Moved to Massive.com:

The upstream server moved from Polygon.io to Massive.com. See the Massive.com MCP server.

Overview

The Massive.com MCP Server provides AI assistants with access to the Massive.com financial data API through a composable MCP interface.

Official MCP Server:

The Massive.com server exposes API search, API calls, and SQL queries as MCP tools.

Key Features

⚡

Real-Time Trades & Quotes

Stream real-time trade data and NBBO quotes for stocks and options with sub-second latency

📊

OHLCV Aggregates

Get open, high, low, close, and volume bars for any time window from 1 minute to 1 month

📋

Company Financials

Access detailed financial data including income statements, balance sheets, and cash flow reports

🔲

Options Data

Track options contracts, chains, and pricing data for equity and index options

📈

Market Snapshot

Get a comprehensive snapshot of market movers, gainers, losers, and most active stocks

🔍

Ticker Search

Search and discover ticker symbols with company details, types, and market identifiers

Available Tools

Quick Reference

Tool	Purpose
`search_endpoints`	Search for API endpoints and built-in functions by natural-language query
`call_api`	Call a Massive.com REST API endpoint
`query_data`	Run SQL queries against data stored in the in-memory SQLite database

Detailed Usage

The upstream server exposes these three composable tools rather than individual endpoint-specific tools.

Installation

Install the server once:

uv tool install "mcp_massive @ git+https://github.com/massive-com/mcp_massive@v0.10.0"

{
  "mcpServers": {
    "massive": {
      "command": "mcp_massive",
      "env": {
        "MASSIVE_API_KEY": "your_api_key"
      }
    }
  }
}

API Key Required:

Get a Massive.com API key at Massive.com

Use Cases

Technical Charting

Ask AI to pull aggregate price data and identify chart patterns, support/resistance levels, and trends.

Options Analysis

Have AI analyze options chains, calculate implied volatility, and identify unusual options activity.

Earnings Analysis

Pull company financials and have AI summarize earnings trends, margins, and growth metrics.

Market Scanning

Scan for market movers, identify sector rotation, and surface unusual trading activity.

Sources

https://github.com/massive-com/mcp_massive

Polygon.io MCP Server