Hello. Does the OSRS API expose any information about the buy limit for items in the GE? I haven't seen any examples of this but there are a couple of websites out there that have this information available. Where are they gathering it from?
As far as I know, the API doesn't list buy limits; any buy limits on websites are user supplied (that is, a player purchased the item, hit the limit, and recorded it on the website).
The GE API for RS is the same as the one for OS (different endpoint for the different game, same format of data). For each item, this is the information provided.