KosmoKrator

communication

WhatsApp Business MCP Integration for LangChain

Connect WhatsApp Business to LangChain through the local KosmoKrator MCP gateway with scoped tools, credentials, and write policy.

6 functions 4 read 2 write Bearer token auth
Submit WhatsApp Business feedback View package source

Connect WhatsApp Business to LangChain

Bridge LangChain agents to local KosmoKrator integration tools through MCP or headless CLI calls.

Use the MCP gateway when the agent should discover tools, or wrap kosmo integrations:call for fixed chains. The gateway is local, scoped to this integration, and starts with --write=deny so LangChain can inspect read-capable tools without receiving write access by default.

WhatsApp Business MCP Config for LangChain

Keep the gateway scoped to the integration and operation class needed by the chain.

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

Run the Gateway Manually

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

Why Use KosmoKrator Here

Scoped tools

Expose only WhatsApp Business 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.

WhatsApp Business Tools Visible to LangChain

LangChain sees stable MCP tool names generated from the WhatsApp Business integration catalog.

MCP toolSource functionTypeDescription
integration__whatsapp__whatsapp_send_message whatsapp.whatsapp_send_message Write Send a text message to a WhatsApp recipient. Use this for replying within an existing 24-hour customer service window. For new conversations, use the send_template tool instead.
integration__whatsapp__whatsapp_get_message whatsapp.whatsapp_get_message Read Retrieve a specific WhatsApp message by its ID. Returns the message content, status (sent, delivered, read), and timestamps.
integration__whatsapp__whatsapp_list_templates whatsapp.whatsapp_list_templates Read List approved WhatsApp message templates. Templates are required to initiate new conversations outside the 24-hour service window.
integration__whatsapp__whatsapp_list_contacts whatsapp.whatsapp_list_contacts Read List WhatsApp contacts for the business phone number. Returns WhatsApp IDs and profile names.
integration__whatsapp__whatsapp_send_template whatsapp.whatsapp_send_template Write Send a template-based WhatsApp message. Use this to initiate new conversations outside the 24-hour window. The template must be pre-approved in the WhatsApp Business Manager.
integration__whatsapp__whatsapp_get_current_user whatsapp.whatsapp_get_current_user Read Get the authenticated WhatsApp Business user info — name, email, and business ID. Useful for verifying which account is connected.

Related WhatsApp Business Pages

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