How to connect Polygon to Claude

Connect Claude Web, Desktop and Cowork to Polygon MCP. Show the latest closing price for btc-usd, list all stock tickers traded on nasdaq, and more using natural language, with authentication handled for you.

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Polygon

Api Key

Polygon.io delivers real-time and historical APIs for stocks, crypto, forex, and options data. Get fast, reliable financial market data to power trading, research, and analytics.

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Introduction

Claude is Anthropic's AI assistant, available on the web, in the desktop app, and on mobile. Cowork is its agent for knowledge work, and it runs on all of those surfaces too. Connected to your apps, Claude can work with your files and services to accomplish complex tasks on your behalf.

This guide walks you through the easiest and most secure way to connect your Polygon account to Claude 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.

Setup is the same on Claude Web, Desktop, and Cowork, and you only need to do it once. The connector is tied to your account, so it's available in all three.

Also integrate Polygon with

OpenAI Agents SDK Claude Agent SDK Claude Code Codex OpenClaw Hermes Atomic Agent Google ADK LangChain Vercel AI SDK Mastra AI LlamaIndex CrewAI Pydantic AI AutoGen

Connecting Polygon to Claude Web, Desktop, and Cowork

Two ways to add the Composio connector. Pick whichever you prefer.

1. Add with one click

Click the button. Claude opens with the Composio connector filled in. Click Add, then go to step 2.

Add to Claude

Add manually

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

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

2. 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 Web, Desktop, and Cowork

3. Connect your Polygon account

Back in Claude, ask it to connect to Polygon or give it any Polygon-related task.

For example, ask Claude 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 Claude, and your Polygon account is ready to use.

What is the Polygon Claude Connector, 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.

Troubleshooting

1. Why does Claude not use the Composio connector for Polygon?

The connector can show as connected, but Claude must use it in each Polygon conversation.

Click + at the lower left of the chat, or type /.
Hover Connectors.
Turn on Composio.
Ask Claude to connect to Polygon again.

2. Why does Claude show an MCP server error before Polygon connects?

Claude can show Couldn't reach the MCP server or Authorization with the MCP server failed when you add the connector for Polygon.

Check that the connector URL is https://connect.composio.dev/mcp.
Connectors run from Anthropic's cloud, so your device network is usually not the problem.
Add the connector again from Customize > Connectors, then ask Claude to connect Polygon.
If it fails again, send the error and the ofid_ reference id to support@composio.dev.

3. Why does the Polygon authorization link not work?

The Composio connector is one server. Your Polygon account connects separately when Claude asks for it.

If the browser does not open, or the link expires, ask Claude to retry the Polygon connection.
Composio creates a fresh Polygon authorization link.
Open that link in your browser and finish the Polygon sign-in.

4. Why do Polygon actions fail after they worked before?

The Polygon connection can expire or lose permission.

Ask Claude to inspect the Polygon connection.
If the connection is unhealthy, disconnect it when Claude prompts you.
Reconnect the Polygon account and retry the action.
If Claude shows a permission prompt, approve it before Claude changes data in Polygon.
If the action still fails with a permission error, check that the connected account has that permission in Polygon itself.

5. How do I switch to a different Polygon account?

Claude can manage the Polygon connection for you.

Ask Claude to disconnect or delete the current Polygon account.
Ask Claude to connect Polygon again.
Open the new Composio authorization link for Polygon.
Sign in with the other Polygon account in the browser.
After the account connects, ask Claude to retry the Polygon task.

6. Why is my Polygon connection missing in Claude Desktop or on a Team plan?

The connector belongs to your Claude account, so your Polygon connection works in Claude Web, Desktop, and Cowork.

In Claude Desktop, open Customize > Connectors.
Next to Composio, click ⋮ and click Clear cache.
If Polygon tools still do not appear, click ⋮, disconnect, remove the connector, and add it again.
On Team or Enterprise, an Owner or Primary Owner must enable the connector before you can connect Polygon.

TOOLS

Supported Tools

Every Polygon action and event your agent gets out of the box.

Get 10-K Filing Sections

Tool to retrieve 10-K filing sections from the SEC.

Get Aggregates

Tool to fetch custom aggregate OHLCV bars for a stock.

Get All Tickers

Tool to retrieve all ticker symbols across asset classes.

Get Condition Codes

Tool to retrieve a unified list of trade and quote condition codes and their definitions.

Get Crypto Aggregates

Tool to retrieve aggregate bars for a cryptocurrency over a time range.

Get Crypto All Tickers Snapshot

Tool to retrieve snapshots for all cryptocurrency tickers.

Get Crypto EMA

Tool to calculate Exponential Moving Average (EMA) technical indicator for a crypto ticker.

Get Crypto Grouped Daily

Tool to retrieve daily grouped bars for all cryptocurrencies on a specified date.

Get Crypto Last Trade

Tool to retrieve the last trade for a specified cryptocurrency pair.

Get Crypto MACD

Tool to calculate Moving Average Convergence/Divergence (MACD) technical indicator for a crypto ticker.

Get Crypto Open/Close

Tool to fetch daily open and close prices for a given crypto pair on a specified date.

Get Crypto Previous Close

Tool to retrieve previous day’s close for a crypto ticker.

Get Crypto RSI

Tool to calculate the Relative Strength Index (RSI) for a cryptocurrency ticker.

Get Crypto SMA

Tool to calculate Simple Moving Average (SMA) technical indicator for a cryptocurrency ticker.

Get Crypto Ticker Book

Tool to retrieve the full L2 order book for a crypto ticker.

Get Crypto Trades

Tool to fetch historical trade data for a cryptocurrency ticker.

Get Dividends

Tool to retrieve dividend data for stocks.

Get Economy Inflation Indicators

Tool to retrieve key indicators of realized inflation including CPI and PCE price indexes.

Get Exponential Moving Average

Tool to retrieve the Exponential Moving Average for a stock ticker.

Get SEC Filing

Tool to retrieve SEC filing details by filing ID.

Get SEC Filing File

Tool to retrieve information about a specific SEC filing file.

Get Forex Aggregates

Tool to retrieve aggregate bars for a forex pair over a date range.

Get Forex EMA

Tool to calculate Exponential Moving Average (EMA) technical indicator for a forex pair.

Get Forex Grouped Daily Bars

Tool to retrieve daily grouped OHLC bars for all forex currency pairs on a specified date.

Get Forex Historical Quotes

Tool to retrieve historical forex quotes for a currency pair over a time range.

Get Forex Locales

Tool to list locales supported by Polygon's forex asset class.

Get Forex MACD

Tool to calculate Moving Average Convergence/Divergence (MACD) technical indicator for a forex pair.

Get Forex Previous Close

Tool to retrieve previous day's close for a forex ticker.

Get Forex Real-Time Currency Conversion

Tool to convert amounts between currency pairs using real-time forex rates.

Get Forex RSI

Tool to calculate the Relative Strength Index (RSI) technical indicator for a forex pair.

Get Forex SMA

Tool to calculate Simple Moving Average (SMA) technical indicator for a forex pair.

Get Forex Snapshot Losers

Tool to retrieve the current snapshot of the top losers in the forex market.

Get Futures Aggregates

Tool to retrieve historical OHLCV aggregates for a futures contract.

Get Futures Products

Tool to retrieve a comprehensive list of futures products with advanced filtering.

Get Futures Product Schedules

Tool to retrieve trading schedules for a futures product.

Get Futures Quotes

Tool to retrieve real-time quote data for a specified futures contract ticker.

Get Futures Schedules

Tool to retrieve futures trading schedules.

Get Futures Trades

Tool to retrieve tick-level trade data for a specified futures contract.

Get Historic Forex Ticks

Tool to get historic ticks for a currency pair on a specific date.

Get Inflation Expectations

Tool to retrieve inflation expectations data from the Federal Reserve based on Treasury yields and Cleveland Fed models.

Get IPO Data

Tool to retrieve comprehensive information on Initial Public Offerings (IPOs), including upcoming and historical events.

Get MACD

Tool to retrieve the Moving Average Convergence/Divergence (MACD) for a stock ticker.

Get Upcoming Market Holidays

Tool to retrieve upcoming market holidays and half-day closures.

Get Market Status

Tool to retrieve current market status.

Get Meta Conditions By Ticktype

Tool to retrieve condition code mappings for a specific tick type (trades or quotes).

Get News

Tool to retrieve recent news articles related to a ticker.

Get Stock Open/Close

Tool to fetch daily open and close prices for a stock on a specific date.

Get Option Chain Snapshot

Tool to fetch a real-time snapshot of all option contracts for an underlying asset.

Get Options Contract Overview

Tool to retrieve comprehensive details about a specific options contract including contract type, exercise style, expiration date, strike price, and underlying ticker.

Get Options Custom Bars

Tool to retrieve historical OHLC and volume data for options contracts over custom date ranges with configurable time windows.

Get Options EMA

Tool to calculate Exponential Moving Average (EMA) technical indicator for an options ticker.

Get Options MACD

Tool to calculate Moving Average Convergence/Divergence (MACD) technical indicator for an options ticker.

Get Option Snapshot

Tool to retrieve a real-time snapshot for a single option contract.

Get Options RSI

Tool to calculate Relative Strength Index (RSI) technical indicator for an options ticker.

Get Options SMA

Tool to calculate Simple Moving Average (SMA) technical indicator for an options ticker.

Get Previous Close

Tool to get previous trading day’s OHLC and volume for a stock.

Get reference exchanges

Tool to retrieve supported exchanges and their details.

Get reference markets

Tool to retrieve all supported markets from Polygon.

Get Reference Ticker Types

Tool to retrieve all ticker types supported by Polygon.

Get Related Companies

Tool to get a list of related companies for a ticker symbol based on various similarity metrics.

Get Risk Categories

Tool to retrieve risk factor taxonomy categories from SEC 10-K filings.

Get RSI

Tool to retrieve the Relative Strength Index (RSI) for a stock ticker.

Get Short Interest

Tool to retrieve bi-monthly aggregated short interest data for stocks reported to FINRA.

Get Short Volume

Tool to retrieve short volume data for stocks.

Get Simple Moving Average

Tool to retrieve the Simple Moving Average (SMA) for any ticker (stocks, forex, crypto).

Get All Stock Tickers Snapshot

Tool to retrieve the current market snapshot for all stock tickers.

Get Stock Snapshot Losers

Tool to retrieve the current snapshot of the top losers in the U.

Get Stock Snapshot Ticker

Tool to retrieve the current snapshot of a specific stock ticker.

Get Stock Splits

Tool to retrieve stock split events.

Get Stock Financials

Tool to retrieve historical financial data for a stock ticker from SEC filings.

Get Stock Float

Tool to retrieve stock float data showing the number and percentage of publicly tradable shares.

Get Stocks Balance Sheets

Tool to retrieve point-in-time balance sheet data including assets, liabilities, and equity from company SEC filings.

Get Stocks Cash Flow Statements

Tool to retrieve historical cash flow statement data from company SEC filings across quarterly, annual, and TTM frequencies.

Get Stocks Custom Bars

Tool to retrieve aggregated historical OHLC and volume data for a stock over custom date ranges with configurable time windows.

Get Stocks Daily Market Summary

Tool to retrieve daily OHLC, volume, and VWAP data for all U.

Get Stock Splits by Ticker

Tool 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 Details

Tool to retrieve detailed company information for a stock ticker.

Get Ticker Details

Tool 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 Events

Tool to retrieve corporate events for a specific ticker.

Get Ticker Types

Tool to retrieve all ticker types supported by Polygon.

Get Treasury Yields

Tool to retrieve historical U.

Get V1 Meta Crypto Exchanges

Tool to retrieve a list of cryptocurrency exchanges using the legacy v1 API.

Last Quote for a Symbol

Tool to retrieve the last quote tick for a given stock symbol.

Last Trade for a Currency Pair

Tool to retrieve the last trade tick for a currency pair in the forex market.

List SEC Filing Files

Tool to retrieve files associated with an SEC filing.

List Options Contracts

Tool to list and filter options contracts by underlying ticker, type, expiration, strike, and more.

List SEC Filings

Tool to retrieve SEC filings from Polygon.

FRAMEWORKS

How to build Polygon MCP Agent with another framework

OpenAI Agents SDK

Use Polygon MCP with OpenAI Agents SDK

Claude Agent SDK

Use Polygon MCP with Claude Agent SDK

Claude Code

Use Polygon MCP with Claude Code

Codex

Use Polygon MCP with Codex

OpenClaw

Use Polygon MCP with OpenClaw

Hermes

Use Polygon MCP with Hermes

Atomic Agent

Use Polygon MCP with Atomic Agent

Google ADK

Use Polygon MCP with Google ADK

LangChain

Use Polygon MCP with LangChain

Vercel AI SDK

Use Polygon MCP with Vercel AI SDK

Mastra AI

Use Polygon MCP with Mastra AI

LlamaIndex

Use Polygon MCP with LlamaIndex

CrewAI

Use Polygon MCP with CrewAI

Pydantic AI

Use Polygon MCP with Pydantic AI

AutoGen

Use Polygon MCP with AutoGen

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FAQ

Frequently asked questions

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.

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.

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.

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.

Start with Polygon.It takes 30 seconds.

Managed auth, hosted MCP servers, and every Polygon tool your agent needs.Free to start.

Start building

How to connect Polygon to Claude

Connect Polygon without auth hassles

Introduction

Also integrate Polygon with

Connecting Polygon to Claude Web, Desktop, and Cowork

1. Add with one click

Add manually

2. Authorize in your browser

3. Connect your Polygon account

What is the Polygon Claude Connector, and what's possible with it?

Troubleshooting

1. Why does Claude not use the Composio connector for Polygon?

2. Why does Claude show an MCP server error before Polygon connects?

3. Why does the Polygon authorization link not work?

4. Why do Polygon actions fail after they worked before?

5. How do I switch to a different Polygon account?

6. Why is my Polygon connection missing in Claude Desktop or on a Team plan?

Supported Tools

How to build Polygon MCP Agent with another framework

OpenAI Agents SDK

Claude Agent SDK

Claude Code

Codex

OpenClaw

Hermes

Atomic Agent

Google ADK

LangChain

Vercel AI SDK

Mastra AI

LlamaIndex

CrewAI

Pydantic AI

AutoGen

Explore Other Toolkits

Stripe

44API

Airwallex

Aiwyn Tax MCP

Frequently asked questions

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

Can I use Tool Router MCP with Claude Cowork?+

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

How safe is my data with Composio Tool Router?+

Start with Polygon.It takes 30 seconds.