Finwatch

A custom MCP Server for financial portfolio monitoring, risk analysis, and compliance — powered by LangGraph + Claude.

Turn natural language into actionable financial intelligence. Ask your portfolio questions like "What's my risk exposure to tech stocks?" or "Flag any anomalous movements in the last 24h" and get data-driven answers in seconds.

Python 3.11+ MCP Protocol LangGraph License: MIT

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Architecture

┌─────────────────────────────────────────────────────────┐
│                   CLIENT LAYER                          │
│   Claude Desktop  │  Gradio UI  │  CLI  │  Telegram     │
└────────────────────────┬────────────────────────────────┘
                         │ MCP Protocol (JSON-RPC)
┌────────────────────────▼────────────────────────────────┐
│              LANGGRAPH AGENT (Orchestrator)              │
│  Multi-step reasoning · Report generation · Triage      │
│  Claude API · StateGraph · Human-in-the-loop            │
└────────────────────────┬────────────────────────────────┘
                         │ MCP Tool Calls
┌────────────────────────▼────────────────────────────────┐
│              FINWATCH MCP SERVER                        │
│                                                         │
│  ┌──────────────┐ ┌──────────────┐ ┌────────────────┐  │
│  │ get_portfolio │ │ analyze_risk │ │ detect_anomaly │  │
│  └──────────────┘ └──────────────┘ └────────────────┘  │
│  ┌──────────────┐ ┌──────────────┐ ┌────────────────┐  │
│  │search_filings│ │get_market_kpi│ │compliance_check│  │
│  └──────────────┘ └──────────────┘ └────────────────┘  │
└────────────────────────┬────────────────────────────────┘
                         │
┌────────────────────────▼────────────────────────────────┐
│                    DATA LAYER                            │
│  SQLite (prices, KPIs)  │  ChromaDB (SEC filings, RAG)  │
│  Alpha Vantage · Finnhub · FRED · SEC EDGAR             │
└─────────────────────────────────────────────────────────┘

Features

MCP Server Tools

Tool	Description
get_portfolio	Real-time portfolio status: holdings, P&L, sector allocation
analyze_risk	Risk metrics: VaR, Sharpe ratio, Beta, max drawdown
detect_anomaly	Flag unusual price movements, volume spikes, correlation breaks
search_filings	RAG-powered semantic search over SEC filings and earnings reports
get_market_kpi	Macro indicators: interest rates, inflation, sector performance
compliance_check	Validate portfolio against exposure limits and concentration rules

LangGraph Agent

• Multi-step reasoning: chains tool calls to answer complex questions
• Report generation: automated daily/weekly portfolio summaries
• Anomaly triage: investigates detected anomalies with root cause analysis
• Human-in-the-loop: asks for confirmation before high-impact actions

Quick Start

Prerequisites

• Python 3.11+
• uv (recommended) or pip
• API keys: Alpha Vantage (free), Finnhub (free), Anthropic (for agent)

Installation

# Clone the repo
git clone https://github.com/geraldo96/finwatch-mcp.git
cd finwatch-mcp

# Install with uv (recommended)
uv sync

# Or with pip
pip install -e ".[dev]"

# Copy environment template
cp .env.example .env
# Edit .env with your API keys

Run the MCP Server

# Start the MCP server (Streamable HTTP)
uv run python -m src.mcp_server.server

# The server runs on http://localhost:8080/mcp

Connect to Claude Desktop

Add to your claude_desktop_config.json:

{
  "mcpServers": {
    "finwatch": {
      "type": "http",
      "url": "http://localhost:8080/mcp"
    }
  }
}

Run the LangGraph Agent (standalone)

# Interactive CLI mode
uv run python -m src.agent.cli

# Example queries:
# > What's my current portfolio allocation?
# > Is my tech exposure within compliance limits?
# > Show me anomalies from the last week and explain them

Run with Docker

docker compose up
# MCP server: http://localhost:8080/mcp
# Gradio UI:  http://localhost:7860

Data Sources

Source	Data	API Key	Rate Limit (free)
Alpha Vantage	Stock prices, fundamentals	Free	25 req/day
Finnhub	Real-time quotes, news, sentiment	Free	60 req/min
FRED	Macro indicators, interest rates	Free	120 req/min
SEC EDGAR	10-K, 10-Q filings	None	10 req/sec
Yahoo Finance	Historical prices (backup)	None	Unofficial

Project Structure

finwatch-mcp/
├── src/
│   ├── mcp_server/
│   │   ├── server.py          # MCP server entrypoint (Streamable HTTP)
│   │   ├── tools/
│   │   │   ├── portfolio.py   # get_portfolio tool
│   │   │   ├── risk.py        # analyze_risk tool
│   │   │   ├── anomaly.py     # detect_anomaly tool
│   │   │   ├── filings.py     # search_filings tool (RAG)
│   │   │   ├── market_kpi.py  # get_market_kpi tool
│   │   │   └── compliance.py  # compliance_check tool
│   │   └── config.py          # Server configuration
│   ├── agent/
│   │   ├── graph.py           # LangGraph StateGraph definition
│   │   ├── nodes.py           # Agent nodes (reason, act, report)
│   │   ├── state.py           # Agent state schema
│   │   └── cli.py             # Interactive CLI client
│   ├── data/
│   │   ├── ingester.py        # Data fetching & sync logic
│   │   ├── models.py          # SQLAlchemy / Pydantic models
│   │   └── db.py              # Database connection & queries
│   └── rag/
│       ├── embeddings.py      # BAAI embedding pipeline
│       ├── indexer.py         # SEC filing indexer
│       └── retriever.py       # ChromaDB retrieval
├── tests/
│   ├── test_tools.py          # Unit tests for MCP tools
│   ├── test_agent.py          # Agent integration tests
│   └── test_data.py           # Data layer tests
├── scripts/
│   ├── seed_data.py           # Seed DB with sample portfolio
│   ├── ingest_filings.py      # Download & index SEC filings
│   └── demo.py                # Full demo walkthrough
├── docs/
│   ├── ARCHITECTURE.md        # Detailed architecture docs
│   └── TOOLS.md               # MCP tool specifications
├── docker-compose.yml
├── Dockerfile
├── pyproject.toml
├── .env.example
└── README.md

Development Roadmap

Week 1 — Foundation

• Project scaffold & CI setup
• MCP server with get_portfolio and analyze_risk tools
• SQLite data layer + Alpha Vantage / yfinance ingestion
• Sample portfolio seeding script

Week 2 — RAG & Anomaly Detection

• ChromaDB setup + SEC EDGAR filing indexer
• search_filings tool with BAAI embeddings
• detect_anomaly tool (z-score + rolling stats)
• get_market_kpi tool (FRED integration)

Week 3 — Agent & Orchestration

• LangGraph StateGraph with Claude API
• Multi-step reasoning chains
• compliance_check tool
• Interactive CLI client

Week 4 — Polish & Deploy

• Docker Compose (server + agent + Gradio UI)
• Comprehensive tests
• Demo video / GIF
• Hugging Face Space (optional)

Tech Stack

Layer	Technology
MCP Server	Python mcp SDK, Streamable HTTP
Agent	LangGraph, Claude API (Anthropic SDK)
Structured Data	SQLite + SQLAlchemy
Vector Store	ChromaDB + BAAI/bge-small-en-v1.5
Data Sources	Alpha Vantage, Finnhub, FRED, SEC EDGAR, yfinance
UI	Gradio (demo), Claude Desktop (production)
Deploy	Docker Compose
Testing	pytest, pytest-asyncio

Contributing

Contributions are welcome! Please read the contributing guidelines first.

License

MIT License — see LICENSE for details.

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Built by Geraldo Margjini as a portfolio project demonstrating MCP Server development, LangGraph agent orchestration, and financial data engineering.