> For the complete documentation index, see [llms.txt](https://docs.riku.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.riku.ai/fundamentals-of-riku.md).

# Fundamentals of Riku

- [Connecting Keys](https://docs.riku.ai/fundamentals-of-riku/connecting-keys.md): All Riku accounts come with GPT-J connected using our infrastructure, for the other providers, you will need to add your own keys.
- [Connecting Aleph Alpha Keys](https://docs.riku.ai/fundamentals-of-riku/connecting-keys/connecting-aleph-alpha-keys.md)
- [Connecting Muse API Keys](https://docs.riku.ai/fundamentals-of-riku/connecting-keys/connecting-muse-api-keys.md)
- [Connecting OpenAI Keys](https://docs.riku.ai/fundamentals-of-riku/connecting-keys/connecting-openai-keys.md): OpenAI was invite only for so long but that has all changed making connecting your OpenAI key to Riku super simple!
- [Connecting Cohere Keys](https://docs.riku.ai/fundamentals-of-riku/connecting-keys/connecting-cohere-keys.md)
- [Connecting AI21 Keys](https://docs.riku.ai/fundamentals-of-riku/connecting-keys/connecting-ai21-keys.md)