DC Hub
Environment
Live data on data-center facilities, power markets, grid telemetry, and fiber infrastructure
No keyCORSHTTPS
PM25.in
Air quality of China
Checked 4 days ago: not responding
API key
Required
HTTPS
Not supported
Browser calls
No, needs a proxy
Status
Failing · 0/100
What our checks found
- Health score
- 0/100
- Reliability
- 0%
- Average latency
- 988ms
Last checked 2026-09-18. Measured independently, not self-reported by the provider.
How to call it
A starting template for PM25.in. Replace ENDPOINT with the path from the official documentation, which we link above rather than guess at.
# Requires an API key. Check the docs for whether it goes in a header or a query parameter.
curl -s "http://www.pm25.in/ENDPOINT" \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Accept: application/json"This API does not send CORS headers, so a browser will block a direct call from your front end. Call it from your server, or put a small proxy in front of it.
This API is served over plain HTTP. Browsers block HTTP requests made from an HTTPS page, so you will need a server-side call.
Where this listing comes from
Aggregated from one public source (public-apis), then normalised and checked by us. If something here is wrong, tell us and we will correct it.
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Environment
Ocean wave height, swell, sea temperature and marine weather data
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PM25.in — common questions
Answered from what our own scheduled checks found, not from the provider's marketing.
Is PM25.in free to use?
PM25.in is listed in our free catalogue, but it requires an API key, so you will need to register before your first call. Providers frequently reserve higher limits and commercial use for paid plans.
Does PM25.in need an API key?
Yes. PM25.in authenticates with an API key. Keep it server-side rather than in browser code, because anything in your frontend bundle is readable by anyone who opens developer tools.
Can I call PM25.in from browser JavaScript?
Not directly. PM25.in did not return CORS headers when we checked, so the browser will block your page from reading the response even though the request itself succeeds. Call it from a server, or put a small proxy in front of it.
Is PM25.in still working?
Not at our last check on 2026-09-18. PM25.in did not respond successfully, which is why it is marked as down here. This may be temporary; we re-check on a schedule and the badge above reflects the most recent run.
Is PM25.in available over HTTPS?
No. PM25.in was only reachable over plain HTTP when we checked. Browsers block HTTP requests made from an HTTPS page, so this will fail in production unless you call it from a server instead.