How to Use the ElectricSQL (Sync Engine) MCP in Windsurf

Q: How do I configure the ElectricSQL (Sync Engine) MCP server in Windsurf?

Open your /.codeium/windsurf/mcpconfig.json file and add the server details under the mcpServers object. You can also use the Settings menu to navigate to the Cascade interface and click refresh.

Sync real-time Postgres shapes directly into Windsurf so Cascade can build reactive features without polling.

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Connect ElectricSQL (Sync Engine) MCP to Windsurf

Create your Vinkius account to connect ElectricSQL (Sync Engine) 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 ElectricSQL (Sync Engine) with Windsurf

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Fetch Initial Postgres States via MCP Server

Your agent uses the `get_shape` tool to pull live Postgres subsets straight into your workspace. When you tell Cascade to analyze user tables, it hits the ElectricSQL engine with an offset of -1 to grab the exact initial state. This means Windsurf stops guessing what your database looks like right now. Instead of writing mock data, the agent reads the actual synced shape and writes frontend code that matches your live backend schema perfectly.

Define Dynamic Data Subsets

The `post_shape` tool tells ElectricSQL exactly which rows and columns Cascade needs to track. If your multi-step prompt involves building a dashboard for active orders, the agent creates a targeted subset snapshot on the fly. You skip the manual setup of logical replication slots. Cascade handles the HTTP Sync API negotiation, locking in the required data boundaries before it starts generating your React components.

Chain Database Syncs Autonomously

Cascade triggers `get_shape` and `post_shape` back-to-back while executing complex application builds. It pulls the initial data, updates the local state, and immediately writes the corresponding UI logic without stopping to ask you for a database dump. That continuous execution loop keeps your momentum going. The MCP connection feeds fresh Postgres data directly into the agent's context window, letting it validate its own assumptions before finalizing the code.

Setup guide

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

mcp_config.json

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

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Common questions about ElectricSQL (Sync Engine) MCP in Windsurf

Open your `~/.codeium/windsurf/mcp_config.json` file and add the server details under the `mcpServers` object. You can also use the Settings menu to navigate to the Cascade interface and click refresh.

Direct queries give you a static snapshot. This sync engine integration lets Cascade read active shape streams, meaning the agent writes code against your actual real-time database behavior.

Yes. The agent knows to pass the offset=-1 parameter when it needs the base state of your Postgres table. It handles the initial data load before writing any dependent code.

That is exactly what the POST method handles. Cascade creates specific boundaries for the data it needs to see, keeping the context window clean while ignoring irrelevant database rows.

Windsurf only reads the specific subset snapshots you authorize through the sync engine. The server isolates your Postgres shapes locally, meaning your raw database streams stay within your network and never leak to external model providers.

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