com.aether-layer/eu-vat-validate
Aether Layer: EU VAT number validation (VIES)
Is the Aether Layer MCP server down? No. It answered initialize and tools/list in the probe of 2026-11-13.
Validates EU VAT numbers: local format/checksum for 27 states + XI, then VIES (cached 24 h).
alive probed 2026-11-14 · unchanged since 2026-11-13 · HTTP 200
- Endpoint
- https://aether-layer.com/api/mcp?src=mcpreg (streamable-http)
- Host
- aether-layer.com
- Protocol
- 2025-11-25
- Reports itself as
- aether-layer-agent-service-gateway 0.3.0
- Capabilities
- tools
- Instructions
- 509 characters
- Of a 1M window
- 0.2 % of a 1M context window
- Count
- 1.6k tokens in Claude Opus 5.5, exact, measured 2026-11-13. With the Claude Code prefix mcp__…__ on each tool name: 1.6k. The o200k_base estimate is 915. Counted again when the tool definitions change. Method.
- Website
- https://aether-layer.com/en/vat-api
- Registry
- active, updated 2026-11-13 · registry entry
Most expensive tools
The Claude column scales the o200k estimate of each tool by this server's ratio of exact to estimate, 1.70×.
| Tool | ≈ Claude tokens | o200k estimate | Share of this server |
|---|---|---|---|
| validate_vat | 1 048 | 618 | 68 % |
| agent_readiness_check | 503 | 297 | 32 % |
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Badge for the README
The result of the latest probe, the tool count and the token cost. The feed has an entry for every probe that changed them.
A mail when this server changes
Stops answering, comes back, tool set or cost changes. One confirmation mail first, a stop link in every mail.
For the publisher
- The server answers initialize and tools/list. Nothing to fix.
Fixed something? Probe it now, with the same steps as the daily run. This page updates with the next daily run.