paginate openaq v3 sensor measurement history and check data licensing before reuse
domain: openaq.org · 6 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗
Steps
Call GET https://api.openaq.org/v3/sensors/{sensors_id}/measurements with the X-API-Key header, and optional datetime_from/datetime_to filters
Set the limit query param (default 100, maximum 1000) and page to paginate through results
Read meta.found in the JSON response to know the total record count and how many pages remain
For large or unbounded queries, narrow with datetime_from/datetime_to so the underlying database can use indexes efficiently
Look up the record's license via GET /v3/licenses/{licenses_id} to check commercialUseAllowed, attributionRequired, and shareAlikeRequired before redistributing
Include attribution to OpenAQ and the underlying data provider as required by the applicable license
Known gotchas
limit tops out at 1000 per page — larger pulls must be paginated with the page param
Paging over an unfiltered date range is slow; add a datetime_from/datetime_to window to speed it up
Licenses are per-record/provider, not blanket — some are CC BY 4.0 (attribution required, some share-alike) but others differ, so check before reuse
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