Contract Risk Analyzer

Contract Risk Analyzer is a FastMCP server + LangGraph workflow that ingests financial contract PDFs, extracts key clauses and obligations, flags known risk terms with severity, compares contract versions, and synthesizes everything into a structured risk brief for lawyers, risk teams, and operators who need fast, explainable contract triage.

The MCP tools accept either a local file_path or a remote pdf_url. For hosted deployments such as Railway, use pdf_url so the server can download the PDF into temporary storage before analysis.

Architecture (high level)

PDF
  |
  v
FastMCP_Server
  |
  +--> extract_clauses
  +--> flag_risk_terms
  +--> summarize_obligations
  +--> compare_contracts
  |
  v
LangGraph_Agent (orchestrates tools)
  |
  v
RiskBrief (Pydantic structured output)

Setup (local)

cd contract-risk-analyzer
cp .env.example .env
source .venv/bin/activate  # if you already created the project virtualenv
pip install -e ".[dev]"
python -m contract_risk_analyzer.server

• MCP endpoint: http://localhost:8000/mcp
• Health check: http://localhost:8000/health
• The .env file must contain OPENAI_API_KEY.

Connecting from Claude Desktop (MCP client)

Option A: Run as a local STDIO server (Claude Desktop spawns it)

In Claude Desktop, add an MCP server entry similar to:

{
  "mcpServers": {
    "contract-risk-analyzer": {
      "command": "python",
      "args": ["-m", "contract_risk_analyzer.server"],
      "env": {
        "OPENAI_API_KEY": "YOUR_KEY_HERE"
      }
    }
  }
}

Option B: Connect to the local HTTP server

If you run the server yourself (python -m contract_risk_analyzer.server), bridge Claude Desktop to the local MCP HTTP endpoint with mcp-remote:

{
  "mcpServers": {
    "contract-risk-analyzer": {
      "command": "npx",
      "args": [
        "mcp-remote",
        "http://127.0.0.1:8000/mcp",
        "--allow-http"
      ]
    }
  }
}

Option C: Connect to the deployed Railway server

The deployed server is available at:

• Health check: https://contract-risk-analyzer-production-410a.up.railway.app/health
• MCP endpoint: https://contract-risk-analyzer-production-410a.up.railway.app/mcp

Claude Desktop config:

{
  "mcpServers": {
    "contract-risk-analyzer": {
      "command": "npx",
      "args": [
        "mcp-remote",
        "https://contract-risk-analyzer-production-410a.up.railway.app/mcp"
      ]
    }
  }
}

Example tool calls

Input source rules

For single-contract tools, provide exactly one of:

{
  "file_path": "/app/samples/contract.pdf"
}

or:

{
  "pdf_url": "https://example.com/contracts/contract.pdf"
}

For compare_contracts, provide exactly one source for each side:

{
  "pdf_url_a": "https://example.com/contracts/v1.pdf",
  "pdf_url_b": "https://example.com/contracts/v2.pdf"
}

Remote PDFs are downloaded to temporary storage, capped at 50 MB per PDF, and deleted after each tool call.

extract_clauses

Input:

{
  "pdf_url": "https://example.com/contracts/isda.pdf",
  "clause_type": "termination events"
}

Sample output:

[
  {
    "section_name": "ARTICLE_VII TERMINATION",
    "clause_type": "termination events",
    "raw_text": "…",
    "plain_english": "…",
    "page_references": [12, 13]
  }
]

flag_risk_terms

Input:

{ "pdf_url": "https://example.com/contracts/isda.pdf" }

Sample output:

[
  {
    "term": "cross-default",
    "context": "…",
    "risk_explanation": "…",
    "severity": "high",
    "page_reference": 9
  }
]

summarize_obligations

Input:

{ "pdf_url": "https://example.com/contracts/isda.pdf" }

Sample output:

[
  {
    "party": "Borrower",
    "obligations": ["Deliver monthly financial statements…"],
    "key_deadlines": ["Within 30 days after month-end…"],
    "conditions": ["So long as no Event of Default has occurred…"]
  }
]

compare_contracts

Input:

{
  "pdf_url_a": "https://example.com/contracts/v1.pdf",
  "pdf_url_b": "https://example.com/contracts/v2.pdf"
}

Sample output:

{
  "added_clauses": ["New collateral top-up requirement…"],
  "removed_clauses": ["Removed cure period for payment default…"],
  "materially_changed_clauses": [
    {
      "section_name": "ARTICLE_IV EVENTS_OF_DEFAULT",
      "change_summary": "Acceleration now triggers immediately…",
      "risk_note": "Increases lender leverage; reduces borrower flexibility."
    }
  ],
  "risk_delta": "Overall risk increased for Borrower due to tighter default/acceleration terms."
}

Deployment (Railway)

• Build: Railway will build the container from Dockerfile.
• Run: The container runs python -m contract_risk_analyzer.server and binds to $PORT (default 8000).
• Health check: GET /health returns {"status":"ok"}.
• Environment: Set OPENAI_API_KEY in Railway service variables.
• Current deployment: https://contract-risk-analyzer-production-410a.up.railway.app.

Tech stack

• FastMCP
• OpenAI GPT-4o (via openai SDK)
• PyMuPDF (pymupdf)
• Pydantic
• LangGraph
• Docker
• Railway