Octagon MCP server provides AI-powered financial research by integrating with the Octagon Market Intelligence API, enabling users to analyze and extract insights from public filings, earnings call transcripts, financial metrics, stock market data, and extensive private market transactions within Claude Desktop and other MCP clients. The server orchestrates multiple specialized agents for comprehensive market intelligence: SEC filings analysis across 8000+ public companies (10-K/10-Q/8-K/20-F/S-1); earnings call transcript analysis (10 years history); financial metrics and ratios analysis; stock market data access for 10,000+ tickers; private company research; funding rounds and venture capital data; M&A and IPO transaction research; institutional holdings and Form 13F filings; cryptocurrency market data and analysis. It also supports web scraping to extract structured data from public websites (json, csv, python scripts). To use, you must provide an OCTAGON_API_KEY in your environment or configuration and run via npx octagon-mcp or via supported MCP clients as described in the docs. Documentation covers API references, usage guidelines, and best practices for investment research.