# How to connect Bouncer to Claude Cowork

```json
{
  "title": "How to connect Bouncer to Claude Cowork",
  "toolkit": "Bouncer",
  "toolkit_slug": "bouncer",
  "framework": "Claude Cowork",
  "framework_slug": "claude-cowork",
  "url": "https://composio.dev/toolkits/bouncer/framework/claude-cowork",
  "markdown_url": "https://composio.dev/toolkits/bouncer/framework/claude-cowork.md",
  "updated_at": "2026-05-12T10:03:51.206Z"
}
```

## 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 Bouncer account to Cowork via Composio Connect, enabling it to verify this email address instantly, check domain validity for new signups, batch-verify a list of customer emails, and more such actions on your behalf without compromising your account security.

## Also integrate Bouncer with

- [OpenAI Agents SDK](https://composio.dev/toolkits/bouncer/framework/open-ai-agents-sdk)
- [Claude Agent SDK](https://composio.dev/toolkits/bouncer/framework/claude-agents-sdk)
- [Claude Code](https://composio.dev/toolkits/bouncer/framework/claude-code)
- [Codex](https://composio.dev/toolkits/bouncer/framework/codex)
- [OpenClaw](https://composio.dev/toolkits/bouncer/framework/openclaw)
- [Hermes](https://composio.dev/toolkits/bouncer/framework/hermes-agent)
- [CLI](https://composio.dev/toolkits/bouncer/framework/cli)
- [Google ADK](https://composio.dev/toolkits/bouncer/framework/google-adk)
- [LangChain](https://composio.dev/toolkits/bouncer/framework/langchain)
- [Vercel AI SDK](https://composio.dev/toolkits/bouncer/framework/ai-sdk)
- [Mastra AI](https://composio.dev/toolkits/bouncer/framework/mastra-ai)
- [LlamaIndex](https://composio.dev/toolkits/bouncer/framework/llama-index)
- [CrewAI](https://composio.dev/toolkits/bouncer/framework/crew-ai)

## Connect Bouncer to Claude Cowork

### Connecting Bouncer 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.
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 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 Bouncer through MCP without you sharing account credentials directly with the agent.

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

The Bouncer MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Bouncer account. It provides structured and secure access to your email verification and validation tools, so your agent can perform actions like real-time email validation, bulk verification, domain checks, and toxicity analysis for improved email deliverability.
- Real-time email verification: Instantly validate single email addresses to check deliverability and reduce bounce rates before sending messages.
- Bulk batch verification: Initiate, manage, and retrieve results from batch email verification jobs to clean and maintain large email lists efficiently.
- Toxicity analysis of email lists: Start and monitor toxicity analysis jobs to identify potentially harmful or problematic email addresses in your database.
- Domain verification: Check the validity and configuration of email domains, including MX records and catch-all status, to ensure emails reach their intended targets.
- Automated batch management: Finish, delete, or update batch verification and toxicity jobs to keep your verification workflows tidy and up-to-date.

## Supported Tools

| Tool slug | Name | Description |
|---|---|---|
| `BOUNCER_CHECK_TOXICITY_LIST_JOB_STATUS` | Check Toxicity List Job Status | Tool to check the status of a specific toxicity list job. Use after creating a toxicity list job to poll its status until completion. |
| `BOUNCER_CREATE_BATCH_REQUEST` | Create Batch Request | Initiates an asynchronous batch email verification request. Use when you have multiple emails to verify. Returns a batch ID for tracking - use BOUNCER_GET_BATCH_RESULTS to retrieve verification results after processing completes, or provide a callback URL. |
| `BOUNCER_CREATE_TOXICITY_LIST_JOB` | Create Toxicity List Job | Tool to create a toxicity analysis job for a list of email addresses. Use when you need to batch-process toxicity checks for multiple emails at once. |
| `BOUNCER_DELETE_BATCH_REQUEST` | Delete batch request | Deletes a batch email verification request and all associated emails and results. Use when you need to permanently remove batch data. This operation is idempotent - calling it multiple times on the same batch ID is safe and returns success. Data is automatically deleted by Bouncer after 60 days if not deleted manually. |
| `BOUNCER_DELETE_TOXICITY_LIST_JOB` | Delete Toxicity List Job | Tool to delete a specific toxicity list job. Use when you need to remove a completed or unwanted toxicity analysis job after confirming its ID. |
| `BOUNCER_FINISH_BATCH` | Finish Batch | Tool to mark a batch verification process as finished early. Use when you need to stop batch processing before all emails are verified and reclaim credits for unprocessed emails. IMPORTANT: The batch must be in 'processing' status - cannot finish a batch that is 'queued' or already 'completed'. |
| `BOUNCER_GET_BATCH_RESULTS` | Get Batch Results | Tool to retrieve the results of a batch verification process. Use after submitting a batch to fetch all processed email verification outcomes. Note: If the batch is still processing, the API will return a 405 status indicating results are not yet available. Wait for the batch to complete before retrieving results. |
| `BOUNCER_GET_CREDITS` | Get Credits | Tool to retrieve the current credit balance for the account. Use when you need to check available credits before performing verification operations. |
| `BOUNCER_VERIFY_DOMAIN` | Verify Domain | Tool to verify the validity and configuration of a domain. Use when you need to confirm the domain's MX records and catch-all behavior. |
| `BOUNCER_VERIFY_EMAIL` | Verify Email | Tool to verify a single email address in real-time. Use when validating email entry form inputs instantly. |

## Supported Triggers

None listed.

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

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

## Complete Code

None listed.

## How to build Bouncer MCP Agent with another framework

- [OpenAI Agents SDK](https://composio.dev/toolkits/bouncer/framework/open-ai-agents-sdk)
- [Claude Agent SDK](https://composio.dev/toolkits/bouncer/framework/claude-agents-sdk)
- [Claude Code](https://composio.dev/toolkits/bouncer/framework/claude-code)
- [Codex](https://composio.dev/toolkits/bouncer/framework/codex)
- [OpenClaw](https://composio.dev/toolkits/bouncer/framework/openclaw)
- [Hermes](https://composio.dev/toolkits/bouncer/framework/hermes-agent)
- [CLI](https://composio.dev/toolkits/bouncer/framework/cli)
- [Google ADK](https://composio.dev/toolkits/bouncer/framework/google-adk)
- [LangChain](https://composio.dev/toolkits/bouncer/framework/langchain)
- [Vercel AI SDK](https://composio.dev/toolkits/bouncer/framework/ai-sdk)
- [Mastra AI](https://composio.dev/toolkits/bouncer/framework/mastra-ai)
- [LlamaIndex](https://composio.dev/toolkits/bouncer/framework/llama-index)
- [CrewAI](https://composio.dev/toolkits/bouncer/framework/crew-ai)

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- [Fillout forms](https://composio.dev/toolkits/fillout_forms) - Fillout forms is an online platform for building and managing forms with a flexible API. It lets you create, distribute, and collect responses from forms with ease.
- [Formdesk](https://composio.dev/toolkits/formdesk) - Formdesk is an online form builder for creating and managing professional forms. It's perfect for collecting data, automating workflows, and integrating form submissions with your favorite services.
- [Formsite](https://composio.dev/toolkits/formsite) - Formsite lets you build online forms and surveys with drag-and-drop simplicity. Capture, manage, and integrate form responses securely for streamlined workflows.
- [Graphhopper](https://composio.dev/toolkits/graphhopper) - GraphHopper is an enterprise-grade Directions API for routing, optimization, and geocoding across multiple vehicle types. It enables fast, reliable route planning and logistics automation for businesses.
- [Hyperbrowser](https://composio.dev/toolkits/hyperbrowser) - Hyperbrowser is a next-generation platform for scalable browser automation. It empowers AI agents to interact with web apps, automate workflows, and handle browser sessions at scale.
- [La Growth Machine](https://composio.dev/toolkits/lagrowthmachine) - La Growth Machine automates multi-channel sales outreach and routine tasks for sales teams. Streamline your workflow and focus on closing more deals.
- [Leverly](https://composio.dev/toolkits/leverly) - Leverly is a workflow automation platform that connects and coordinates actions across your apps. It streamlines repetitive processes so your business runs smoother, faster, and with fewer manual steps.
- [Maintainx](https://composio.dev/toolkits/maintainx) - Maintainx is a cloud-based CMMS for centralizing maintenance data, communication, and workflows. It helps organizations streamline maintenance operations and improve team coordination.
- [Make](https://composio.dev/toolkits/make) - Make is an automation platform that connects your favorite apps and services. Build powerful, custom workflows without writing code.
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- [Persona](https://composio.dev/toolkits/persona) - Persona offers identity infrastructure to automate user verification and compliance. It helps organizations securely verify users and reduce fraud risk.

## Frequently Asked Questions

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

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

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

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

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