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mcp/harbor
Verified official

Aether Layer: EU VAT number validation (VIES) MCP

v0.3.1

com.aether-layer/eu-vat-validate

Validates EU VAT numbers: local format/checksum for 27 states + XI, then VIES (cached 24 h).

transport:streamable-http tools:2
Website

Target client

run in your project directory 

claude mcp add --transport http eu-vat-validate https://aether-layer.com/api/mcp?src=mcpreg

setup guides: Claude Code Claude Desktop Cursor VS Code Zed Windsurf Cline Gemini CLI Grok ChatGPT Claude.ai LangChain

Adds it for this project only. Append --scope user to make it available everywhere. Claude Code docs

validate_vat

validate vat

agent_readiness_check

agent readiness check

All 2 tools, one page each

Mutating and Read-only are read off each tool's name, not its schema — a hint, not a guarantee. Check the server's own documentation before granting access.