DFlight API vs PM2.5 Open Data Portal
Same instrument, two spec sheets — measured, not claimed.
DFlight API vs PM2.5 Open Data Portal: common questions
Which is more reliable, DFlight API or PM2.5 Open Data Portal?
On our scheduled checks, PM2.5 Open Data Portal leads on measured uptime — DFlight API at 11.8% versus PM2.5 Open Data Portal at 100% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.
Which is faster, DFlight API or PM2.5 Open Data Portal?
DFlight API has the lower median latency in our checks — DFlight API responds in 319 ms versus PM2.5 Open Data Portal at 796 ms (P50). Tail latency (P95) is in the table above; for most workloads the median is the number that shapes how the API feels.
Do DFlight API and PM2.5 Open Data Portal need an API key?
Neither needs a paid key — DFlight API is callable with no signup, and PM2.5 Open Data Portal is callable with no signup. Both are quick to prototype with; rate limits still apply.
Can I call DFlight API and PM2.5 Open Data Portal from the browser?
Neither sends browser-friendly CORS headers reliably, so call DFlight API and PM2.5 Open Data Portal from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.
Are DFlight API and PM2.5 Open Data Portal free for commercial use?
DFlight API has unclear commercial terms, and PM2.5 Open Data Portal has unclear commercial terms. We track service terms and the data license as separate fields — see the Commercial use and Data license rows above, and confirm both before shipping either in a paid product.