How to Use the Mailosaur MCP in Claude Code

Q: How do I add the Mailosaur MCP server to Claude Code?

Run claude mcp add --transport http mailosaur -- in your terminal. This registers the server and saves the configuration directly to your local /.claude.json file.

Q: How do I delete old messages from the terminal?

Call deletespecificmessage with the target message ID to remove it permanently. You can also wipe the entire inbox at once by executing clearserverinbox.

Run headless email and SMS verification directly from your terminal or CI/CD pipelines using Claude Code and this MCP server.

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Connect Mailosaur MCP to Claude Code

Create your Vinkius account to connect Mailosaur 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 Mailosaur with Claude Code

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Pipe Mailosaur outputs in Claude Code

The `get_message_content` tool allows Claude Code to fetch raw email payloads and pipe them directly into terminal utilities. You can query a specific message and have Claude Code parse the HTML or text body using standard command-line tools. This works perfectly with `search_server_messages`, letting you filter incoming emails by sender or subject directly from your shell. It eliminates the need to open a browser or write complex API wrapper scripts just to check a verification code.

Headless inbox management via MCP Server

The `clear_server_inbox` tool allows Claude Code to reset your testing environments during automated deployment scripts. You can trigger a purge of all virtual inbox contents before running a new suite of integration tests. If your script needs a brand-new environment, Claude Code calls `create_virtual_server` to provision one instantly. It then outputs the new server ID to stdout, allowing you to pass it directly to downstream test runners.

Verify server statuses in Claude Code

The `list_virtual_servers` tool lets you inspect your entire testing infrastructure from a single terminal command. Claude Code lists all active servers, allowing you to quickly audit which environments are currently running. You can then query `get_server_details` to inspect specific server configurations or find active SMTP endpoints. This makes debugging broken mail relays during an SSH session incredibly fast and straightforward.

Setup guide

Set up Mailosaur 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 mailosaur-mcp with a green status indicator.
3

Start using tools

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

Terminal

claude mcp add --transport http mailosaur-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 Mailosaur 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": {
    "mailosaur-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 Mailosaur. 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 Mailosaur MCP in Claude Code

Run `claude mcp add --transport http mailosaur -- ` in your terminal. This registers the server and saves the configuration directly to your local `~/.claude.json` file.

Yes, Claude Code executes in headless environments and can call `search_server_messages` to verify emails during automated test runs. You can integrate this step into your GitHub Actions or Docker containers.

Ask Claude Code to search using criteria like the recipient's address or subject line. The tool `search_server_messages` will execute, returning the matching email metadata directly to your terminal.

Call `delete_specific_message` with the target message ID to remove it permanently. You can also wipe the entire inbox at once by executing `clear_server_inbox`.

All data is processed within an ephemeral V8 sandbox hosted by Vinkius. Your server IDs and email payloads are never written to persistent disk storage, ensuring complete isolation and compliance during MCP server execution.

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