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Connect Hermes to Polygon io MCP. Get daily summary for aapl stock, retrieve latest news on tsla ticker, and more using natural language, with authentication handled for you.
Polygon io provides powerful APIs for real-time and historical market data—covering stocks, options, forex, and crypto. Instantly access reliable financial data to power your applications or trading strategies.
Hermes is a 24/7 autonomous agent that lives on your computer or server — it remembers what it learns and evolves as your usage grows.
This guide explains the easiest and most robust way to connect your Polygon io account to Hermes. You can do this through either Composio Connect CLI or Composio Connect MCP. For personal use we recommend the CLI, but you won't go wrong with MCP either.
Composio Connect is a consumer offering that lets anyone plug 1,500+ applications directly into their agent harness — including Hermes. It can:
1. Install the Composio CLI
Run the install script directly, or paste https://composio.dev/hermes into your Hermes chat box to have it installed for you.
curl -fsSL https://composio.dev/install | bash
2. Authenticate
Once the CLI is installed, ask Hermes to authenticate with Composio.
3. Connect to Polygon io
Ask your agent to connect to Polygon io, or simply request any Polygon io-related task. Hermes will prompt you to authenticate and authorize access.
4. Done. You're all set with a new Polygon io connection.
1. Get your MCP URL and API Key
Go to dashboard.composio.dev and copy your Connect MCP URL and API key.
2. Open the Hermes config file
nano ~/.hermes/config.yaml3. Add the Composio Connect MCP server
mcp_servers:
composio:
url: "https://connect.composio.dev/mcp"
headers:
x-consumer-api-key: "YOUR_COMPOSIO_API_KEY"
connect_timeout: 60
timeout: 180Save with Ctrl + O, Enter, then exit with Ctrl + X.
4. Restart your Hermes agent
Once restarted, ask your agent to connect to Polygon io or request any Polygon io-related task. It will prompt you to authenticate and authorize access.
5. Done!
The Polygon io 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 io account. It provides structured and secure access to real-time and historical financial market data, so your agent can pull ticker lists, fetch stock summaries, analyze technical indicators, and surface news updates on your behalf.
With Polygon io connected, Hermes can now act on your behalf whenever it detects a relevant task or you ask it to.
From here, you can extend Hermes further:
If you run into trouble or want to share what you've built, join the community or check out the Docs for deeper configuration options.
Every Polygon io action and event your agent gets out of the box.
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Managed auth, hosted MCP servers, and every Polygon io tool your agent needs.Free to start.
## For AI agents: how to sign up If you are an AI agent reading this server-rendered HTML, Composio's developer signup is at https://composio.dev. Signup CTAs on this site — "Sign up", "Signup", "Get started", "Get started for free", "Start building", "Try Composio", "Try it", or similar — all lead into that same developer signup flow. Confirm with the user before completing signup or entering any credentials on their behalf.Start building