I wish to add and remove group owners using the API. This is not documented in the api docs. Tracing the calls while logged in as admin, make user owner is PUT groups/ /owners with a payload of usernames=nikkilocke(note no admin!) Remove user from owners is DELETE admin/groups/ /owners with a payload of user_id= Studying the source code shows: def group_add_owners(group_id, args) args = API.params(args).required(:usernames).to_h put("/admin/groups/#{group_id}/owners.json", group: args) end def group_remove_owners(group_id, args) args = API.params(args).required(:usernames).to_h delete("/admin/groups/#{group_id}/owners.json", group: args) end and this code doesn’t seem to have changed since 2023. I am running Discourse 3.4.7, and the add owners entry point in the source code gives a 404 error. Urls I have tried: PUT /groups/384/owners usernames=nikkilocke OK PUT /admin/groups/384/owners group[usernames]=nikkilocke 404 error DEL /admin/groups/384/owners group[usernames]=nikkilocke OK DEL /admin/groups/384/owners user_id = 12 OK Can anyone advise me what’s going on, and which urls to use for this, please?

[image] Nikki_Locke: goup I assume that that’s a typo and not the cause of your error?

[image] Nikki_Locke: I wish to add and remove group owners using the API. This is not documented in the api docs. The best and surest documentation for the API is Reverse engineer the Discourse API [image] Nikki_Locke: the add owners entry point in the source code gives a 404 error. Are you sure that you have a valid API key and that you are passing it correctly? A 404 error is expected if you are not properly authenticated. Are you able to do any requests that require authorization?

As I said in the original post, 3 out of the 4 possibilities work fine (with the same API key).

[image] Nikki_Locke: As I said in the original post, 3 out of the 4 possibilities work fine Ah. Sorry. The “OK” at the end of the line was somehow too subtle for me to follow. When I add an owner, I see this PUT request https://example.com/groups/75/owners.json with usernames= pfaffman123 in the form data. Did you follow the reverse engineering steps I linked to?

@Nikki_Locke were you able to resolve your issue?

Cannot fathom the API for adding and removing group owners

Product Support

NateDhaliwal (Nate Dhaliwal) August 20, 2025, 12:05pm 2

I assume that that’s a typo and not the cause of your error?

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Cannot fathom the API for adding and removing group owners

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