How to connect Fixer 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 Fixer account to Cowork via Composio Connect, enabling it to get today's USD to EUR exchange rate, show historical rates for GBP last week, list all supported currency symbols, and more such actions on your behalf without compromising your account security.

Also integrate Fixer with

Connecting Fixer 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 Fixer account

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

For example, ask Cowork to:

  • "Get today's USD to EUR exchange rate"
  • "Show historical rates for GBP last week"
  • "List all supported currency symbols"

It will prompt you to authenticate and authorize access.

That's it. Composio's tools are now available in Cowork, and your Fixer 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 Fixer through MCP without you sharing account credentials directly with the agent.

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

The Fixer MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Fixer account. It provides structured and secure access to real-time and historical foreign exchange data, so your agent can fetch current rates, check past currency values, and look up supported symbols with ease.

  • Live exchange rate retrieval: Instantly get the most up-to-date currency conversion rates for any supported global currency pair.
  • Historical currency data access: Ask your agent to pull exchange rates for specific dates in the past, making trend analysis and financial reporting effortless.
  • Supported currency symbol lookup: Quickly retrieve the full list of available currency codes and names to validate inputs or display options for users.
  • Multi-currency comparisons: Let your agent fetch and compare rates across multiple currencies at once to power financial dashboards or conversion tools.

Supported Tools & Triggers

Tools
Get Historical RatesTool to get historical exchange rate data for a specific date.
Get Latest Exchange RatesTool to get real-time exchange rate data for all available or specified currencies.
Get Supported SymbolsTool to retrieve all supported currency symbols and their full names.

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FAQ

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

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

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

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

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