District of Columbia Open Data vs ONS
Same instrument, two spec sheets — measured, not claimed.
District of Columbia Open Data vs ONS: common questions
Which is more reliable, District of Columbia Open Data or ONS?
Both are neck-and-neck — District of Columbia Open Data and ONS each measure 100% uptime over 90 days on our probe schedule. Reliability here is verified from our own scheduled checks; use the 30-day bars above to see which has been steadier lately.
Which is faster, District of Columbia Open Data or ONS?
ONS has the lower median latency in our checks — District of Columbia Open Data responds in 852 ms versus ONS at 732 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 District of Columbia Open Data and ONS need an API key?
Neither needs a paid key — District of Columbia Open Data is callable with no signup, and ONS is callable with no signup. Both are quick to prototype with; rate limits still apply.
Can I call District of Columbia Open Data and ONS from the browser?
Yes — both District of Columbia Open Data and ONS send CORS headers over HTTPS, so front-end code can fetch either directly with no backend proxy. That makes them easy to swap in a client-side app while you compare responses.
Are District of Columbia Open Data and ONS free for commercial use?
District of Columbia Open Data has unclear commercial terms, and ONS 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.