Terraform Registry MCP Server

A Model Context Protocol (MCP) server that provides comprehensive access to the Terraform public registry. This server enables AI assistants to search and retrieve information about Terraform providers, modules, and documentation.

Features

Module Tools

• 🔍 search_modules - Search for Terraform modules by name or keywords
• 📦 get_module_details - Get detailed information about a specific module
• 🏷️ get_latest_module_version - Get the latest version of a module
• 📋 list_module_versions - List all available versions of a module

Provider Tools

• 🔍 search_providers - Search for Terraform providers
• 📦 get_provider_details - Get detailed information about a provider
• 🏷️ get_latest_provider_version - Get the latest version of a provider
• 📋 list_provider_versions - List all available versions of a provider
• 📚 get_provider_docs - Fetch full provider documentation (setup, auth, version notes)
• 📄 get_provider_resource_docs - Fetch complete resource docs (args, attributes, examples)
• 📄 get_provider_data_source_docs - Fetch complete data source docs
• 🔎 search_provider_docs - Search within provider documentation for specific errors, topics, or troubleshooting

New! Documentation tools now fetch the actual markdown content from the registry, including version-specific information, breaking changes, upgrade guides, and complete argument/attribute references.

Installation

Using Docker (Recommended)

Build and run with Docker Compose:

docker-compose up -d

Or build manually:

docker build -t terraform-registry-mcp-server .
docker run -d -p 3002:3002 --name terraform-registry-mcp-server \
  -e TRANSPORT_MODE=http \
  -e PORT=3002 \
  terraform-registry-mcp-server

Local Development

Install dependencies:

pip install -e .

Run in stdio mode (for local MCP clients):

terraform-mcp-server

Run in HTTP mode:

export TRANSPORT_MODE=http
export PORT=3002
terraform-mcp-server

Configuration

Environment Variables

• TRANSPORT_MODE - Transport mode: stdio (default) or http
• PORT - HTTP server port (default: 3002)

VS Code MCP Configuration

Add to your VS Code mcp.json:

{
  "mcpServers": {
    "terraform": {
      "command": "docker",
      "args": [
        "run",
        "-i",
        "--rm",
        "terraform-mcp-server"
      ]
    }
  }
}

Or for HTTP transport:

{
  "mcpServers": {
    "terraform": {
      "url": "http://localhost:3002/mcp"
    }
  }
}

Usage Examples

Search for AWS VPC modules

search_modules(query="vpc", provider="aws", limit=10)

Get module details

get_module_details(
    namespace="terraform-aws-modules",
    name="vpc",
    provider="aws"
)

Search for providers

search_providers(query="azure", tier="official")

Get latest provider version

get_latest_provider_version(namespace="hashicorp", name="aws")

Get provider documentation

# Get full provider overview with version info and breaking changes
get_provider_docs(namespace="hashicorp", name="azurerm")

# Get specific version documentation (useful for compatibility checks)
get_provider_docs(namespace="hashicorp", name="azurerm", version="3.0.0")

Get specific resource documentation

# Fetches complete documentation including all arguments and attributes
get_provider_resource_docs(
    namespace="hashicorp",
    name="aws",
    resource_name="aws_instance"
)

# Check a specific version's resource documentation
get_provider_resource_docs(
    namespace="hashicorp",
    name="azurerm",
    resource_name="azurerm_virtual_machine",
    version="3.85.0"
)

Get data source documentation

get_provider_data_source_docs(
    namespace="hashicorp",
    name="aws",
    data_source_name="aws_ami"
)

Deployment to Azure Container Apps

This server is designed for easy deployment to Azure Container Apps:

1. Build and push to Azure Container Registry:

az acr build --registry <your-acr> --image terraform-mcp-server:latest .

2. Deploy to Container Apps:

az containerapp create \
  --name terraform-mcp-server \
  --resource-group <your-rg> \
  --environment <your-env> \
  --image <your-acr>.azurecr.io/terraform-mcp-server:latest \
  --target-port 3002 \
  --ingress external \
  --env-vars TRANSPORT_MODE=http PORT=3002

Architecture

• FastMCP - Uses the official MCP Python SDK with FastMCP for simplified server creation
• StreamableHTTP Transport - Supports modern HTTP transport for cloud deployment
• Public Registry Only - Focuses on public Terraform registry (no authentication required)
• Lightweight - Minimal dependencies, fast startup

Comparison with HashiCorp's Server

This is a simplified version compared to HashiCorp's official terraform-mcp-server:

Included:

• ✅ Public registry search (modules & providers)
• ✅ Module and provider details
• ✅ Version management
• ✅ HTTP transport for cloud deployment
• ✅ Docker support

Not Included:

• ❌ HCP Terraform / Terraform Enterprise integration
• ❌ Workspace management
• ❌ Run execution
• ❌ Variable management
• ❌ Private registry access

License

MIT License

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.