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Iurii Rogulia, senior full-stack software engineer. Professionally building software since 2001.

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1 article

Building an MCP Server for VAT Validation: Why It’s Two Tools, Not One
September 18, 2026· 9 min
Building an MCP Server for VAT Validation: Why It’s Two Tools, Not One

Building the vatnode MCP server meant deciding whether format-checking and live VIES validation should be one tool or two.

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TypeScriptNode.js

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vatnode API

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MCPAPI DesignDeveloper ToolsAI Tooling
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