How to integrate trello to basecamp?

[Network Capermint]

Hello, I want to integrate trello account on my basecamp. I've made webhook to trello and added in my basecamp. Now whatever i am trying to add on basecamp, it is not reflecting on my trello account.

https://api.trello.com/1/actions/5f6ad3c63cae6f17af91632d?key=21fbfc1a084c6c2adce8b7de5d5a3f0c&token=330efad8f2e6f3269790c48e94e3c1523161327563b82d5ae64ae4510cdcba53

[Soumyadeep Mandal]

Hi @Network Capermint ,

You can choose any of the automation tools which support multi-platform to sync your data/workflow. 

Visit HERE

[Network Capermint]

Hi, @Soumyadeep Mandal that's the other option but i want to use webhook. 

curl -X POST -H "Content-Type: application/json" \
https://api.trello.com/1/tokens/{APIToken}/webhooks/ \
-d '{
  "key": "{APIKey}",
  "callbackURL": "http://www.mywebsite.com/trelloCallback",
  "idModel":"4d5ea62fd76aa1136000000c",
  "description": "My first webhook"
}'

 What will be the callback URL?