FabTally Valid MCP MCP server

A read-only, stateless validation suite for developers and agents. It validates EU VAT numbers against VIES, verifies IBAN checksums, tests email syntax and MX records, resolves place names to ISO codes, and decodes VINs. The service is keyless, stores no PII, and charges per call via USDC on Base or prepaid credits.

Endpoint and access

No sign-in: your client connects and lists tools immediately, with no account or key.

No sign-inEndpoint checked 2026-10-05Operated by Sunstone Soft

MCP endpoint (Streamable HTTP)

https://valid.fabtally.com/mcp

Vendor documentation

What you can do with it

Validate EU VAT numbers live against VIES
Verify IBAN mod-97 checksums and bank codes
Test email syntax, MX records, and disposable domains
Decode VINs to make, model, and year

Tools advertised by the last live check:

validate_vat
validate_iban
validate_email
geo_lookup
decode_vin

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers a Streamable HTTP server. Use --scope project to write .mcp.json for the repo.

Claude Code configuration

claude mcp add --transport http fabtally-valid-mcp https://valid.fabtally.com/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).

Codex configuration

codex mcp add fabtally-valid-mcp --url https://valid.fabtally.com/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable fabtally-valid-mcp in your MCP settings.

Cursor configuration

{
  "mcpServers": {
    "fabtally-valid-mcp": {
      "url": "https://valid.fabtally.com/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure). The type must be streamableHttp for a remote HTTP server.

Cline configuration

{
  "mcpServers": {
    "fabtally-valid-mcp": {
      "type": "streamableHttp",
      "url": "https://valid.fabtally.com/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start fabtally-valid-mcp and inspect its tools.

VS Code configuration

{
  "servers": {
    "fabtally-valid-mcp": {
      "type": "http",
      "url": "https://valid.fabtally.com/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.

Gemini CLI configuration

gemini mcp add --transport http fabtally-valid-mcp https://valid.fabtally.com/mcp

Claude Desktop

Merge this into claude_desktop_config.json (macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\), then restart Claude Desktop.

Claude Desktop configuration

{
  "mcpServers": {
    "fabtally-valid-mcp": {
      "url": "https://valid.fabtally.com/mcp"
    }
  }
}

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.

Windsurf configuration

{
  "mcpServers": {
    "fabtally-valid-mcp": {
      "serverUrl": "https://valid.fabtally.com/mcp"
    }
  }
}

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