KosmoKrator

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Hetzner Cloud MCP Integration for LangGraph

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

7 functions 6 read 1 write Bearer token auth
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Connect Hetzner Cloud 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.

Hetzner Cloud MCP Config for LangGraph

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

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

Run the Gateway Manually

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

Why Use KosmoKrator Here

Scoped tools

Expose only Hetzner Cloud 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.

Hetzner Cloud Tools Visible to LangGraph

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

MCP toolSource functionTypeDescription
integration__hetzner__hetzner_list_servers hetzner.hetzner_list_servers Read List Hetzner Cloud servers. Supports pagination with per_page and page parameters.
integration__hetzner__hetzner_get_server hetzner.hetzner_get_server Read Get details for a specific Hetzner Cloud server by ID.
integration__hetzner__hetzner_create_server hetzner.hetzner_create_server Write Create a new Hetzner Cloud server with specified name, type, and image.
integration__hetzner__hetzner_list_volumes hetzner.hetzner_list_volumes Read List Hetzner Cloud volumes. Supports pagination with per_page and page parameters.
integration__hetzner__hetzner_list_networks hetzner.hetzner_list_networks Read List Hetzner Cloud networks. Supports pagination with per_page and page parameters.
integration__hetzner__hetzner_list_ssh_keys hetzner.hetzner_list_ssh_keys Read List Hetzner Cloud SSH keys. Supports pagination with per_page and page parameters.
integration__hetzner__hetzner_get_current_user hetzner.hetzner_get_current_user Read Get the profile of the currently authenticated Hetzner Cloud user. Useful for verifying credentials and displaying account information.

Related Hetzner Cloud Pages

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