How to connect Polygon to Claude Cowork

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Introduction

Cowork is Anthropic's AI agent for knowledge work. Think of it as Claude Code for everything else. It works autonomously with your computer, local files, and applications to accomplish complex tasks.

This guide walks you through the easiest and most secure way to connect your Polygon account to Cowork via Composio Connect, enabling it to show the latest closing price for BTC-USD, list all stock tickers traded on NASDAQ, get the crypto RSI for ETH over 14 days, and more such actions on your behalf without compromising your account security.

Also integrate Polygon with

Connecting Polygon to Claude Cowork

1. Open Customize

In Claude Desktop, click Customize in the left sidebar, then select Connectors and click the + icon at the top.

Claude Desktop connectors screen with Add custom connector selected

2. Add the Composio MCP server

Click Add custom connector and paste in the Composio MCP server URL:

bash
https://connect.composio.dev/mcp
Add custom connector dialog with Composio MCP server URL

3. Authorize in your browser

Click Connect. You'll be redirected to a browser window where you can authorize Composio to continue.

Composio authorization screen for Claude Cowork

4. Connect your Polygon account

Back in Cowork, ask the agent to connect to Polygon or give it any Polygon-related task.

For example, ask Cowork to:

  • "Show the latest closing price for BTC-USD"
  • "List all stock tickers traded on NASDAQ"
  • "Get the crypto RSI for ETH over 14 days"

It will prompt you to authenticate and authorize access.

That's it. Composio's tools are now available in Cowork, and your Polygon account is ready to use.

What is Claude Cowork?

Claude Cowork is Anthropic's agent for general knowledge work. It can use your computer, files, and connected applications to complete longer-running tasks across your work tools.

With Composio Connect, Cowork can securely access apps like Polygon through MCP without you sharing account credentials directly with the agent.

What is the Polygon MCP server, and what's possible with it?

The Polygon MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Polygon account. It provides structured and secure access to real-time and historical financial market data, so your agent can retrieve market status, analyze price indicators, track dividends, and monitor crypto and stock tickers on your behalf.

  • Market status and holiday tracking: Instantly check if U.S. exchanges are open or closed and retrieve upcoming market holidays or early closures to plan trading activities.
  • Comprehensive ticker retrieval: Ask your agent to fetch all available ticker symbols across asset classes, including stocks, crypto, forex, and options, filtered by market or exchange.
  • Crypto technical analysis: Have your agent calculate moving averages (EMA, SMA), MACD, and RSI indicators for specific cryptocurrencies to support informed trading decisions.
  • Daily and historical price fetching: Let your agent retrieve daily open/close prices, previous day’s close, or detailed price history for cryptocurrencies and stocks with just a prompt.
  • Dividend data extraction: Effortlessly access up-to-date corporate dividend information for stocks, enabling portfolio reviews and income analysis.

Supported Tools & Triggers

Tools
Get 10-K Filing SectionsTool to retrieve 10-K filing sections from the SEC.
Get AggregatesTool to fetch custom aggregate OHLCV bars for a stock.
Get All TickersTool to retrieve all ticker symbols across asset classes.
Get Condition CodesTool to retrieve a unified list of trade and quote condition codes and their definitions.
Get Crypto AggregatesTool to retrieve aggregate bars for a cryptocurrency over a time range.
Get Crypto All Tickers SnapshotTool to retrieve snapshots for all cryptocurrency tickers.
Get Crypto EMATool to calculate Exponential Moving Average (EMA) technical indicator for a crypto ticker.
Get Crypto Grouped DailyTool to retrieve daily grouped bars for all cryptocurrencies on a specified date.
Get Crypto Last TradeTool to retrieve the last trade for a specified cryptocurrency pair.
Get Crypto MACDTool to calculate Moving Average Convergence/Divergence (MACD) technical indicator for a crypto ticker.
Get Crypto Open/CloseTool to fetch daily open and close prices for a given crypto pair on a specified date.
Get Crypto Previous CloseTool to retrieve previous day’s close for a crypto ticker.
Get Crypto RSITool to calculate the Relative Strength Index (RSI) for a cryptocurrency ticker.
Get Crypto SMATool to calculate Simple Moving Average (SMA) technical indicator for a cryptocurrency ticker.
Get Crypto Ticker BookTool to retrieve the full L2 order book for a crypto ticker.
Get Crypto TradesTool to fetch historical trade data for a cryptocurrency ticker.
Get DividendsTool to retrieve dividend data for stocks.
Get Economy Inflation IndicatorsTool to retrieve key indicators of realized inflation including CPI and PCE price indexes.
Get Exponential Moving AverageTool to retrieve the Exponential Moving Average for a stock ticker.
Get SEC FilingTool to retrieve SEC filing details by filing ID.
Get SEC Filing FileTool to retrieve information about a specific SEC filing file.
Get Forex AggregatesTool to retrieve aggregate bars for a forex pair over a date range.
Get Forex EMATool to calculate Exponential Moving Average (EMA) technical indicator for a forex pair.
Get Forex Grouped Daily BarsTool to retrieve daily grouped OHLC bars for all forex currency pairs on a specified date.
Get Forex Historical QuotesTool to retrieve historical forex quotes for a currency pair over a time range.
Get Forex LocalesTool to list locales supported by Polygon's forex asset class.
Get Forex MACDTool to calculate Moving Average Convergence/Divergence (MACD) technical indicator for a forex pair.
Get Forex Previous CloseTool to retrieve previous day's close for a forex ticker.
Get Forex Real-Time Currency ConversionTool to convert amounts between currency pairs using real-time forex rates.
Get Forex RSITool to calculate the Relative Strength Index (RSI) technical indicator for a forex pair.
Get Forex SMATool to calculate Simple Moving Average (SMA) technical indicator for a forex pair.
Get Forex Snapshot LosersTool to retrieve the current snapshot of the top losers in the forex market.
Get Futures AggregatesTool to retrieve historical OHLCV aggregates for a futures contract.
Get Futures ProductsTool to retrieve a comprehensive list of futures products with advanced filtering.
Get Futures Product SchedulesTool to retrieve trading schedules for a futures product.
Get Futures QuotesTool to retrieve real-time quote data for a specified futures contract ticker.
Get Futures SchedulesTool to retrieve futures trading schedules.
Get Futures TradesTool to retrieve tick-level trade data for a specified futures contract.
Get Historic Forex TicksTool to get historic ticks for a currency pair on a specific date.
Get Inflation ExpectationsTool to retrieve inflation expectations data from the Federal Reserve based on Treasury yields and Cleveland Fed models.
Get IPO DataTool to retrieve comprehensive information on Initial Public Offerings (IPOs), including upcoming and historical events.
Get MACDTool to retrieve the Moving Average Convergence/Divergence (MACD) for a stock ticker.
Get Upcoming Market HolidaysTool to retrieve upcoming market holidays and half-day closures.
Get Market StatusTool to retrieve current market status.
Get Meta Conditions By TicktypeTool to retrieve condition code mappings for a specific tick type (trades or quotes).
Get NewsTool to retrieve recent news articles related to a ticker.
Get Stock Open/CloseTool to fetch daily open and close prices for a stock on a specific date.
Get Option Chain SnapshotTool to fetch a real-time snapshot of all option contracts for an underlying asset.
Get Options Contract OverviewTool to retrieve comprehensive details about a specific options contract including contract type, exercise style, expiration date, strike price, and underlying ticker.
Get Options Custom BarsTool to retrieve historical OHLC and volume data for options contracts over custom date ranges with configurable time windows.
Get Options EMATool to calculate Exponential Moving Average (EMA) technical indicator for an options ticker.
Get Options MACDTool to calculate Moving Average Convergence/Divergence (MACD) technical indicator for an options ticker.
Get Option SnapshotTool to retrieve a real-time snapshot for a single option contract.
Get Options RSITool to calculate Relative Strength Index (RSI) technical indicator for an options ticker.
Get Options SMATool to calculate Simple Moving Average (SMA) technical indicator for an options ticker.
Get Previous CloseTool to get previous trading day’s OHLC and volume for a stock.
Get reference exchangesTool to retrieve supported exchanges and their details.
Get reference marketsTool to retrieve all supported markets from Polygon.
Get Reference Ticker TypesTool to retrieve all ticker types supported by Polygon.
Get Related CompaniesTool to get a list of related companies for a ticker symbol based on various similarity metrics.
Get Risk CategoriesTool to retrieve risk factor taxonomy categories from SEC 10-K filings.
Get RSITool to retrieve the Relative Strength Index (RSI) for a stock ticker.
Get Short InterestTool to retrieve bi-monthly aggregated short interest data for stocks reported to FINRA.
Get Short VolumeTool to retrieve short volume data for stocks.
Get Simple Moving AverageTool to retrieve the Simple Moving Average (SMA) for any ticker (stocks, forex, crypto).
Get All Stock Tickers SnapshotTool to retrieve the current market snapshot for all stock tickers.
Get Stock Snapshot LosersTool to retrieve the current snapshot of the top losers in the U.
Get Stock Snapshot TickerTool to retrieve the current snapshot of a specific stock ticker.
Get Stock SplitsTool to retrieve stock split events.
Get Stock FinancialsTool to retrieve historical financial data for a stock ticker from SEC filings.
Get Stock FloatTool to retrieve stock float data showing the number and percentage of publicly tradable shares.
Get Stocks Balance SheetsTool to retrieve point-in-time balance sheet data including assets, liabilities, and equity from company SEC filings.
Get Stocks Cash Flow StatementsTool to retrieve historical cash flow statement data from company SEC filings across quarterly, annual, and TTM frequencies.
Get Stocks Custom BarsTool to retrieve aggregated historical OHLC and volume data for a stock over custom date ranges with configurable time windows.
Get Stocks Daily Market SummaryTool to retrieve daily OHLC, volume, and VWAP data for all U.
Get Stock Splits by TickerTool to retrieve historical stock splits for a specific ticker symbol.
Get Simple Moving Average (SMA)Tool to fetch Simple Moving Average (SMA) for a given stock ticker.
Get Ticker Company DetailsTool to retrieve detailed company information for a stock ticker.
Get Ticker DetailsTool to retrieve detailed information for a ticker.
Get Ticker Details (vX)Tool to retrieve comprehensive details for a specific ticker symbol using Polygon's vX API.
Get Ticker EventsTool to retrieve corporate events for a specific ticker.
Get Ticker TypesTool to retrieve all ticker types supported by Polygon.
Get Treasury YieldsTool to retrieve historical U.
Get V1 Meta Crypto ExchangesTool to retrieve a list of cryptocurrency exchanges using the legacy v1 API.
Last Quote for a SymbolTool to retrieve the last quote tick for a given stock symbol.
Last Trade for a Currency PairTool to retrieve the last trade tick for a currency pair in the forex market.
List SEC Filing FilesTool to retrieve files associated with an SEC filing.
List Options ContractsTool to list and filter options contracts by underlying ticker, type, expiration, strike, and more.
List SEC FilingsTool to retrieve SEC filings from Polygon.

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FAQ

What are the differences in Tool Router MCP and Polygon MCP?

With a standalone Polygon MCP server, the agents and LLMs can only access a fixed set of Polygon tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Polygon and many other apps based on the task at hand, all through a single MCP endpoint.

Can I use Tool Router MCP with Claude Cowork?

Yes, you can. Claude Cowork fully supports MCP integration. You get structured tool calling, message history handling, and model orchestration while Tool Router takes care of discovering and serving the right Polygon tools.

Can I manage the permissions and scopes for Polygon while using Tool Router?

Yes, absolutely. You can configure which Polygon scopes and actions are allowed when connecting your account to Composio. You can also bring your own OAuth credentials or API configuration so you keep full control over what the agent can do.

How safe is my data with Composio Tool Router?

All sensitive data such as tokens, keys, and configuration is fully encrypted at rest and in transit. Composio is SOC 2 Type 2 compliant and follows strict security practices so your Polygon data and credentials are handled as safely as possible.

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