New answers tagged support
Refer to the Stack Exchange API, Authentication docs. It looks like you are trying to authenticate using either a server you do not control, or a local server that is not on the public internet. Crucial Points: Do not specify a redirect_uri to any server that you do not control!!! When you use something like redirect_uri=https://www.yahoo.com/, then a ...
I suspect some new throttling kicked in on Saturday. When I slightly increased the delay between page= queries, the problem went away.
The API is not a good tool for this (more below). Use the Stack Exchange Data Explorer (SEDE) for this kind of bulk analysis. For example, this SEDE query shows the number of unique users who asked and/or answered in the PHP tag: Unique, Overall, Active Users: 384,835 Active Question Askers: 256,140 Active Answerers: 209,108 ...
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