look up openaq v3 monitoring locations and fetch their latest sensor measurements
domain: openaq.org · 6 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗
Steps
Sign up at explore.openaq.org/register to get an OpenAQ API key
Call GET https://api.openaq.org/v3/locations (optionally filtered by coordinates/radius) or GET /v3/locations/{locations_id} to find a location and its ID
Send the API key in the X-API-Key request header on every call
Call GET https://api.openaq.org/v3/locations/{locations_id}/latest to get the most recent value from every sensor at that location
Use the limit and page query params (limit default 100) if a location has many sensors
Watch the x-ratelimit-remaining/x-ratelimit-reset response headers to avoid hitting the rate limit
Known gotchas
Requests without a valid X-API-Key header are rejected with 401 Unauthorized
Free tier is capped in requests per minute/hour; repeated overages can lead to a temporary or permanent ban
/latest returns only the newest value per sensor, not a time series — use the sensor measurements endpoint for history
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