Cloudflare Account ID

Quick reference

• Env var: CF_ACCOUNT_ID
• Required for: every deploy (all workers, DNS, custom domain setup)
• Permissions / scopes: not applicable — this is a public identifier, not a secret. It's only sensitive because it scopes which account your API token writes to.
• Validation: mastrakit doctor --key CF_ACCOUNT_ID (checks the ID exists and that your CLOUDFLARE_API_TOKEN can access it)

Where to find it

1. Go to dash.cloudflare.com and sign in.
2. In the sidebar, click Workers & Pages (or any zone).
3. The Account ID is shown on the right-hand side of the overview page — a 32-character hex string.
4. Click the copy icon next to it.

Alternative: the Account ID is also visible in the URL when you're in a worker. dash.cloudflare.com/<account-id>/workers/...

Add to your project

Paste into .env.dev-secrets (gitignored):

CF_ACCOUNT_ID=bc23091c80334ec6751586189e46be26

Note: the env var is CF_ACCOUNT_ID, not CLOUDFLARE_ACCOUNT_ID. Older docs and the previous deploy.json schema used the longer form; the codebase uses CF_ACCOUNT_ID everywhere.

Multiple accounts

If your Cloudflare login has access to multiple accounts (e.g. personal + work), double-check you copied the ID for the account you want to deploy to. The validator can't catch a "wrong account" — it can only confirm "this account exists and this token can access it".