README.md8.9 KB

Example: MCP Server Integrations

Connect Atmos to external MCP servers from the AWS ecosystem. Their tools become available in atmos ai chat, atmos ai ask, and atmos ai exec — no custom integration code needed.

Learn more in the MCP Configuration documentation.

MCP Servers Included

Server	Description	Credentials
aws-docs	Search and fetch AWS documentation	No
aws-knowledge	Managed AWS knowledge base (remote)	No
aws-billing	Billing summaries and payment history	Yes
aws-pricing	Real-time pricing and cost analysis	Yes
aws-security	Well-Architected security posture	Yes
aws-iam	IAM role/policy analysis	Yes
aws-cloudtrail	Event history and API auditing	Yes
aws-api	Direct AWS CLI access (read-only)	Yes

Prerequisites

Python 3.10+ — uvx is auto-installed by the Atmos Toolchain.
Atmos Auth — servers that need credentials use identity: "readonly". Update the auth section in atmos.yaml with your SSO start URL, permission set, and account ID, then run:
```
atmos auth login
```
See the Atmos Auth documentation for setup details.
AI provider — configure at least one AI provider.

Try It

cd examples/mcp

# List configured servers
atmos mcp list

# Test a server (no credentials needed)
atmos mcp test aws-docs

# List tools from a server
atmos mcp tools aws-docs

# Ask a question (AI auto-routes to the right server)
atmos ai ask "How do I configure S3 bucket lifecycle rules?"

# Billing query (requires Atmos Auth)
atmos ai ask "What did we spend on EC2 last month?"

# Security audit
atmos ai ask "Is GuardDuty enabled in all regions?"

# Manual server selection (skip auto-routing)
atmos ai ask --mcp aws-iam "List all IAM roles with admin access"

Smart Server Routing

When multiple servers are configured, Atmos automatically selects only the relevant ones:

$ atmos ai ask "List all IAM roles with admin access"
ℹ MCP routing selected 1 of 8 servers: aws-iam
ℹ MCP server "aws-iam" started (29 tools)

Use --mcp to override routing and specify servers directly. See the MCP documentation for details.

IDE Integration

Generate .mcp.json for Claude Code, Cursor, or any MCP-compatible IDE:

atmos mcp export
atmos mcp export --output .cursor/mcp.json

Servers with identity are wrapped with atmos auth exec for automatic credential injection.

See It in Action

Outputs below are from an AWS account. Identifiers have been redacted.

Documentation Search

$ atmos ai ask "How do I configure S3 bucket lifecycle rules?"

ℹ MCP routing selected 1 of 8 servers: aws-knowledge
ℹ AI tools initialized: 16
👽 Thinking...

   Configuring S3 Bucket Lifecycle Rules

   S3 lifecycle rules automate object management by transitioning objects between
   storage classes, archiving, or expiring them.

   Component │ Description
  ───────────┼────────────────────────────────────────────────────────
   Metadata  │ Rule ID and Status (Enabled/Disabled)
   Filter    │ Which objects the rule applies to (prefix, tags, size)
   Actions   │ What to do (transition, expire, delete)

  │  A bucket can have up to 1,000 rules per lifecycle configuration.

  ---
  ## Tool Executions (1)
  1. ✅ aws-knowledge → aws.search_documentation (2874ms)

Billing Summary

$ atmos ai ask "Show our billing summary for the past 2 months"

ℹ MCP routing selected 1 of 8 servers: aws-billing
ℹ AI tools initialized: 35
👽 Thinking...

  ## 📊 AWS Billing Summary — February & March 2026

  ### 💰 Monthly Totals

   Service                                  │ Feb 2026 │ Mar 2026 │ Change
  ──────────────────────────────────────────┼──────────┼───────────┼──────────
   Amazon Virtual Private Cloud             │ $309.53  │ $261.17   │ ▼ $48.36
   Amazon Elastic Container Registry Public │ $103.63  │ $103.66   │ ▲ $0.03
   EC2 - Other                              │ $88.12   │ $123.39   │ ▲ $35.27
   AWS Key Management Service               │ $50.94   │ $47.98    │ ▼ $2.96
   Amazon Redshift                          │ $50.87   │ $0.30     │ ▼ $50.57
   ...                                      │          │           │

  ### 📈 Grand Totals

   Month      │ Total Cost
  ────────────┼──────────────────
   Feb 2026   │ ~$782.16
   Mar 2026   │ ~$745.26
   Difference │ ▼ $36.90 (-4.7%)

  ---
  ## Tool Executions (1)
  1. ✅ aws-billing → cost-explorer (381ms)

Security Audit

$ atmos ai ask "Is GuardDuty enabled in all regions?"

ℹ MCP routing selected 2 of 8 servers: aws-api, aws-security
ℹ AI tools initialized: 18
👽 Thinking...

  ## ❌ GuardDuty is NOT Enabled in All Regions

   GuardDuty is only enabled in 1 out of 34 regions checked.

  ### ✅ Enabled (1 region)

   Region    │ Detector ID
  ───────────┼────────────────────────────────────
   us-east-2 │  <detector-id-redacted>

  ### ❌ Not Enabled (33 regions)

   ap-south-1, ap-southeast-1, eu-central-1, eu-west-1, us-east-1,
   us-west-2, ... (28 more)

  ### 🔒 Recommendations
    1. Enable GuardDuty in all active regions
    2. Use delegated administrator via AWS Organizations
    3. Consider AWS Security Hub to aggregate findings
    4. Prioritize us-east-1, us-west-2, eu-west-1

  ---
  ## Tool Executions (4)
  1. ✅ aws-api → call_aws (400ms)
  2. ✅ aws-api → call_aws (14ms)
  3. ✅ aws-api → call_aws (7ms)
  4. ✅ aws-api → call_aws (9450ms)

IAM Audit

$ atmos ai ask "List all IAM roles with admin access"

ℹ MCP routing selected 1 of 8 servers: aws-iam
ℹ AI tools initialized: 39
👽 Thinking...

  ## 🔐 IAM Roles with Admin Access

  ### Direct AdministratorAccess Policy (4 attachments)

   Role Name                                        │ Trust Principal
  ──────────────────────────────────────────────────┼───────────────────────────
    AWSReservedSSO_AdministratorAccess_...          │ AWS SSO (SAML Federation)
    AWSReservedSSO_RootAccess_...                   │ AWS SSO (SAML Federation)
    AWSReservedSSO_TerraformApplyAccess_...         │ AWS SSO (SAML Federation)
    AWSReservedSSO_TerraformApplyAccess-Core_...    │ AWS SSO (SAML Federation)

  ### 📋 Summary

   Category                                  │ Count
  ───────────────────────────────────────────┼──────────
   Full Admin (AdministratorAccess policy)   │ 4 roles
   Broad Terraform/State access (elevated)   │ 4 roles
   AWS Service-Linked Roles (scoped)         │ 13 roles

  ---
  ## Tool Executions (2)
  1. ✅ aws-iam → list_roles (314ms)
  2. ✅ aws-iam → list_policies (174ms)

Related Examples

AI with Claude Code CLI — Use your Claude subscription instead of API tokens. Claude Code manages MCP servers via pass-through.
AI with API Providers — Multi-provider AI configuration with sessions and tools.

Key Files

File	Purpose
`atmos.yaml`	MCP servers, auth, AI provider, and toolchain configuration
`stacks/`	Stack configuration files
`components/terraform/`	Mock Terraform components