AWS Architecture Diagram

Generate visual architecture diagrams of AWS infrastructure using the AWS Diagram MCP server — automatically discover and render VPCs, subnets, Transit Gateways, load balancers, and network connections.

MCP Server

• Command: uvx awslabs.aws-diagram-mcp-server@latest (stdio transport)
• Requires: AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY, AWS_REGION (or AWS_PROFILE)
• Dependency: Requires graphviz installed on the system (apt install graphviz or brew install graphviz)

Key Capabilities

• Auto-discovery: Scan AWS account and render infrastructure as a diagram
• Network topology: VPCs, subnets, route tables, IGW, NAT GW, TGW connections
• Service mapping: EC2, ELB, RDS, Lambda placed in their VPC/subnet context
• Multiple formats: PNG, SVG, PDF output
• Filtered views: Scope diagram to specific VPCs, services, or tags

Workflow: Network Architecture Diagram

When a user asks "draw our AWS network" or "show me the architecture":

1. Generate diagram: Use diagram tool scoped to networking resources
2. Include: VPCs, subnets (public/private), IGW, NAT GW, TGW, VPN, peering connections
3. Label: CIDR blocks, subnet names, AZ placement
4. Connections: Show routing paths — TGW attachments, peering links, VPN tunnels
5. Output: PNG or SVG file for sharing in Slack or documentation
6. Report: Architecture summary alongside the diagram

Workflow: VPC Detail Diagram

When focusing on a specific VPC:

1. Scope to VPC: Filter diagram to one VPC by ID or tag
2. Show subnets: Public, private, isolated — grouped by AZ
3. Show route tables: Main and custom route tables with key routes
4. Show gateways: IGW, NAT GW, VPC endpoints
5. Show security: NACLs, security group relationships
6. Output: Detailed VPC topology diagram

Workflow: Multi-Account Network Diagram

When documenting cross-account architecture:

1. Hub-spoke topology: Show Transit Gateway as the hub
2. VPC attachments: Each spoke VPC with its CIDR and purpose
3. Route propagation: Show which routes propagate where
4. VPN/DX: On-premises connections via VPN or Direct Connect
5. Inspection VPC: Network Firewall placement if applicable
6. Output: Enterprise network topology diagram

Integration with Other Skills

Skill	How They Work Together
aws-network-ops	Discover VPCs/TGWs first, then diagram them
aws-cloud-monitoring	Add CloudWatch metrics annotations to diagram
aws-cost-ops	Annotate diagram with cost per resource
markmap-viz	Generate mindmap alternative for simpler overviews

Diagram Scoping Tips

Scope	When To Use
Full account	Initial architecture review or documentation
Single VPC	Troubleshooting or VPC-specific audit
TGW + attachments	Multi-VPC connectivity review
Subnet-level	Security audit or routing investigation
Tagged resources	Application-specific or team-specific views

Important Rules

• Graphviz required — the MCP server generates Graphviz DOT files and renders them; graphviz must be installed
• Large accounts may produce complex diagrams — scope with filters for clarity
• Region-specific — diagram shows resources in the configured AWS_REGION only
• Read-only — only discovers and renders, never modifies resources
• Record in GAIT — log diagram generation for audit trail

Environment Variables

• AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY, AWS_REGION (or AWS_PROFILE)