Connect Mailchimp
You need API key. About two minutes.
1Get your API key
API key
…-us14- Click your profile icon and choose Profile.
- Open the Extras drop-down and choose API keys.
- Click Create A Key, name it, then click Generate Key.
- Click Copy Key to Clipboard: the key is not shown again.
Mailchimp, Account, Extras, API keys. Paste the whole key including the dash and the data centre at the end: that suffix is what says which server the account lives on.
Open the pagehttps://admin.mailchimp.com/account/api/
2Add it to CreditBar
- Open CreditBar from the menu bar and choose Settings, then Accounts.
- Click Add account and pick Mailchimp.
- Paste the API key into the matching field, and give the account a label you will recognise.
- Click Test connection, then Add. Numbers appear in the menu bar within a minute.
Keys are stored in your Mac's Keychain and only ever sent to Mailchimp. Nothing passes through a CreditBar server.
3What it reads
- Reports
- audience size, plan type and the account. The us14 part is your own data centre
- Calls
- https://us14.api.mailchimp.com/3.0/
- Refreshes
- At most every 15 minutes
- API docs
- Mailchimp reference, checked 2026-09-18
Contacts across every audience, which is what Mailchimp bills on. It publishes no plan allowance here, so this is a count rather than a percentage.