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How to connect Finnhub to Claude

Connect Claude Web, Desktop and Cowork to Finnhub MCP. Get latest price for aapl, list company financials for tsla, and more using natural language, with authentication handled for you.

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Finnhub is a market data API delivering real-time quotes, company fundamentals, and financial news. Use it to power trading apps, research, alerts, and analytics with timely market intelligence.

11 Tools

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 Finnhub account to Claude via Composio Connect, enabling it to get latest price for AAPL, list company financials for TSLA, summarize today's market-moving news headlines, 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 Finnhub with

ChatGPT WorkHermes

Connecting Finnhub 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 Finnhub account

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

For example, ask Claude to:

  • "Get latest price for AAPL"
  • "List company financials for TSLA"
  • "Summarize today's market-moving news headlines"

It will prompt you to authenticate and authorize access.

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

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

The Finnhub MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Finnhub account. It provides structured and secure access so your agent can perform Finnhub operations on your behalf.

Troubleshooting

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

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

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

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

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

  • 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 Finnhub.
  • If it fails again, send the error and the ofid_ reference id to support@composio.dev.

3. Why does the Finnhub authorization link not work?

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

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

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

The Finnhub connection can expire or lose permission.

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

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

Claude can manage the Finnhub connection for you.

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

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

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

  • In Claude Desktop, open Customize > Connectors.
  • Next to Composio, click ⋮ and click Clear cache.
  • If Finnhub 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 Finnhub.
TOOLS

Supported Tools

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

Get Company Financial Metrics

Get Finnhub's current key ratios and annual or quarterly metric series for one company.

Get Company Profile

Look up a company profile by exactly one ticker, ISIN, or CUSIP.

Get Market Status

Check whether an exchange is open now and identify its current session, timezone, or holiday.

Get Quote

Get the latest price snapshot for one Finnhub symbol.

Get Quotes

Get price snapshots for 1-10 Finnhub symbols in one tool call.

Get Reported Financials

Retrieve as-reported balance-sheet, cash-flow, and income-statement data for a company or filing.

List Calendar Events

List earnings releases or IPO events in an ordered date range.

List Earnings Results

List a company's recent actual versus estimated earnings and surprise values.

List SEC Filings

List SEC filing metadata; a ticker, CIK, or accession number is required, optionally filtered by form and an ordered date range.

Search News

Get broad market news by category or company-specific news for an ordered date range.

Search Symbols

Find tradable symbols by ticker, company name, ISIN, or CUSIP, optionally restricted to an exchange.

FRAMEWORKS

How to build Finnhub MCP Agent with another framework

ChatGPT Work logo

ChatGPT Work

Use Finnhub MCP with ChatGPT Work

Hermes logo

Hermes

Use Finnhub MCP with Hermes

FAQ

Frequently asked questions

With a standalone Finnhub MCP server, the agents and LLMs can only access a fixed set of Finnhub tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Finnhub 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 Finnhub tools.

Yes, absolutely. You can configure which Finnhub 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 Finnhub data and credentials are handled as safely as possible.

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