TIF Score MCP

An MCP (Model Context Protocol) server that exposes three tools to any MCP-compatible client (Claude Desktop, Claude Code, or anything else that speaks MCP):

• score_conversation — analyzes a call transcript and returns structured business intelligence.

• get_lead_score — scores a transcript 0-100 and classifies it hot / warm / cold.

• diagnose_workflow_error — given an n8n workflow's JSON and an error message, returns a root cause and a proposed minimal fix.

This is a port, not a rewrite: the scoring prompt and weighting logic are adapted from a real, working conversation-analysis and lead-scoring pipeline (company and product names generalized for this public repo), and the workflow-diagnosis tool is a scoped-down port of a larger workflow self-healing system's diagnostic reasoning. See docs/BTS.md for a plain-language writeup of the whole process, from planning through finished server.

Demo

Real MCP server, real Claude API calls, real output — no mocked data. Generated by running demo/run-demo.mjs (npm run demo):

Related MCP server: n8n-mcp

Tools

score_conversation

Input:

{
  "transcript": "Agent: Thanks for calling...\nCaller: Hi, I need to book...",
  "call_duration": 184,
  "raw_outcome": "completed",
  "source_system": "Retell"
}

Output:

{
  "intent": "booking",
  "sentiment": "positive",
  "urgency": "high",
  "objections": ["price"],
  "outcome": "booked",
  "topics": ["appointment booking", "pricing question"],
  "missed_opportunity": false,
  "follow_up_needed": false,
  "revenue_signal": "high",
  "churn_risk": false,
  "ai_summary": "The caller wanted a same-day appointment and asked about price before booking. They booked a 4pm slot despite the price being a bit higher than expected."
}

get_lead_score

Same input shape as score_conversation, plus an optional repeat_caller boolean (see Known limitation below).

Output:

{
  "score": 75,
  "tier": "hot",
  "signals_used": ["high urgency (+25)", "booking intent (+20)", "booked outcome (+20)", "positive sentiment (+10)"]
}

Scoring weights:

Score is clamped to 0-100. Bands: 70-100 hot, 40-69 warm, 0-39 cold.

diagnose_workflow_error

Input:

{
  "workflowJson": { "name": "...", "nodes": [...], "connections": {...} },
  "errorMessage": "Cannot read properties of undefined (reading 'toUpperCase')"
}

Output:

{
  "rootCause": "The Code node assumes $json.body.customer always exists, but the webhook can receive a payload without a customer object.",
  "fixSummary": "Add optional chaining so the node doesn't throw when customer is missing.",
  "fixable": true,
  "fixedWorkflow": { "...": "complete corrected workflow JSON" },
  "confidence": "medium",
  "notes": "Verify the caller of this node can tolerate a null email before deploying."
}

Scope note: this tool is a deliberately scoped-down port of a larger, stateful self-healing system. The original dispatches a separate evaluator sub-agent so the fix-generator never grades its own work, retries once on a rejected fix, fetches and writes back to a live n8n instance, and persists memory between runs. None of that fits inside one stateless MCP tool call, so only the diagnostic reasoning was ported: classify the error, propose the smallest possible fix, and admit honestly when a workflow edit can't fix it (expired credentials, rate limits, upstream outages, etc). Treat fixedWorkflow as a starting point for human or separate review, not something to auto-deploy.

Known limitation: repeat_caller

The "repeat caller" signal (+15 points) can't be derived from a transcript's text alone — it requires knowing call history, which this stateless tool doesn't have access to. If you already know this from your own CRM or call log, pass repeat_caller: true explicitly; otherwise it defaults to false and that signal is simply not counted.

Setup

npm install
cp .env.example .env
# edit .env and set ANTHROPIC_API_KEY

Registering with an MCP client

Add this to your .mcp.json (or the equivalent config for your client), using an absolute path since .mcp.json doesn't reliably resolve relative paths across clients:

{
  "mcpServers": {
    "tif-score-mcp": {
      "command": "node",
      "args": ["/absolute/path/to/tif-score-mcp/src/index.js"],
      "env": {
        "ANTHROPIC_API_KEY": "your-key-here"
      }
    }
  }
}

Restart your MCP client afterward so it picks up the new server.

Testing

npm run test:unit    # pure scoring-math tests, no network, no API key needed
npm run test:client  # spawns the real server, calls all three tools over real stdio JSON-RPC — needs ANTHROPIC_API_KEY, makes real (billed) API calls

You can also poke all three tools interactively without writing any code:

npx @modelcontextprotocol/inspector node src/index.js

A model compatibility note

This server defaults to claude-sonnet-4-6 with temperature: 0 for deterministic output. That's a deliberate choice: claude-sonnet-4-6 is the newest model that still accepts the temperature parameter — newer models (Opus 4.7+, Fable 5) reject it outright. If you change TIF_MODEL to a newer model, remove temperature from the calls in src/lib/anthropic.js first, or every tool call will fail.

Security

Never commit real API keys. .env is gitignored from the first commit, and .mcp.json in this repo only ever contains a placeholder — fill in your real key locally, not in version control.

Project layout

See CLAUDE.md for a fuller orientation, LEARNINGS.md for decisions made while building this, and SKILLS.md for which tools/skills this project leaned on.

License

MIT — see LICENSE.