MCP Comparison
AWS CLI vs Terraform
Updated: April 16, 2026
Verdict
Terraform MCP operates on Terraform state; plan, apply, inspect drift. AWS MCP makes live calls against AWS APIs directly. Use Terraform MCP when your infrastructure is codified as Terraform; use AWS MCP for read-only investigation or one-off ops outside the Terraform loop.
Pick AWS CLI if...
- +You need to read live AWS state outside Terraform
- +Ad-hoc operations without a Terraform commit are fine
- +You do not codify infra in Terraform at all
- +You want direct API access to AWS services
- +You are investigating incidents, not rolling out changes
Pick Terraform if...
- +All your infra is managed as Terraform code
- +You want the agent to plan and review changes, not mutate live resources
- +You use Terraform Cloud or Enterprise for state
- +Multi-cloud is in scope (Terraform spans many providers)
- +Drift detection matters more than direct cloud calls
Feature comparison
| Feature | AWS CLI | Terraform |
|---|---|---|
| Primary focus | call AWS services like EC2, Lambda, and S3 | plan, apply, and inspect Terraform state |
| Vendor / maintainer | AWS Labs | HashiCorp |
| Implementation language | Python | Go |
| License | Apache 2.0 | MPL 2.0 |
| Pricing | free server, AWS usage billed separately | free server, Terraform Cloud billed separately |
| Authentication | IAM credentials or SSO | Terraform Cloud token |
| Transport | stdio | stdio |
| Official homepage | github.com/awslabs/mcp | github.com/hashicorp/terraform-mcp-server |
Frequently asked questions
Which MCP server is faster to set up, AWS MCP or Terraform MCP?
AWS MCP typically installs via a single npm or pip command and asks for IAM credentials or SSO. Terraform MCP needs Terraform Cloud token. Expect 2-5 minutes for either once credentials are ready. If you already have IAM configured, AWS MCP wins by a minute or two.
Can I run AWS MCP and Terraform MCP side by side in the same Claude client?
Yes. Claude Desktop, Cursor, and Claude Code all accept multiple MCP servers in the same config file. Each runs in its own process and exposes a distinct tool namespace, so there are no naming collisions. Memory usage is additive; budget roughly 40-80 MB per server.
How do AWS MCP and Terraform MCP compare on cost?
AWS MCP is free server, AWS usage billed separately. Terraform MCP is free server, Terraform Cloud billed separately. Most of the real spend is on the underlying service, not the MCP server itself; the server is almost always free. Budget based on query volume at the backend, not the MCP layer.
Is AWS MCP or Terraform MCP more production-ready?
AWS MCP is maintained by AWS Labs, which tends to mean faster fixes. Terraform MCP is backed by HashiCorp. For critical workloads, pick the vendor-backed option or pin a specific version.
What authentication does each server need?
AWS MCP authenticates with IAM credentials or SSO. Terraform MCP uses Terraform Cloud token. Store secrets in a password manager or your shell's keychain and inject them via environment variables; never commit them to the MCP config file, which is often synced across machines.
Which one should I pick first if I am just starting with MCP?
Start with whichever backend you already pay for or use daily. If you do not use either yet, both require a paid account; pick based on the service you plan to use most. You can always add the second one later without disrupting the first.