How to Use the ElectricSQL (Sync Engine) MCP in Claude Code

Q: How do I add the ElectricSQL (Sync Engine) to Claude Code?

Run claude mcp add --transport http electric-sync -- in your terminal. Make sure all flags appear before the server name, and check your configuration to confirm the connection.

Pipe real-time Postgres syncs directly into Claude Code for headless CI/CD database operations.

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Connect ElectricSQL (Sync Engine) MCP to Claude Code

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

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Headless Postgres Syncs via MCP Server

Claude Code triggers the `get_shape` tool from your terminal to pull live Postgres data into your automated pipelines. Passing an offset of -1 initiates the base sync, letting your shell scripts verify database states before deploying backend changes. You drop the brittle polling scripts. The CLI connects straight to the HTTP Sync API, reading the exact data shapes required to validate migrations or populate staging environments without opening a browser.

Snapshot Database Subsets in CI

Executing the `post_shape` tool lets your terminal agent define precise boundaries for Postgres subsets. When a GitHub Action needs to test a specific tenant's data, it creates a targeted snapshot on demand. This keeps your automated tests incredibly fast. The agent isolates just the necessary rows, processes the data, and pipes the output to your reporting tools without bogging down the main database cluster.

Automate Real-Time Data Workflows

Combining `get_shape` and `post_shape` gives you a fully scriptable sync engine right in your terminal. Claude Code can monitor data shapes, detect schema anomalies, and trigger alert webhooks entirely autonomously. SREs get a programmable interface to real-time Postgres activity. The MCP protocol handles the connection mechanics, freeing you to write simple shell commands that interact with complex logical replication streams.

Setup guide

Set up ElectricSQL (Sync Engine) 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 electricsql-sync-engine-mcp with a green status indicator.
3

Start using tools

Ask Claude Code something like "Check my latest ElectricSQL (Sync Engine) transactions." It will automatically discover and invoke the available ElectricSQL (Sync Engine) tools.

Terminal

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

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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 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

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

Get your connection token →

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Common questions about ElectricSQL (Sync Engine) MCP in Claude Code

Run `claude mcp add --transport http electric-sync -- ` in your terminal. Make sure all flags appear before the server name, and check your configuration to confirm the connection.

It allows your deployment scripts to verify live database states instantly. The terminal agent can read active shapes to ensure migrations applied correctly before routing traffic.

Yes. You can script the agent to request specific data boundaries during CI runs. It handles the POST requests headless, keeping your test environments perfectly synced.

It works flawlessly in any headless environment. You just pass the correct HTTP transport URL to the CLI, and it handles the sync engine communication from inside the container.

The CLI executes all HTTP Sync API requests locally within your infrastructure. Your specific subset snapshots and database rows are processed in memory and never transmitted to external logging services.

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