How to Use the Mailjet MCP in Windsurf

Q: How does Windsurf use Mailjet to send transactional emails?

Windsurf's Cascade agent uses the sendtransactionalemail tool. You provide a high-level goal, and it constructs the required JSON payload for the Mailjet v3.1 Send API, sending things like password resets or order confirmations without you writing the API call.

Let Windsurf's Cascade agent run your entire Mailjet email workflow. Set a goal, like 'onboard new user', and it just works.

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Connect Mailjet MCP to Windsurf

Create your Vinkius account to connect Mailjet 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 Mailjet with Windsurf

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Automate New User Onboarding

Tell Windsurf to onboard a new user. Its Cascade agent sees the goal, then chains the tools. It will hit `create_new_contact` with the user's email, then immediately use `add_contact_to_list` to drop them into your "Welcome Series" list. Cascade doesn't stop there. It can then fire a welcome message using `send_transactional_email`. You don't prompt each step; you just see the completed action in your Windsurf panel. This is what an MCP integration should do.

Sync Marketing Lists with Windsurf

Your agent can keep local data in sync with Mailjet. Ask Windsurf to "get all my marketing subscribers." It runs `list_subscriber_lists` to find the right list ID, then `list_all_contacts` to pull every subscriber from it. This isn't just a data dump. Because Windsurf understands context, it can format this data into a CSV or update a local database. It's a full sync, not just a query.

Report on Campaign Performance

Stop logging into the Mailjet dashboard for numbers. Just ask Windsurf, "How did last week's campaign do?" It will use `list_marketing_campaigns` to find the right one, then `get_campaign_performance` to get the stats. The real power is when Cascade uses this data. You can set a goal like "Report on underperforming campaigns." Windsurf will fetch the data, identify campaigns below a certain open rate, and draft an email to your team about it. This MCP server gives it the tools to do that.

Setup guide

Set up Mailjet 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 Mailjet 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 Mailjet payment history." If connected, Cascade will call the Mailjet tools directly. You will see a green dot next to the server name in the MCP panel.

mcp_config.json

{
  "mcpServers": {
    "mailjet-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 Mailjet. 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 Mailjet MCP in Windsurf

Windsurf's Cascade agent uses the `send_transactional_email` tool. You provide a high-level goal, and it constructs the required JSON payload for the Mailjet v3.1 Send API, sending things like password resets or order confirmations without you writing the API call.

Yes. You can tell Windsurf to add someone to a list, and it will use the `create_new_contact` and `add_contact_to_list` tools in sequence. It finds the list ID and contact ID automatically.

Just ask Windsurf a direct question, like "Get me the performance for the 'Q3 Promo' campaign." It uses `list_marketing_campaigns` to find the campaign ID and then `get_campaign_performance` to pull the open and click rates for you.

It is. Instead of just exposing API endpoints, this Mailjet MCP server gives your agent discrete tools. That lets Windsurf's Cascade feature plan and execute multi-step jobs, like pulling campaign stats with `get_campaign_details` and then sending a summary.

The server only handles the data needed for the tools to work. This includes contact email addresses and names for `create_new_contact`, and list or campaign IDs. All authentication is managed by Vinkius, and the server itself is ephemeral, meaning your data isn't stored after the operation completes.

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