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MailerLite MCP Integration for LangGraph

Connect MailerLite to LangGraph through the local KosmoKrator MCP gateway with scoped tools, credentials, and write policy.

8 functions 4 read 4 write API key auth
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Connect MailerLite to LangGraph

Run KosmoKrator integration calls from LangGraph nodes while preserving local credentials and permissions.

Use a graph node that calls the KosmoKrator CLI for deterministic steps or an MCP client for dynamic tool selection. The gateway is local, scoped to this integration, and starts with --write=deny so LangGraph can inspect read-capable tools without receiving write access by default.

MailerLite MCP Config for LangGraph

Headless CLI calls fit repeatable graph edges; MCP fits exploratory agent nodes.

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

Run the Gateway Manually

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

Why Use KosmoKrator Here

Scoped tools

Expose only MailerLite 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.

MailerLite Tools Visible to LangGraph

LangGraph sees stable MCP tool names generated from the MailerLite integration catalog.

MCP toolSource functionTypeDescription
integration__mailerlite__mailerlite_list_subscribers mailerlite.mailerlite_list_subscribers Read List subscribers from MailerLite. Supports pagination and filtering by status (active, unsubscribed, etc.).
integration__mailerlite__mailerlite_get_subscriber mailerlite.mailerlite_get_subscriber Read Get details for a single MailerLite subscriber by their ID.
integration__mailerlite__mailerlite_create_subscriber mailerlite.mailerlite_create_subscriber Write Add a new subscriber to MailerLite. Provide an email address and optionally a name and custom fields.
integration__mailerlite__mailerlite_update_subscriber mailerlite.mailerlite_update_subscriber Write Update an existing subscriber in MailerLite. Provide the subscriber ID and fields to update.
integration__mailerlite__mailerlite_delete_subscriber mailerlite.mailerlite_delete_subscriber Write Delete a subscriber from MailerLite by their ID. This action is permanent.
integration__mailerlite__mailerlite_list_groups mailerlite.mailerlite_list_groups Read List subscriber groups (segments) from MailerLite. Supports pagination.
integration__mailerlite__mailerlite_add_subscriber_to_group mailerlite.mailerlite_add_subscriber_to_group Write Add a subscriber to a MailerLite group by providing the group ID and subscriber email.
integration__mailerlite__mailerlite_get_current_user mailerlite.mailerlite_get_current_user Read Get the currently authenticated MailerLite account information. Useful for verifying API credentials.

Related MailerLite Pages

MailerLite CLIUse direct JSON commands instead of MCP discovery. MailerLite MCPFull gateway reference and MCP tool names. KosmoKrator for LangGraphClient-level gateway setup.