I am testing Trello API via Postman and I have a problem adding a comment to a card.
I'm submitting a PUT request to https://api.trello.com/1/cards/card id/actions/commentCard/comments?&key=my_key&token=my_token&text=comment, but I receive an error:

invalid value for idAction

Could someone point out what I'm doing wrong?
you try POST to 
https://api.trello.com/1/cards/cardID/actions/comments?text=yourComment&key=apiKey&token=trelloToken
where you must change the variables cardI, yourComment, apiKey and trelloToken to your variables
How to add a comment to Trello card via API calls?