# Codex

Connect Codex to Bizora from the Codex settings UI.

## Setup

1. Open Codex and go to **Settings** > **MCP servers**.
2. Choose **Add server**.
3. Enter `Bizora Tax` as the name.
4. Select **Streamable HTTP**.
5. Use this URL:

```txt
https://mcp.api-bizora.ai/mcp
```

![Codex custom MCP server form using the production Bizora MCP URL](/img/mcp/codex-add-mcp.webp)

6. Leave bearer token, headers, and environment-variable fields empty.
7. Save the server.
8. Select **Authenticate** for the Bizora server.
9. Complete the browser sign-in and continue back to Codex.
10. Ask Codex to use Bizora for a tax research question.

## What Codex Receives

- Tool access through Bizora MCP at https://mcp.api-bizora.ai/mcp.
- OAuth discovery through https://mcp.api-bizora.ai/.well-known/oauth-protected-resource.
- Compact source identifiers for citations in the default `minimal` response: `sources.s3_file_path` and `sources.node_id`.
- The default `tax-research` tool, backed by `tax_research_fast_research`.

For tool selectors, response formats, ZDR, and long-running request behavior, use the [MCP Server](../overview.mdx) page as the source of truth.