Infrastructure as Code MCP Servers — Terraform, Pulumi, AWS, OpenTofu, Spacelift

At a glance: IaC vendors are building AI-native infrastructure workflows. Terraform MCP leads (1.3K stars, Registry + HCP workspace management). Pulumi offers AI-to-AI delegation via Neo. AWS bundles CloudFormation + CDK validation. Spacelift Intent provisions cloud resources from natural language without generating IaC code. Rating: 4/5. Terraform — Ecosystem Leader hashicorp/terraform-mcp-server (1,300 stars, Go, MPL-2.0). Registry lookups (providers, modules, policies) + HCP Terraform/Enterprise workspace management (listing, runs, variables). Deliberate choice: no terraform apply — it provides registry intelligence, not execution. Dual transport (stdio + StreamableHTTP). Tool filtering via --toolsets and --tools . Platform operations require HCP Terraform/Enterprise. CLI-only users get Registry lookups only. Pulumi — AI-to-AI Delegation Pulumi MCP (remote at mcp.ai.pulumi.com/mcp , local npm package). 15+ tools. Neo delegation is architecturally unique — neo-bridge delegates infras