Check a top-level domain against the IANA root zone
Check a top-level domain against the IANA root zone - exists or not, ccTLD, gTLD or IDN type, RDAP server URLs and the current TLD count
Answeringour last check, 2026-10-20
1 of 1checks answered this week
453 msmedian answer time
$0.01listed price per call
$0.01price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
GET https://saylorinnovations.com/api/domain/tld
| Category | Everything else |
|---|---|
| Provider host | saylorinnovations.com |
| Networks | eip155:137, eip155:42161, eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp |
| Payment schemes | exact |
| Self-reported calls, 30 days | 0 from 0 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-20 | valid payment request | 402 | $0.01 | 453 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"tld": "dev"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"tld": {
"description": "Top-level domain with or without the dot, e.g. dev, uk or xn--p1ai",
"type": "string"
}
},
"required": [
"tld"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"exists_in_iana_root": {
"description": "Exists in iana root",
"type": "boolean"
},
"idn": {
"description": "True for internationalised (xn--) TLDs",
"type": "boolean"
},
"kind": {
"description": "Kind of record",
"type": [
"string",
"null"
]
},
"length": {
"description": "Length",
"type": [
"number",
"null"
]
},
"note": {
"description": "Caveat or context for reading the result"
},
"rdap_available": {
"description": "Rdap available",
"type": "boolean"
},
"rdap_servers": {
"description": "Rdap servers",
"type": "array"
},
"root_zone_version": {
"description": "Root zone version",
"type": [
"string",
"null"
]
},
"source": {
"description": "Data source the values come from",
"type": "string"
},
"tld": {
"description": "Top-level domain checked",
"type": "string"
},
"total_tlds": {
"description": "Total tlds",
"type": "number"
}
},
"required": [
"tld",
"exists_in_iana_root"
],
"type": "object"
},
"type": {
"const": "json",
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}