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

# Bring Your Own Key

> Use your own API keys with OCCode for full control over models and costs.

## What is BYOK?

**Bring Your Own Key** means you can use your own AI provider API keys with OCCode instead of (or alongside) the built-in credits system. This gives you:

* **Model choice** — use Claude, GPT, Gemini, Llama, or any supported model
* **Cost control** — pay your provider directly at their rates
* **No credit limits** — your usage is limited only by your provider's quota

***

## Supported providers

| Provider       | Models                               | How to get a key                                       |
| -------------- | ------------------------------------ | ------------------------------------------------------ |
| **Anthropic**  | Claude 4, Claude Opus, Claude Sonnet | [console.anthropic.com](https://console.anthropic.com) |
| **OpenAI**     | GPT-5, GPT-4o, o3                    | [platform.openai.com](https://platform.openai.com)     |
| **Google**     | Gemini 3, Gemini 2.5                 | [aistudio.google.com](https://aistudio.google.com)     |
| **OpenRouter** | 200+ models                          | [openrouter.ai](https://openrouter.ai)                 |

<Tip>**OpenRouter** is a great option if you want access to many models with a single key.</Tip>

***

## Adding your API key

<Steps>
  <Step title="Open the Models app" icon="cube">
    In OCCode, navigate to the **Models** app from the sidebar.
  </Step>

  <Step title="Click Add Provider" icon="plus">
    Select your provider from the list.
  </Step>

  <Step title="Paste your API key" icon="paste">
    Enter your API key. OCCode validates it immediately.
  </Step>

  <Step title="Set as default (optional)" icon="star">
    Choose whether to use this provider as your default model.
  </Step>
</Steps>

***

## How billing works with BYOK

| Setup                           | Who pays                               |
| ------------------------------- | -------------------------------------- |
| No custom keys                  | You pay via OCCode credits             |
| Custom keys added               | Your provider bills you directly       |
| Mixed (some BYOK, some default) | Each model bills its respective source |

<Info>When you use your own keys, **no OCCode credits are consumed** for those models. Your credit balance is only used for the built-in Legacy Model.</Info>

***

## Which key is used where?

See [Which Key is Used Where](/key-routing) for a detailed breakdown of how OCCode decides which API key to use for each interaction.