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TLD & Public Suffix Info Lookup
x402
TLD & Public Suffix Info Lookup is a paid API for AI agents from 2s.io, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).
Returns structured TLD metadata and Public Suffix List analysis for a given TLD label or full domain, including registrable domain, suffix section, and IANA registry details.
Price / call$0.001
Success—
StatusUnknown
How this service works
TLD registry intelligence and public-suffix analysis. Mode 1 (tld=io): IANA root-zone metadata — type (generic / country-code / sponsored), managing organization, unicode form for IDN TLDs. Mode 2 (domain=shop.example.co.uk): full Public Suffix List algorithm — the effective public suffix (co.uk), the registrable domain (example.co.uk), the subdomain part, the matched PSL rule, and whether the suffix is ICANN (registry) or private (corporate, e.g. github.io / s3.amazonaws.com) — plus the root-zone metadata for its TLD. Correctly handles wildcard and exception rules and IDN/punycode input. Use for cookie scoping, per-registrant rate limiting, URL dedup, and abuse/phishing analysis. Data: IANA root zone + Mozilla PSL, refreshed weekly.
Output
A JSON object with ok:true, the TLD's type (e.g. country-code or generic), its IANA manager, the matched PSL rule, the public suffix, the registrable domain, any subdomain, and source attribution from IANA and Mozilla PSL.
Example use cases
Example prompt
“What type of TLD is .co.uk, who manages it, and what would be the registrable domain for shop.example.co.uk?”
Technical details
Endpoint
GEThttps://2s.io/api/tld/infoWhen to prefer
Use this endpoint when you need authoritative TLD classification (country-code vs generic), IANA manager information, or need to decompose a full domain into its public suffix, registrable domain, and subdomain according to the Mozilla PSL — especially for domain validation, security checks, or cookie-scoping logic.
Side effects
- Missing both tld and domain query params — validation error
- Invalid or unrecognized TLD not in IANA root zone — may return empty items or no match
- Supplying both tld and domain simultaneously (XOR constraint violated) — input error
- Network or upstream IANA/PSL data unavailability — service error
- Payment failure via x402 — 402 response before data is returned
Input
{
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"tld": "com"
}
}
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Output
{
"data": {
"ok": true,
"meta": {
"sources": [
{
"url": "https://www.iana.org/domains/root/db",
"provider": "IANA Root Zone Database (iana.org)"
},
{
"url": "https://publicsuffix.org/",
"provider": "Mozilla Public Suffix List (publicsuffix.org), MPL 2.0"
}
]
},
"items": [
{
"tld": {
"tld": "com",
"type": "generic",
"manager": "VeriSign Global Registry Services",
"unicodeTld": "com"
},
"query": "com",
"suffix": null
}
],
"total": 1,
"source": {
"url": "https://www.iana.org/domains/root/db",
"license": "Public domain (US-administered registry data); PSL component is MPL 2.0 (see meta.sources).",
"provider": "IANA Root Zone Database (iana.org)"
}
},
"meta": {
"cost": {
"usd": 0.001,
"tier": 0
},
"caller": "x402",
"version": null,
"endpoint": "tld.info",
"settlement": {
"txHash": "0xc675f2d212a06b99b51c8b28f0771aac70e9b538b30af308b5803144a64fc7bd",
"network": "eip155:8453",
"success": true
}
}
}Tags
x402
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