> ## Documentation Index
> Fetch the complete documentation index at: https://fal.ai/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# FAQ

Common questions about using fal. If you can't find the answer here, join our [Discord community](https://discord.gg/fal-ai) or [contact support](mailto:support@fal.ai).

<AccordionGroup>
  <Accordion title="Is there a rate limit?">
    Yes. Every account has a [concurrency limit](/documentation/model-apis/concurrency-limits) that controls how many requests can be processed at the same time. New accounts start at 2 concurrent requests. As you purchase credits, the limit increases automatically up to 40. Requests that exceed your limit are queued and processed as slots free up. For higher limits, [contact sales](https://fal.ai/enterprise#contact-sales).
  </Accordion>

  <Accordion title="Do you charge for failed requests?">
    Server errors (HTTP 500+) are never charged. If a runner fails to process your request due to an infrastructure issue, you pay nothing. Client-side errors like invalid inputs (HTTP 422) may still be charged if a runner spent GPU time processing the request before the error was detected.
  </Accordion>

  <Accordion title="Do my credits expire?">
    Purchased credits expire 365 days from the date of purchase. Free credits and coupons have variable expiration depending on the specific grant, ranging from 1 week to 1 year. Check the [billing dashboard](https://fal.ai/dashboard/billing) for your current credit balance and expiration dates.
  </Accordion>

  <Accordion title="Do I pay for cold starts?">
    No. For Model API endpoints, you are billed only for inference time. Cold start time, including container pull and model loading, is not charged.
  </Accordion>

  <Accordion title="What happens when my credits run out?">
    When your credit balance drops below your account's lock threshold, your account is locked and API requests will be rejected. Add credits from the [billing dashboard](https://fal.ai/dashboard/billing) to unlock your account. Enterprise customers on invoice-based billing are not subject to automatic locking.
  </Accordion>

  <Accordion title="How long are generated files stored?">
    Generated media files (images, videos, audio) are stored on the [fal CDN](/documentation/model-apis/fal-cdn) and available for at least 7 days by default. You can control the retention period per request using the `X-Fal-Object-Lifecycle-Preference` header. See [Data Retention](/documentation/model-apis/media-expiration) for details. Download and store any files you need to keep long-term.
  </Accordion>

  <Accordion title="Are generated file URLs public?">
    Yes. Media URLs returned by fal (`https://v3.fal.media/...`) are publicly accessible. Anyone with the URL can access the file until it expires. If you need private storage, download the files to your own infrastructure.
  </Accordion>

  <Accordion title="Can I use generated files for commercial purposes?">
    Each model has its own license. Most models on fal are available for commercial use and are marked with a `Commercial use` badge on the model page. Models marked `Research only` are restricted to non-commercial use. Check the model's page for its specific license.
  </Accordion>

  <Accordion title="Can I call fal from the browser?">
    Yes, but you should not expose your API key in client-side code. Set up a [server-side proxy](/documentation/model-apis/inference/proxy-setup) that forwards requests to fal from your backend, keeping your key secure.
  </Accordion>

  <Accordion title="Can I deploy my own models?">
    Yes. [fal Serverless](/documentation/serverless) lets you deploy your own models and applications on fal's GPU infrastructure. You can use any Python framework, bring your own Docker image, and scale automatically. See the [quickstart](/documentation/development/getting-started/quick-start) to get started.
  </Accordion>

  <Accordion title="Why was my request rejected with a content policy violation?">
    fal applies content filters on certain models. If your request triggers a `content_policy_violation` error, the input was flagged by automated safety systems. This is a non-retryable 422 error. See the [error reference](/documentation/model-apis/errors) for details on this and other error types.
  </Accordion>

  <Accordion title="What is the Partner API?">
    Models marked `Partner API` are hosted by fal's partners. Percentage discounts do not apply to partner API models, and their availability is managed by the partner.
  </Accordion>

  <Accordion title="Can I switch to invoice-based billing?">
    Yes. Invoice-based billing is available for higher-volume customers. [Contact sales](https://fal.ai/enterprise#contact-sales) with details about your expected usage.
  </Accordion>

  <Accordion title="Do you offer volume discounts?">
    Yes. [Contact sales](https://fal.ai/enterprise#contact-sales) with information about your expected volume to discuss custom pricing.
  </Accordion>

  <Accordion title="When logging in with GitHub, I never receive the one-time code">
    The one-time code is sent to the primary email on your GitHub account. If you no longer monitor that email, check [GitHub's documentation](https://docs.github.com/en/account-and-profile/setting-up-and-managing-your-personal-account-on-github/managing-email-preferences/changing-your-primary-email-address) to find or update it.
  </Accordion>
</AccordionGroup>