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How to connect Basecamp to Claude

Connect Claude Web, Desktop and Cowork to Basecamp MCP. Create a new project for client onboarding, add a to-do item to the marketing team, and more using natural language, with authentication handled for you.

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Basecamp is a project management and team collaboration tool by 37signals. It helps teams organize tasks, share files, and communicate efficiently in one place.

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 Basecamp account to Claude via Composio Connect, enabling it to create a new project for client onboarding, add a to-do item to the marketing team, post a team-wide announcement in Campfire chat, 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.

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Connecting Basecamp to Claude Web, Desktop, and 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 Web, Desktop, and Cowork

4. Connect your Basecamp account

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

For example, ask Claude to:

  • "Create a new project for client onboarding"
  • "Add a to-do item to the marketing team"
  • "Post a team-wide announcement in Campfire chat"

It will prompt you to authenticate and authorize access.

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

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

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

Troubleshooting

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

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

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

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

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

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

3. Why does the Basecamp authorization link not work?

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

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

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

The Basecamp connection can expire or lose permission.

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

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

Claude can manage the Basecamp connection for you.

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

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

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

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

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VS Code logo

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FAQ

Frequently asked questions

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

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

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