KosmoKrator

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Docker Hub MCP Integration for LangGraph

Connect Docker Hub 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 Docker Hub 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.

Docker Hub MCP Config for LangGraph

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

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

Run the Gateway Manually

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

Why Use KosmoKrator Here

Scoped tools

Expose only Docker Hub 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.

Docker Hub Tools Visible to LangGraph

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

MCP toolSource functionTypeDescription
integration__docker__docker_list_repositories docker.docker_list_repositories Read List Docker Hub repositories. Optionally filter by namespace. Supports pagination with page_size and page parameters.
integration__docker__docker_get_repository docker.docker_get_repository Read Get details for a specific Docker Hub repository by namespace and name.
integration__docker__docker_list_tags docker.docker_list_tags Read List tags for a Docker Hub repository. Supports pagination with page_size and page parameters.
integration__docker__docker_get_tag docker.docker_get_tag Read Get details for a specific tag in a Docker Hub repository.
integration__docker__docker_create_repository docker.docker_create_repository Write Create a new Docker Hub repository under a namespace.
integration__docker__docker_list_organizations docker.docker_list_organizations Read List Docker Hub organizations the authenticated user belongs to. Supports pagination with page_size and page parameters.
integration__docker__docker_get_current_user docker.docker_get_current_user Read Get the profile of the currently authenticated Docker Hub user. Useful for verifying credentials and displaying account information.

Related Docker Hub Pages

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