How to Use the Mailtrap MCP in Claude Code

Q: How do I configure the Mailtrap MCP server in Claude Code?

Run claude mcp add --transport http mailtrap-mcp -- in your terminal. Make sure to place all flags before the server name. You can verify the installation by typing claude mcp list.

Q: Can Claude Code read the HTML of Mailtrap test messages?

Yes. The CLI agent uses getmessagehtml to fetch the exact markup of any trapped email. This is perfect for headless CI environments where you need to validate template rendering without a browser.

Q: How do I automate Mailtrap inbox cleanup with Claude Code?

You instruct the agent to use clearsandboxinbox before or after your test suites run. It empties the virtual environment instantly, ensuring your next pipeline execution starts with a clean slate.

Q: Can Claude Code verify my Mailtrap domain settings?

It handles domain audits easily. The agent calls listverifieddomains to map your senders, then uses getdomainstatus to check the specific DNS configuration of any domain you specify.

Automate Mailtrap email testing directly from your terminal. Claude Code executes sandbox checks, verifies domains, and manages inboxes via CLI.

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Create your Vinkius account to connect Mailtrap to Claude Code and route execution through our secure gateway. The platform manages server hosting, runtime updates, and security layers. Configuration requires no manual server provisioning.

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Setup Mailtrap with Claude Code

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Headless Mailtrap MCP Server Integration

CI/CD pipelines require zero-friction email validation. Claude Code operates entirely in the terminal, giving you a headless way to interact with your testing infrastructure through this MCP Server. You can script it to run `send_test_email` during a build step to verify your notification service is actually firing. Once the test triggers, the CLI agent doesn't need a UI to check the results. It executes `list_sandbox_messages` to confirm the payload arrived. If you need to inspect the exact headers or routing data, it pulls everything via `get_message_details` right into your standard output.

Validate HTML and Clear Sandboxes

Automated rendering checks save you from deploying broken layouts. Claude Code can pull the raw markup of any test message using `get_message_html`. You can pipe this output into other shell tools or let the agent analyze the CSS structure for common email client quirks. Keeping your test environments clean is just as important. Before a major integration suite runs, you can instruct the agent to run `clear_sandbox_inbox`. If a specific cron job fails and leaves garbage behind, `delete_sandbox_message` handles the cleanup without manual intervention.

Monitor Production Domains and Accounts

Managing sender reputation starts with DNS health. You can ask Claude Code to audit your infrastructure directly from the command line. It uses `list_verified_domains` to grab your active senders and runs `get_domain_status` to spot missing SPF or DKIM records. Navigating complex team setups is straightforward. The agent maps your organization by chaining `list_accessible_accounts` and `list_mailtrap_projects`. When you need to push a real notification from a deployment script, it can execute `send_production_email` using the correct verified domain.

Setup guide

Set up Mailtrap MCP in Claude Code

Prerequisites

Claude Code CLI installed (npm install -g @anthropic-ai/claude-code)
Active Vinkius subscription with a valid endpoint token

1

Run the add command

Open your terminal and run the command shown on the right. Replace [YOUR_TOKEN_HERE] with your endpoint token from cloud.vinkius.com. Use --scope user to make it available across all projects.
2

Verify the connection

Start a Claude Code session and type /mcp to list connected servers. You should see mailtrap-mcp with a green status indicator.
3

Start using tools

Ask Claude Code something like "Check my latest Mailtrap transactions." It will automatically discover and invoke the available Mailtrap tools.

Terminal

claude mcp add --transport http mailtrap-mcp https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp

Get your connection token →

Prerequisites

Claude Code CLI installed
Active Vinkius subscription with a valid endpoint token

1

Open the config file

Create or edit .mcp.json in your project root for project-level scope, or ~/.claude.json for user-level scope.
2

Add the Mailtrap MCP

Paste the JSON snippet shown on the right into the mcpServers object. Replace [YOUR_TOKEN_HERE] with your endpoint token from cloud.vinkius.com.
3

Restart Claude Code

Start a new Claude Code session. Type /mcp to confirm the server is connected. The tools will be automatically available in your conversation.

.mcp.json

{
  "mcpServers": {
    "mailtrap-mcp": {
      "type": "url",
      "url": "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
    }
  }
}

Get your connection token →

Independent Platform Disclaimer: Vinkius is an independent platform and is not affiliated with, endorsed by, sponsored by, verified by, or otherwise authorized by Mailtrap. All third-party trademarks, logos, and brand names are the property of their respective owners. Their use on this website is strictly for informational purposes to identify service compatibility and interoperability.

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Common questions about Mailtrap MCP in Claude Code

Run `claude mcp add --transport http mailtrap-mcp -- ` in your terminal. Make sure to place all flags before the server name. You can verify the installation by typing `claude mcp list`.

Yes. The CLI agent uses `get_message_html` to fetch the exact markup of any trapped email. This is perfect for headless CI environments where you need to validate template rendering without a browser.

You instruct the agent to use `clear_sandbox_inbox` before or after your test suites run. It empties the virtual environment instantly, ensuring your next pipeline execution starts with a clean slate.

It handles domain audits easily. The agent calls `list_verified_domains` to map your senders, then uses `get_domain_status` to check the specific DNS configuration of any domain you specify.

Your terminal agent accesses sandbox metadata, project IDs, and message HTML strictly through the authenticated Mailtrap MCP Server connection. The tool processes these payloads locally in your CLI environment to validate test runs, ensuring no message content is stored outside your designated infrastructure.

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