KosmoKrator

communication

Missive MCP Integration for LangGraph

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

6 functions 4 read 2 write Bearer token auth
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Connect Missive 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.

Missive MCP Config for LangGraph

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

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

Run the Gateway Manually

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

Why Use KosmoKrator Here

Scoped tools

Expose only Missive 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.

Missive Tools Visible to LangGraph

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

MCP toolSource functionTypeDescription
integration__missive__missive_list_conversations missive.missive_list_conversations Read List conversations from Missive. Supports filtering by inbox, assignee, and state. Returns paginated results.
integration__missive__missive_get_conversation missive.missive_get_conversation Read Get a single Missive conversation by ID, including messages and metadata.
integration__missive__missive_create_comment missive.missive_create_comment Write Create a comment on a Missive conversation. Use this to add internal notes or replies.
integration__missive__missive_list_tasks missive.missive_list_tasks Read List tasks from Missive. Supports filtering by state and assignee. Returns paginated results.
integration__missive__missive_create_task missive.missive_create_task Write Create a new task in Missive. Requires a title. Optionally set description, assignee, and due date.
integration__missive__missive_get_current_user missive.missive_get_current_user Read Get the profile of the currently authenticated Missive user, including name, email, and organization info.

Related Missive Pages

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