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

# Use Nika with Open WebUI

> The mcpo recipe: proxy the read-only Nika oracle as an OpenAPI tool server and register it in Open WebUI. Wiring is manual (no wire target).

[Open WebUI](https://github.com/open-webui/open-webui) consumes OpenAPI
tool servers, and its companion proxy
[mcpo](https://github.com/open-webui/mcpo) turns any stdio MCP server into
one. That is the recipe for Nika: run the oracle behind mcpo, register the
endpoint.

Wiring is manual — `nika wire` has no Open WebUI target.

## The recipe

The binary comes first: `brew install supernovae-st/tap/nika`
([other paths](/getting-started/installation)). Then:

```sh theme={"system"}
uvx mcpo --port 8000 -- nika mcp
```

mcpo serves the oracle's eight `nika_*` tools as OpenAPI endpoints (the
interactive docs appear at `http://localhost:8000/docs`). Register
`http://localhost:8000` as a tool server in Open WebUI — its
[mcpo guide](https://github.com/open-webui/mcpo#readme) shows where — and
the tools appear in chat.

## What you get

Validation, explanation, schema and cost answers with receipts — no
execution, no mutation, by design
([the oracle's contract](/reference/mcp-server)). Running workflows stays
on the terminal, where the budget flags and traces live.

## Verify

Ask a chat with the tool server enabled to check a workflow — the
`nika_check` call shows up in the response's tool trail. Then prove the
loop end-to-end: [integrate in 10 minutes](/integrations/quickstart).