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

# Logo API Usage Guidelines

> Instantly add any company logos to your app or website

<Tip>
  Logo API is free to use and <u>we don't ask for any attribution</u>.
</Tip>

## Authentication

**To use Logo API, you must include your client ID with every request.**

Adding your client ID provides reliable access, supports fair usage, and keeps consistent performance across all requests.

[Create a free account](https://developers.brandfetch.com/register) and access your client ID from the developer portal.

Include your client ID in each request as shown in the example below:

```html theme={null}
<img
  src="https://cdn.brandfetch.io/:domain?c=BRANDFETCH_CLIENT_ID"
  alt="Logos by Brandfetch"
/>
```

## Hotlinking

**We require logo links to be directly embedded in your applications.**

Embedding logo links directly within your HTML image tags guarantees that the logo remains up-to-date at all times. It also ensures a faster and more reliable implementation.

<Info>
  When embedding a logo link, HTTP requests must include the `Referer` header
  with the request origin. Your HTTP `Referrer-Policy` header must be set to one
  of: `origin`, `origin-when-cross-origin`, `strict-origin`,
  `strict-origin-when-cross-origin` (browser default), or `unsafe-url`.
</Info>

<Warning>
  <b>Programmatic access</b> to logo images is not permitted and may result in
  rate limiting or blocking. Scraping logos will also lead to a block.
</Warning>

If your use case requires caching, please [contact us](https://brandfetch.com/developers/contact/sales) for a custom setup.

## Replicating Brandfetch

**You cannot replicate the core user experience of Brandfetch.**

The best way to ensure that your application doesn’t violate this guideline is by integrating Brandfetch into an existing app that offers more value than just the Brandfetch integration.

Some examples:

* ✅ The [Typeform integration](https://brandfetch.com/developers/customers/typeform) improves the user’s onboarding by presenting brand logos. Without this integration, the app still has a lot of value to its users.
* ✅ The [Pitch integration](https://brandfetch.com/developers/customers/pitch) brings brand logos inside Pitch’s editor to streamline the creation of presentations. Without this integration, the app still has a lot of value to its users.
* 🚫 A logo search that only returns logos from Logo API. Without the integration, the app has no content and no value to users.
* 🚫 An unofficial Logo API that allows users to access brand logos via Logo API. Without the API, the app has no content and no value to users.

If you're unsure about your use case, please [contact us](https://brandfetch.com/developers/contact).