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FabTally Valid — validation suite for developers & agents

valid.fabtally.com

One unified per-call validation suite: vat (EU VAT format/checksum + live VIES lookup), iban (mod-97 + bank code), email (syntax + live MX + disposable-domain + role flag), geo (country/state/city ISO lookup), vin (format/check-digit + NHTSA make/model/year). Per-call via x402 (USDC on Base) or a prepaid credit key. Also an MCP server.

35
Basic
Agentic Readiness Score
+20 OpenAPI +15 structured API missing +25 llms.txt
Raise this score to 95+
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Agentic Signals

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llms.txt
Not found
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ai-plugin.json
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OpenAPI Spec
Found
🔗
Structured API
Found
🛡
AI Bot Access (robots.txt) ↗
Not specified
🏷
Schema.org Markup
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MCP Server
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Agentic Ready 35/100 

            

        

        

        

        
        

            
OpenAPI Spec (preview)

            
{
  "openapi": "3.1.0",
  "info": {
    "title": "FabTally Valid — validation suite for developers & agents",
    "version": "1.0.0",
    "description": "One unified, per-call validation bundle: vat (EU VAT format/checksum + LIVE VIES lookup returning the registered name/address), iban (mod-97 checksum + country + bank-code extraction), email (syntax + live MX/DNS + disposable-domain detection + role-address flag, no storage/SMTP), geo (country/subdivision/city reference lookup over a bundled