Connect MailerSend
You need API token. About two minutes.
1Get your API token
API token
mlsn.…- Open Integrations and click Manage next to MailerSend API.
- Click Create new token, name it and pick a domain.
- Choose Custom access and grant the least access available.
- Copy the token: it is shown only once.
The quota endpoint is free and sends nothing.
Open the pagehttps://app.mailersend.com/api-tokens
2Add it to CreditBar
- Open CreditBar from the menu bar and choose Settings, then Accounts.
- Click Add account and pick MailerSend.
- Paste the API token 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 MailerSend. Nothing passes through a CreditBar server.
3What it reads
- Reports
- requests left in the current period, and when it resets
- Calls
- https://api.mailersend.com/v1/api-quota
- Refreshes
- At most every 5 minutes
- API docs
- MailerSend reference, checked 2026-09-16
Counts API requests, not emails: one request can carry many recipients.