Wie kann man einen bestimmten Beitrag über die API mögen?

Entwickler
1

Is there anything in the Discourse API that can help you like a post?

2

Yes, see How to reverse engineer the Discourse API and Discourse API Docs

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4

what is the “post_action_type_id”?

5

For like it is 2 as you can check via How to reverse engineer the Discourse API

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