Connect Fly.io
You need Access token. About two minutes.
1Get your Access token
Access token
fm2_…- In a terminal, run fly tokens create readonly for a read-only org token.
- Or in the dashboard, pick your organization from the dropdown and click Tokens.
- Copy the whole token, including the fm2_ prefix.
Run `fly tokens create readonly` for a token that can read billing and nothing else, or take one from the dashboard under Tokens. It usually starts with fm2_.
Open the pagehttps://fly.io/user/personal_access_tokens
2Add it to CreditBar
- Open CreditBar from the menu bar and choose Settings, then Accounts.
- Click Add account and pick Fly.io.
- Paste the Access 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 Fly.io. Nothing passes through a CreditBar server.
3What it reads
- Reports
- credit balance, plan and billing status for each organization
- Calls
- https://api.fly.io/graphql
- Refreshes
- At most every 10 minutes
- API docs
- Fly.io reference, checked 2026-09-18
Prepaid credit, not the running bill: usage on a paid plan is invoiced monthly and Fly publishes no figure for the open period.