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

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

what is the “post_action_type_id”?

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

Comment liker un post spécifique via l'API ?

Falco (Falco) Avril 20, 2022, 3:58 2

Sujet		Réponses	Vues
Getting who liked a post from the API Development	7	2867	Mai 18, 2022
Get number of likes for a single post? Development rest-api	7	2067	Avril 19, 2023
How to unlike a topic or post Development rest-api	6	448	Juin 24, 2024
Discourse Likes API Development rest-api	6	1252	Décembre 16, 2022
How to get the likers of the topic with api Support	6	1549	Juin 8, 2024