why dont people use the *.json api to make working (read only) third party apps

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what's the point of a read only one

you can do that in a read write one though

a read write one is basically impossible with new api changes tho

what’s the *.json api?

add .json to (most) reddit pages. like https://reddit.com/r/egg_irl.json

returns all of the important data about the page in only somewhat messy json format without any authentication required.

ive heard that theres some rate limit but in my experience its generous enough that a simple third party app can work without any major problems and even if its not afaik the entire rate limit can be bypassed by adding a brower-like user agent string.

imo this should be good enough to make a simple third party app

can confirm, it can be bypassed with a different UA.