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

# Codex

> CLI and IDE extension share the same configuration

Codex supports MCP servers in both the CLI and the IDE extension. Configuration is shared between them, so you only set it up once.

## Option A, CLI

Run from your terminal:

```bash theme={null}
codex mcp add openfinance-tech --url https://api.openfinance.tech/agent/mcp
```

Verify it is configured:

```bash theme={null}
codex mcp list
```

## Option B, edit `config.toml`

Open `~/.codex/config.toml` (or a project-scoped `.codex/config.toml` in trusted projects) and add:

<Tabs>
  <Tab title="Public-only">
    ```toml theme={null}
    [mcp_servers.openfinance-tech]
    url = "https://api.openfinance.tech/agent/mcp"
    ```
  </Tab>

  <Tab title="With wallet tools">
    ```toml theme={null}
    [mcp_servers.openfinance-tech]
    url = "https://api.openfinance.tech/agent/mcp"
    http_headers = { "x-api-key" = "open_xxxxx" }
    ```
  </Tab>
</Tabs>

<Warning>
  Codex uses TOML, not JSON. The header block is a TOML inline table, note the `=` instead of `:`.
</Warning>

## First-time MCP users

If this is your first MCP server in Codex, you may need to enable the rmcp client. Add the following to `~/.codex/config.toml`:

```toml theme={null}
[features]
experimental_use_rmcp_client = true
```

## Verify

After starting Codex (CLI or IDE), run `/mcp` in the TUI or open the IDE MCP panel. `openfinance-tech` should appear with its tools listed.