railway scale supports region assignments

Introduced 2026-05-07 · score 0.92

HOW TO USE IT

When setting a service’s replica counts by region, run `railway scale` with at least one `REGION=REPLICAS` assignment. For example, `railway scale eu-west=2 us-east=1` sets two replicas in EU West and one in US East.

WHY THIS HELPS

When changing a service’s region scaling in Railway, set its region counts from the CLI.

REQUIREMENTS AND LIMITATIONS

• Version: v4.53.0
• REGION=REPLICAS (required): One or more positional assignments: a friendly region name or Railway region ID, followed by a non-negative integer replica count. Maximum 50 total replicas across regions.
• -s, --service <SERVICE>: Service to scale; defaults to the linked service.
• -e, --environment <ENV>: Environment for the service; defaults to the linked environment.
• --json: Output the result in JSON format.

FIRST-PARTY EVIDENCE

• https://github.com/railwayapp/cli/releases/tag/v4.53.0
• https://github.com/railwayapp/cli/pull/881
• https://docs.railway.com/cli/scale

Check the installed version and the source before using it. Entry JSON

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