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Customer.io MCP Integration for Claude Code

Connect Customer.io to Claude Code through the local KosmoKrator MCP gateway with scoped tools, credentials, and write policy.

7 functions 5 read 2 write API key auth
Submit Customer.io feedback View package source

Connect Customer.io to Claude Code

Connect local KosmoKrator integrations to Claude Code through one scoped MCP gateway entry.

Add KosmoKrator as a stdio MCP server in the Claude Code project config and select the integrations that should be visible. The gateway is local, scoped to this integration, and starts with --write=deny so Claude Code can inspect read-capable tools without receiving write access by default.

Customer.io MCP Config for Claude Code

Claude Code can launch the local kosmo binary directly from the project MCP config.

{
  "mcpServers": {
    "kosmokrator-customerio": {
      "type": "stdio",
      "command": "kosmo",
      "args": [
        "mcp:serve",
        "--integration=customerio",
        "--write=deny"
      ]
    }
  }
}

Run the Gateway Manually

kosmokrator mcp:serve --integration=customerio --write=deny

Why Use KosmoKrator Here

Scoped tools

Expose only Customer.io instead of a broad multi-service tool list.

Local credentials

Reuse credentials already configured for the KosmoKrator CLI and Lua runtime.

Write policy

Start read-only, then opt into ask or allow for trusted workspaces.

Customer.io Tools Visible to Claude Code

Claude Code sees stable MCP tool names generated from the Customer.io integration catalog.

MCP toolSource functionTypeDescription
integration__customerio__customerio_identify_customer customerio.customerio_identify_customer Write Create or update a customer profile in Customer.io. Use this to add new customers or update existing customer attributes like email, name, and custom properties.
integration__customerio__customerio_track_event customerio.customerio_track_event Write Track a custom event for a customer in Customer.io. Events trigger campaign workflows and can be used to segment customers.
integration__customerio__customerio_list_segments customerio.customerio_list_segments Read List all segments in the Customer.io workspace. Segments are dynamic groups of customers defined by conditions.
integration__customerio__customerio_list_campaigns customerio.customerio_list_campaigns Read List all campaigns in the Customer.io workspace. Campaigns are automated message sequences triggered by events or segments.
integration__customerio__customerio_get_campaign customerio.customerio_get_campaign Read Get detailed information about a specific campaign in Customer.io, including its triggers, actions, and performance metrics.
integration__customerio__customerio_list_newsletters customerio.customerio_list_newsletters Read List all newsletters in the Customer.io workspace. Newsletters are one-time broadcast messages sent to segments.
integration__customerio__customerio_get_current_user customerio.customerio_get_current_user Read Get the currently authenticated user and account information from Customer.io. Useful for verifying API credentials and checking workspace details.

Related Customer.io Pages

Customer.io CLIUse direct JSON commands instead of MCP discovery. Customer.io MCPFull gateway reference and MCP tool names. KosmoKrator for Claude CodeClient-level gateway setup.