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

# Where do I put my API key for each protocol?

| Protocol | Authentication header |
| - | - |
| OpenAI Chat | `Authorization: Bearer API_KEY` |
| Gemini | `x-goog-api-key: API_KEY` |
| Anthropic | `x-api-key: API_KEY` |

Anthropic also requires `anthropic-version`. All examples use a ViVi-API key. Replace `API_KEY` with the key from your token.

Complete examples: [OpenAI Chat](https://docs.viviai.cc/en/openai-chat.md) · [Gemini](https://docs.viviai.cc/en/gemini.md) · [Anthropic](https://docs.viviai.cc/en/anthropic.md)


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