---
title: "Osaurus Setup Guide for RewriteBar"
description: "Run models locally with Osaurus on your Mac and connect its OpenAI-compatible server to RewriteBar for private AI writing."
url: "https://rewritebar.com/docs/ai-providers/osaurus"
---

# Osaurus

Use Osaurus as a local AI provider in RewriteBar to run models on your Mac.

![Osaurus Server Settings](https://cdn.rewritebar.com/docs/osaurus-rewritebar.jpeg)

## Quick Setup

1. Install Osaurus from [osaurus.ai](https://osaurus.ai/).
2. Follow the setup instructions in the onboarding flow and create a user profile.
3. Open Osaurus Settings -> Server and create a access token for RewriteBar.
4. Open RewriteBar and go to **Preferences** → **AI Provider**
5. Create a OpenAI-compatible provider
6. Enter the base URL and access token shown in Osaurus.
7. Click **Verify and Enable**.

## Notes

- Osaurus is local-first. Response speed depends on your Mac specs and selected model.
- Start with a smaller model for speed, then move to a larger model if you need higher quality.

## Troubleshooting

- **Connection refused**: confirm Osaurus is running and the local endpoint URL is correct.
- **Model not found**: choose a model that is installed and available in Osaurus.
- **Slow responses**: switch to a smaller model or close memory-heavy apps.

## References

- [Osaurus Documentation](https://docs.osaurus.ai/)
- [Osaurus API Reference](https://docs.osaurus.ai/api)