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Create cards with long description without exceeding URL length


So I'm using the API to create a trello card and I want to set a quite large description.

The way the endpoint works is that, despite it being a POST request, all the fields for the card (including non-card related like key and token) are query parameters.

That leads to a very long URL which of course fails.


Any way we can send the description field in the post body to avoid this issue?



2 answers

1 accepted

1 vote
Answer accepted
Manu Atlassian Team Nov 27, 2019

Hi again Snir,

I'm just posting my reply from our thread together here so others can see how to format their call.


curl --request POST \
--url '' \
--header 'Content-Type: application/json' \
--data '{
"name": "Card Name",
"pos": "top",
"idList": "idLIST",
"desc": "When copying an existing card into a new card with idCardSource checklist items are always unchecked and due dates are never marked as complete regardless of their corresponding values in the source card."

Move your description from the url params to the body. e.g.:


def set_card_description(card_id, description):
      params = {
      'key': TRELLO_KEY,
      'token': TRELLO_TOKEN,

    body = {
      'desc': description

    r = requests.put(f'{card_id}', params=params, json=body)
    return r.json()


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