How to Use the Mailosaur MCP in Windsurf

Q: Can Windsurf use Mailosaur to test SMS messages?

Yes, Cascade uses searchservermessages to find both SMS and email messages sent to your virtual numbers. It extracts the raw text body from the SMS payload automatically.

Q: How does Windsurf handle parallel test runs with Mailosaur?

Cascade calls createvirtualserver to generate unique inboxes for each parallel test thread. This prevents different test runs from reading or clearing each other's messages.

Q: How do I clean up old messages?

Use deletespecificmessage to remove individual emails after verification. For a complete reset, run clearserverinbox to purge everything inside that specific virtual server.

Let Cascade autonomously verify signup emails and OTP codes in real-time using Windsurf via this MCP server.

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Connect Mailosaur MCP to Windsurf

Create your Vinkius account to connect Mailosaur to Windsurf 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 Windsurf

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Cascade chains Mailosaur tests autonomously

The `search_server_messages` tool lets Windsurf find verification emails without manual prompting. You tell Cascade to register a user, and it automatically triggers the signup flow, waits for the email, and queries the virtual server for the matching message. Once found, Cascade grabs the message ID and uses `get_message_content` to extract the verification link. It does this in one continuous execution loop, running your tests from start to finish without pausing to ask you for the next step.

Dynamic test inbox creation in Windsurf

The `create_virtual_server` tool lets your Windsurf agent spin up isolated testing inboxes on the fly. Instead of sharing a single dirty inbox across parallel test runs, Cascade creates a dedicated server for each specific branch or test suite. After the tests run, Cascade uses `clear_server_inbox` to wipe the slate clean. This keeps your testing environments completely isolated and prevents stale OTP codes or old emails from causing false failures in your Windsurf workspace.

Inspect Mailosaur server states via MCP Server

The `list_virtual_servers` tool gives Cascade immediate visibility into your active Mailosaur testing environments. Cascade checks the available servers, identifies the correct target ID, and verifies its status before running any email validation steps. It combines this with `get_server_details` to verify that the target server is active and ready to receive incoming SMTP or SMS traffic. If a server is missing, Cascade simply creates it, keeping your local debugging sessions moving without manual intervention.

Setup guide

Set up Mailosaur MCP in Windsurf

Prerequisites

Windsurf IDE installed (macOS, Windows, or Linux)
Active Vinkius subscription with a valid endpoint token

1

Open MCP configuration

Click the Cascade assistant icon in the sidebar, then click the hammer icon (🔨) at the top of the panel. Select "Configure" to open ~/.codeium/windsurf/mcp_config.json.
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

Refresh MCPs

Go back to the hammer icon (🔨) in Cascade and click "Refresh". Windsurf will detect the new server. No full restart is needed — the connection is hot-reloaded.
4

Verify in Cascade

Start a new Cascade conversation and ask something like "Show my Mailosaur payment history." If connected, Cascade will call the Mailosaur tools directly. You will see a green dot next to the server name in the MCP panel.

mcp_config.json

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

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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 Windsurf

Open your Settings, go to Cascade, and find the MCP Servers UI to add the server. Alternatively, paste the Vinkius endpoint configuration directly into your `~/.codeium/windsurf/mcp_config.json` file.

Yes, Cascade uses `search_server_messages` to find both SMS and email messages sent to your virtual numbers. It extracts the raw text body from the SMS payload automatically.

Cascade calls `create_virtual_server` to generate unique inboxes for each parallel test thread. This prevents different test runs from reading or clearing each other's messages.

Use `delete_specific_message` to remove individual emails after verification. For a complete reset, run `clear_server_inbox` to purge everything inside that specific virtual server.

Yes, Vinkius runs the server in an ephemeral V8 sandbox that never persists your email payloads or SMS messages. Your API keys are transmitted securely via a single token and are never exposed to the LLM or stored on disk.

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