> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://www.comet.com/docs/opik/cost-intelligence/mcp-server/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://www.comet.com/_mcp/server.

# Query spend with MCP

Point the Opik MCP server at your Cost Intelligence workspace and you can ask your coding agent about your organization's spend in plain language: who spends the most, which skills and MCP servers earn their keep, and what drove the cost of a single session. The agent reads the same figures as the Cost Intelligence dashboard, and links each answer to the matching page so you can check it.

> **Note**
>
> Only admins can use it. The Cost Intelligence workspace holds company-wide
> data, so access to it is limited to admins, and the MCP server can only read
> what your own API key can.

## Before you begin

You need three things:

* [`uv`](https://docs.astral.sh/uv/), which runs the MCP server.
* Your Opik API key, from your [Opik account settings](https://www.comet.com/settings/api-keys?utm_source=opik\&utm_medium=docs\&utm_campaign=cost_intelligence).
* The name of your Cost Intelligence workspace. It is `__ai_spend_` followed by your organization ID and two underscores, for example `__ai_spend_XJtf7HIqB9i2K59BxoHmUUGTD__`. To find yours, open **Cost Intelligence** from the user menu in Opik and copy the name from the browser address bar, which reads `https://www.comet.com/opik/<workspace>/ai-spend/...`.

## Set it up

#### Install uv, if you don't have it

**`macOS / Linux`**

```bash title="macOS / Linux"
curl -LsSf https://astral.sh/uv/install.sh | sh
```

**`Windows`**

```powershell title="Windows"
powershell -ExecutionPolicy ByPass -c "irm https://astral.sh/uv/install.ps1 | iex"
```

Open a new terminal afterwards so `uvx` is on your `PATH`.

#### Add the server to your coding agent

Add it under its own name, `opik-cost-intelligence`, so it sits alongside any Opik MCP server you already use for your regular workspace.

#### Claude Code

```bash
claude mcp add --scope user opik-cost-intelligence \
  --env OPIK_API_KEY=<your-api-key> \
  --env OPIK_WORKSPACE=<your-cost-intelligence-workspace> \
  -- uvx opik-mcp
```

#### Cursor

Edit `~/.cursor/mcp.json`:

```json
{
  "mcpServers": {
    "opik-cost-intelligence": {
      "type": "stdio",
      "command": "uvx",
      "args": ["opik-mcp"],
      "env": {
        "OPIK_API_KEY": "<your-api-key>",
        "OPIK_WORKSPACE": "<your-cost-intelligence-workspace>"
      }
    }
  }
}
```

#### Codex

```bash
codex mcp add opik-cost-intelligence \
  --env OPIK_API_KEY=<your-api-key> \
  --env OPIK_WORKSPACE=<your-cost-intelligence-workspace> \
  -- uvx opik-mcp
```

For other clients, [Advanced setup](/mcp-server/advanced-setup#local-server) shows where each one keeps this configuration.

> **Tip**
>
> On a self-hosted Comet deployment, also set `COMET_URL_OVERRIDE` to your
> instance URL. The server expects Opik's API at that URL plus `/opik/api`.
> If your deployment serves it at a different host or path, also set
> `OPIK_URL` to the full API URL.

#### Start a new session and check it works

Coding agents read their MCP configuration at startup, so start a new session, then ask:

**`Check it worked`**

```text title="Check it worked"
Summarize our coding agent spend over the last 30 days.
```

The agent should answer with total spend and how it compares with the 30 days before.

## Questions to ask

Answers cover the last 30 days unless you name another time window.

**`Spend overview`**

```text title="Spend overview" wordWrap
Tell me about our company's AI spend, and break it down for the top 10 token consumers.
```

Total spend for the period, and what each of the ten heaviest users spends their tokens on.

**`Most used skills`**

```text title="Most used skills" wordWrap
Which skills do people across the company use the most?
```

Which skills earn their place, and which ones only add to every request.

**`Unused MCP servers`**

```text title="Unused MCP servers" wordWrap
Are we paying for any MCP servers that nobody actually uses?
```

MCP servers that are installed but never called, and what removing them would save.

**`Duplicate MCP servers`**

```text title="Duplicate MCP servers" wordWrap
Is anyone running the same MCP server in more than one way, for example as a claude.ai connector and as a local install?
```

Duplicates like `claude_ai_Notion` and `Notion`, where users pay for the same tool definitions twice.

**`Session deep dive`**

```text title="Session deep dive" wordWrap
Walk me through my most recent session. What drove most of its cost?
```

What one session did, step by step, and which cost category dominated it.

## Troubleshooting

* **The agent says it has no access to spend data.** The server is pointed at the wrong workspace. Set `OPIK_WORKSPACE` to your Cost Intelligence workspace, the one starting with `__ai_spend_`. An `opik-mcp` version older than 0.2.38 shows the same symptom; if `uvx` is still running an older copy from its cache, run `uv cache clean opik-mcp`. Restart the coding agent after any change.
* **The agent reports an authentication or permission error.** The API key belongs to an account without access to the Cost Intelligence workspace. Use an admin's key.

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