# How to connect Formilla to Claude

```json
{
  "title": "How to connect Formilla to Claude",
  "toolkit": "Formilla",
  "toolkit_slug": "formilla",
  "framework": "Claude Cowork",
  "framework_slug": "claude-cowork",
  "url": "https://composio.dev/toolkits/formilla/framework/claude-cowork",
  "markdown_url": "https://composio.dev/toolkits/formilla/framework/claude-cowork.md",
  "updated_at": "2026-09-09T05:36:29.750Z"
}
```

## 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 Formilla account to Claude via Composio Connect, enabling it to create a new contact from chat, update contact email and subscription status, list contacts created in last week, 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 Formilla with

- [ChatGPT Work](https://composio.dev/toolkits/formilla/framework/chatgpt)
- [Hermes](https://composio.dev/toolkits/formilla/framework/hermes-agent)

## Connect Formilla to Claude Cowork

### Connecting Formilla 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.
2. Add the Composio MCP server
Click Add custom connector and paste in the Composio MCP server URL:

```bash
https://connect.composio.dev/mcp
```

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

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

## Supported Tools

| Tool slug | Name | Description |
|---|---|---|
| `FORMILLA_UPSERT_CONTACT` | Upsert Contact | Create a Formilla contact or overwrite supplied fields on an existing contact matched by user ID first, then email. Returns no contact data, ID, or create-versus-update result. |

## Supported Triggers

None listed.

## Troubleshooting

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

The connector can show as connected, but Claude must use it in each Formilla conversation.
- Click + at the lower left of the chat, or type /.
- Hover Connectors.
- Turn on Composio.
- Ask Claude to connect to Formilla again.

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

Claude can show Couldn't reach the MCP server or Authorization with the MCP server failed when you add the connector for Formilla.
- 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 Formilla.
- If it fails again, send the error and the ofid_ reference id to support@composio.dev.

### 3. Why does the Formilla authorization link not work?

The Composio connector is one server. Your Formilla account connects separately when Claude asks for it.
- If the browser does not open, or the link expires, ask Claude to retry the Formilla connection.
- Composio creates a fresh Formilla authorization link.
- Open that link in your browser and finish the Formilla sign-in.

### 4. Why do Formilla actions fail after they worked before?

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

### 5. How do I switch to a different Formilla account?

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

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

The connector belongs to your Claude account, so your Formilla connection works in Claude Web, Desktop, and Cowork.
- In Claude Desktop, open Customize > Connectors.
- Next to Composio, click ⋮ and click Clear cache.
- If Formilla 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 Formilla.

## Creating MCP Server - Stand-alone vs Composio SDK

The Formilla MCP server connects Claude Web, Desktop, and Cowork to your Formilla account through Composio. Once connected, Claude can use the available Formilla tools and triggers to complete tasks on your behalf.

## Complete Code

None listed.

## How to build Formilla MCP Agent with another framework

- [ChatGPT Work](https://composio.dev/toolkits/formilla/framework/chatgpt)
- [Hermes](https://composio.dev/toolkits/formilla/framework/hermes-agent)

## Related Toolkits

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- [Clay MCP](https://composio.dev/toolkits/clay_mcp) - Clay MCP is a prospect enrichment service for researching companies and contacts. It runs enrichment providers and Clay functions to return enriched prospect data.
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- [Close MCP](https://composio.dev/toolkits/close_mcp) - Close MCP is a CRM MCP exposing leads, contacts, opportunities, activities, communications, and workflows. Use it to give agents scoped, auditable access to your CRM data.

## Frequently Asked Questions

### What are the differences in Tool Router MCP and Formilla MCP?

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

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

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

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