Conducttr allows you to send Notes to Capsule with the Capsule Note content.
For this to work, you'll first need to give your Character a Capsule account.

Add Capsule Account

Your API token in Capsule can be found in My Preferences > API Authentication Tokens.

Once the account is setup, you can post Notes in the way you'd post any other content. Look for Capsule Note in the content drop-down.