Mewcp Chef Server

A Model Context Protocol (MCP) server that exposes the Chef Infra Server API for generic, stateless, multi-tenant API operations.

Overview

This MCP is an integration server for Chef Infra Server and follows Curious Layer standards:

• Stateless and multi-tenant by design
• Per-request authentication (no shared in-memory auth/session state)
• Generic API coverage for all Chef Server endpoints via tool calls

Authentication

All tenant-facing tools require authentication input on every call.

Chef Signature Auth (default)

Use this auth payload format in auth_data:

{
  "auth_type": "chef-signature",
  "user_id": "pivotal",
  "private_key": "-----BEGIN RSA PRIVATE KEY-----\n...\n-----END RSA PRIVATE KEY-----",
  "auth_version": "1.3",
  "chef_version": "18.0.0",
  "server_api_version": "1"
}

Notes:

• private_key_base64 can be used instead of private_key.
• auth_version supports 1.3 (recommended) and 1.0.

Basic Auth (for endpoints like /_stats)

{
  "auth_type": "basic",
  "basic_username": "statsuser",
  "basic_password": "your-password"
}

Tools

This server exposes dedicated tools per endpoint functionality (instead of a generic wrapper).

• health_check

Global endpoint tools:

• chef_authenticate_user
• chef_get_license
• chef_list_organizations_global
• chef_create_organization_global
• chef_get_organization_global
• chef_update_organization_global
• chef_delete_organization_global
• chef_get_stats
• chef_get_status
• chef_list_users_global
• chef_create_user_global
• chef_get_user_global
• chef_update_user_global
• chef_delete_user_global
• chef_list_user_keys_global
• chef_create_user_key_global
• chef_get_user_key_global
• chef_update_user_key_global
• chef_delete_user_key_global
• chef_get_universe_global

Organization endpoint tools:

• chef_list_association_requests
• chef_create_association_request
• chef_delete_association_request
• chef_list_clients
• chef_create_client
• chef_get_client
• chef_update_client
• chef_delete_client
• chef_list_client_keys
• chef_create_client_key
• chef_get_client_key
• chef_update_client_key
• chef_delete_client_key
• chef_list_containers
• chef_create_container
• chef_get_container
• chef_delete_container
• chef_list_cookbook_artifacts
• chef_get_cookbook_artifact
• chef_get_cookbook_artifact_version
• chef_upsert_cookbook_artifact_version
• chef_delete_cookbook_artifact_version
• chef_list_cookbooks
• chef_get_latest_cookbooks
• chef_get_latest_recipes
• chef_get_cookbook
• chef_get_cookbook_version
• chef_upsert_cookbook_version
• chef_delete_cookbook_version
• chef_list_data_bags
• chef_create_data_bag
• chef_get_data_bag
• chef_create_data_bag_item
• chef_delete_data_bag
• chef_get_data_bag_item
• chef_update_data_bag_item
• chef_delete_data_bag_item
• chef_list_environments
• chef_create_environment
• chef_get_default_environment
• chef_get_environment
• chef_update_environment
• chef_delete_environment
• chef_get_environment_cookbook
• chef_resolve_environment_cookbook_versions
• chef_list_environment_cookbooks
• chef_list_environment_nodes
• chef_list_environment_recipes
• chef_get_environment_role_run_list
• chef_list_groups
• chef_create_group
• chef_get_group
• chef_update_group
• chef_delete_group
• chef_list_nodes
• chef_create_node
• chef_get_node
• chef_update_node
• chef_delete_node
• chef_head_node
• chef_list_policies
• chef_list_policy_groups
• chef_get_principal
• chef_get_required_recipe
• chef_list_roles
• chef_create_role
• chef_get_role
• chef_update_role
• chef_delete_role
• chef_list_role_environments
• chef_get_role_environment
• chef_create_sandbox
• chef_commit_sandbox
• chef_list_search_indexes
• chef_search_index
• chef_partial_search_index
• chef_get_updated_since
• chef_list_org_users
• chef_associate_org_user
• chef_get_org_user
• chef_disassociate_org_user

Setup

pip install -r requirements.txt

Running the Server

# stdio
python server.py

# sse
python server.py --transport sse --host 127.0.0.1 --port 8001

# streamable-http
python server.py --transport streamable-http --host 127.0.0.1 --port 8001

Example Tool Calls

Global endpoint request

{
  "tool": "chef_list_organizations_global",
  "arguments": {
    "auth_data": "{\"auth_type\":\"chef-signature\",\"user_id\":\"pivotal\",\"private_key\":\"-----BEGIN RSA PRIVATE KEY-----\\n...\\n-----END RSA PRIVATE KEY-----\"}",
    "server_url": "https://chef.example.com",
    "path_params": "{}",
    "query_params": "{}"
  }
}

Organization-scoped request

{
  "tool": "chef_list_nodes",
  "arguments": {
    "auth_data": "{\"auth_type\":\"chef-signature\",\"user_id\":\"my-client\",\"private_key\":\"-----BEGIN RSA PRIVATE KEY-----\\n...\\n-----END RSA PRIVATE KEY-----\"}",
    "server_url": "https://chef.example.com",
    "path_params": "{\"organization\":\"my-org\"}",
    "query_params": "{}"
  }
}

Basic auth endpoint request

{
  "tool": "chef_get_stats",
  "arguments": {
    "auth_data": "{\"auth_type\":\"basic\",\"basic_username\":\"statsuser\",\"basic_password\":\"secret\"}",
    "server_url": "https://chef.example.com",
    "path_params": "{}",
    "query_params": "{\"format\":\"json\"}"
  }
}

Project Structure

cl-mcp-chef-server/
|-- server.py
|-- requirements.txt
|-- README.md
`-- chef_server_mcp/
    |-- __init__.py
    |-- cli.py
    |-- config.py
    |-- tools.py
    |-- schemas.py
    `-- service.py

Resources

• Chef Infra Server API docs: https://docs.chef.io/server/api_chef_server/
• FastMCP docs: https://gofastmcp.com/v2/getting-started/welcome