Validates domain names against RFC standards, checking syntax, length limits, and character restrictions. Access via MCP in AI coding assistants or GET /v1/validate/domain REST endpoint. Returns boolean validation status with detailed error messages for invalid domains. Handles internationalized domains, subdomains, and edge cases like trailing dots.
curl "https://tinyfn.io/v1/validate/domain" \
-H "X-API-Key: YOUR_API_KEY"const response = await fetch('https://tinyfn.io/v1/validate/domain', {
headers: { 'X-API-Key': 'YOUR_API_KEY' }
});
const data = await response.json();
console.log(data);import requests
response = requests.get('https://tinyfn.io/v1/validate/domain',
headers={'X-API-Key': 'YOUR_API_KEY'})
data = response.json()
print(data)Connect your AI agent (Claude, Cursor, Windsurf, etc.) to TinyFn's validation tools:
{
"mcpServers": {
"tinyfn-validation": {
"url": "https://tinyfn.io/mcp/validation",
"headers": {
"X-API-Key": "YOUR_API_KEY"
}
}
}
}Validates RFC 1035/1123 compliance: max 253 characters total, 63 per label, valid characters (a-z, 0-9, hyphens), no consecutive hyphens, and proper label structure.
Yes, supports IDN validation including punycode conversion. Validates both Unicode and ASCII representations of international domains.
Simply ask your AI assistant to validate a domain - it will call the TinyFn validation tool and return structured results with pass/fail status and specific error details.
Yes, validates multi-level domains like api.subdomain.example.com, checking each label separately while enforcing overall length and structure rules.
This validates syntax only - whether a domain name is properly formatted. It doesn't check if the domain actually exists or resolves in DNS.
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