Billing and Limitations

Last updated Apr 23, 2026

Billing

Requests to a project with static assets can either return static assets or invoke the Worker script, depending on if the request matches a static asset or not.

  • Requests to static assets are free and unlimited. Requests to the Worker script (for example, in the case of SSR content) are billed according to Workers pricing. Refer to pricing for an example.
  • There is no additional cost for storing Assets.
  • Important note for free tier users: When using run_worker_first, requests matching the specified patterns will always invoke your Worker script. If you exceed your free tier request limits, these requests will receive a 429 (Too Many Requests) response instead of falling back to static asset serving. Negative patterns (patterns beginning with !/) will continue to serve assets correctly, as requests are directed to assets, without invoking your Worker script.

Limitations

See the Platform Limits

Troubleshooting

  • assets.bucket is a required field — if you see this error, you need to update Wrangler to at least 3.78.10 or later. bucket is not a required field.

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description: Details on how to configure Workers static assets and its binding. title: Configuration and Bindings image: https://developers.cloudflare.com/workers/static-assets/binding/og.png?v=cb99c9bbfafafcaf

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