How do I check if my state machine definition is too large?

You can use the `check_definition_compliance` tool by providing your definition size in KB to identify if it exceeds the 104,857 character limit.

What is the difference between Standard and Express workflow limits?

Standard workflows allow up to 256 KB payloads and 1 year duration, while Express workflows are limited to 32 KB payloads and 5 minutes duration. Use `calculate_workflow_capacities` to see the exact values.

Can I check for performance bottlenecks?

Yes, the `evaluate_performance_recommendations` tool checks if your state count or nesting depth exceeds AWS best practices.

AWS Step Functions Limits Calculator MCP Connector for Claude

A+

Validate AWS Step Functions configurations against hard service limits and performance best practices.

4 tools Official Updated Oct 1, 2026 Official Vinkius Partner

More Details Connect to Claude

This MCP server provides deterministic tools to evaluate AWS Step Functions state machine configurations. It checks for hard service limits such as definition size and execution history capacity, while also providing performance recommendations for state counts and nesting depth. Use check_definition_compliance to verify if your JSON definition or event history exceeds AWS constraints, and calculate_workflow_capacities to determine payload and duration limits for Standard or Express workflows.

awsstep-functionsserverlessworkflowcloud

Connect to Claude

Subscribe on Vinkius, then add this connector to Claude.ai or Claude Code.

① Claude.ai (web app)

Go to Settings → Connectors → Add custom connector
Paste the MCP endpoint URL below

https://edge.vinkius.com/vk_preview_qkPtjUbLkm3pLQphGXK1NiBT7OrDcKaaaU3er0wt/mcp

② Claude Code (terminal)

claude mcp add --transport http aws-step-functions-limits-calculator https://edge.vinkius.com/vk_preview_qkPtjUbLkm3pLQphGXK1NiBT7OrDcKaaaU3er0wt/mcp

③ Claude Desktop

Add to claude_desktop_config.json:

{
  "mcpServers": {
    "aws-step-functions-limits-calculator": {
      "url": "https://edge.vinkius.com/vk_preview_qkPtjUbLkm3pLQphGXK1NiBT7OrDcKaaaU3er0wt/mcp"
    }
  }
}

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