@compute-finance/mcp

Live AI compute pricing oracle — real-time LLM model prices across providers (Anthropic, OpenAI, Google, xAI) via the Compute Finance Oracle.

A stdio MCP server. Works in any MCP client. Includes optional Claude Code skills for session cost analysis.

Quick start

Claude Code (recommended)

npx @compute-finance/mcp setup

This single command:

1. Registers the MCP server at user scope (claude mcp add)

2. Installs Claude Code skills (/cf-session-management, /cf-session-consumption, /cf-active-sessions)

3. Installs the cost hook — a UserPromptSubmit hook that injects session cost into Claude's context so every response can show how much you've spent

Restart Claude Code after setup.

Or register manually without skills/hook:

claude mcp add --scope user compute-finance -- npx @compute-finance/mcp

Cursor / VS Code / Any MCP client

Add to your MCP config (.cursor/mcp.json, VS Code settings, etc.):

{
  "mcpServers": {
    "compute-finance": {
      "command": "npx",
      "args": ["@compute-finance/mcp"]
    }
  }
}

From source

git clone https://github.com/compute-finance/mcp.git
cd mcp
npm install && npm run build
npx . setup

Related MCP server: volthq-mcp-server

Tools

17 tools across five layers — no API key required. All tools are read-only.

Data (live oracle)

Cache pricing comes from the Compute Finance Oracle. Session and consumption reports show effective (cache-aware) cost when the oracle has published the relevant cache components; otherwise they show nominal cost (input rate applied to every input variant) and label effective as unavailable for that model.

Compute

Render (Claude Code skills)

Reports surface three orthogonal counts: prompts (what you typed), inferences (assistant replies — tool-loop sessions produce several per prompt), and tool calls (tool_use blocks). The triplet is identical across all three reports for the same session.

Analysis

History

Cost hook

The setup command installs a UserPromptSubmit hook into ~/.claude/settings.json. Every time you send a message, the hook reads the current session transcript, prices it against the live oracle, and injects a cost summary into Claude's context via additionalContext. Claude then appends a 💰 Compute.Finance · … line at the end of its response.

Guards — the hook fires only when all three conditions are met:

• Session cost exceeds $1

• Session has at least 5 user prompts

• At least 10 minutes since the last fire (per session)

On any failure (oracle down, transcript missing, parse error) the hook exits silently — it never blocks your prompt.

Manual installation

If setup can't write to settings.json, add the hook manually:

{
  "hooks": {
    "UserPromptSubmit": [
      {
        "matcher": "",
        "hooks": [
          {
            "type": "command",
            "command": "npx @compute-finance/mcp hook-prompt"
          }
        ]
      }
    ]
  }
}

Uninstall

Remove the UserPromptSubmit entry from ~/.claude/settings.json.

Privacy

All data stays on your machine. The only network calls are unauthenticated GETs to api.compute.finance/v1/oracle/*. Session logs (~/.compute-finance/sessions.jsonl, ~/.compute-finance/inferences.jsonl) are never uploaded.

Links

• Compute Finance

• Oracle API

• OpenAPI spec

• npm package