Query financial markets with the Massive MCP server

In this video, we walk through the rebuilt Massive MCP server: what changed, why we rewrote it, and how to connect it to Claude Desktop so your agent can query accurate market data without managing a single endpoint schema. The original server registered one tool per endpoint. At 53 tools and 450 parameters, tool definitions alone consumed an estimated 15,000 tokens of context on every request. The rewrite collapses everything into 4 composable tools with 11 total parameters, cutting overhead significantly. Github Repo: github.com/massive-com/mcp_massive Key takeaways: - How composable tool design reduced MCP context overhead - How index search-based discovery lets your agent find the right endpoint without a static tool catalog - How to connect the Massive MCP server to Claude Desktop in seconds Chapters: 00:00 - Introduction 00:45 - Installation in Claude Desktop 01:00 - Demo: Querying daily price bars 01:24 - Demo: Options chain with Black-Scholes 01:53 - How it works under the hood You can find the blog that goes along with this video here: https://massive.com/blog/massive-rebuilds-mcp-server Disclaimer This content is for educational purposes only. Nothing in this post constitutes investment advice or a recommendation to buy or sell any securities or other financial instruments. . Massive is a market data provider, not a broker-dealer, exchange, or investment adviser. Market data accessed through Massive may originate from third-party exchanges and data providers or may be derived or calculated by Massive; in either case, it is subject to the applicable terms of your Massive subscription agreement. The data and code samples provided by Massive are offered on an "as-is" basis without any warranty of accuracy, completeness, or timeliness. You are solely responsible for your use of the data