List subdomains of a domain from Certificate Transparency logs
List subdomains of a domain from Certificate Transparency logs - first and last seen dates, certificate counts and issuer, plus wildcard certificate count
Answers HTTP 404 without x402 payment termsour last check, 2026-10-18
0 of 1checks answered this week
n/amedian answer time
$0.01listed price per call
n/aprice it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
GET https://saylorinnovations.com/api/domain/subdomains
| Category | Everything else |
|---|---|
| Provider host | saylorinnovations.com |
| Networks | eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-18 | no x402 terms | 404 | 218 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"domain": "example.com",
"limit": "25"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET",
"POST",
"PUT",
"PATCH",
"DELETE",
"HEAD"
],
"type": "string"
},
"queryParams": {
"properties": {
"domain": {
"description": "Root domain such as example.com",
"type": "string"
},
"limit": {
"description": "optional 1-300, default 100",
"type": "string"
}
},
"required": [
"domain"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"certificates_scanned": {
"description": "Certificates scanned",
"type": "number"
},
"domain": {
"description": "Domain name",
"type": "string"
},
"note": {
"description": "Caveat or context for reading the result",
"type": "string"
},
"source": {
"description": "Data source the values come from",
"type": "string"
},
"subdomains": {
"type": "array"
},
"subdomains_found": {
"description": "Subdomains found",
"type": "number"
},
"truncated": {
"description": "True when the list was cut at the limit",
"type": "boolean"
},
"wildcard_certificates": {
"description": "Wildcard certificates",
"type": "number"
}
},
"required": [
"domain",
"subdomains_found",
"subdomains"
],
"type": "object"
},
"type": {
"const": "json",
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}