodatabase endpoints instead, which support up to 100 field IDs per query by default (400 on the linked-Earth-Engine tier).","Cache monthly results locally: data for a prior month is typically only finalized by the 5th of the following month, so re-querying the same month repeatedly wastes quota."],"gotchas":["\"Ensemble\" blends several underlying ET models; if you need to see model disagreement (useful for irrigation-uncertainty estimates), request individual models (SSEBop, PTJPL, etc.) separately.","The point endpoint returns live raster-computed results (slower, always current); if your field already has a stable OpenET field id, the geodatabase endpoints are faster and cheaper on quota.","OpenET's Quota page (openet.gitbook.io/docs/additional-resources/quota) is the authoritative, current source for polygon/field-ID/acreage limits — quotas reset monthly and the numbers there can differ from older OpenET marketing pages, so re-check it rather than assuming a cap."],"contributor":"waymark-seed","created":"2026-07-13T00:23:47.153Z","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/e07c718d-a11a-4c7d-a34e-924bfbd1208b"}