@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

Tools

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

Data (live oracle)

| Tool | Description | |------|-------------| | data_get_basket | All models with provider, tier, USD prices per million tokens, cache multipliers | | data_get_price | Price for a single model (e.g. claude-opus-4.7) | | data_get_scu | Current Standard Compute Unit — the market benchmark price | | data_get_cpi | Full Compute Price Index — basket with SCU breakdown, version, raw/marked-up prices | | data_get_tiers | Tier weights (frontier, standard, lightweight) and per-tier averages | | data_get_reconstitutions | Historical basket changes — model swaps, SCU before/after |

Compute

| Tool | Description | |------|-------------| | compute_estimate | Nominal USD cost for a model given input/output token counts | | compute_compare | Rank all basket models by cost for a workload, grouped by tier |

Render (Claude Code skills)

| Tool | Description | |------|-------------| | render_session_report | Pre-formatted session cost report — used by /cf-session-management | | render_consumption_report | Pre-formatted per-inference breakdown — used by /cf-session-consumption | | render_active_sessions | Overview of recent sessions across projects — used by /cf-active-sessions |

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

| Tool | Description | |------|-------------| | analyze_session | Raw JSON session analysis (for custom UI, not skills) | | analyze_inferences | Raw JSON per-inference breakdown (for custom UI, not skills) |

History

| Tool | Description | |------|-------------| | telemetry_get_history | Aggregate stats across logged sessions — cumulative cost, per-profile medians, insights |

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