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SiteCheck · api.sitecheck-api.workers.dev

Subdomains of a domain seen in certificate transparency logs: each…

Subdomains of a domain seen in certificate transparency logs: each name with the first and last certificate dates, the issuer of the newest certificate, and wildcard entries flagged. Deduplicated, newest first, up to 500. CertSpotter is read first, but its free index is partial, so those answers are marked truncated with the reason; crt.sh is the fallback and is complete. Only public certificates are listed.

Ready now2 calls · 2 buyers in 30 days

Input

A registered domain like example.com

Sample response

Published by the provider. Your run returns a fresh response.

response9 keys
checkedAt"2026-10-15T14:20:11.463Z"
count42
domain"github.com"
notenull
source"CertSpotter (certificate transparency), 5 pages of 100 issuances"
subdomains3 items
total42
truncatedtrue
truncatedReason"CertSpotter's free index lists only part of the certificates (github.com: 42 names there, 118 on crt.sh on 15 Oct); crt.sh is the full search"
responseobject, 9 keys
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MCP URL

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Terminalbash
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Track record

Paid calls, last 30 days
2
Buyers, last 30 days
2
Last paid call

Reported by the x402 directory.

A$0.0029 per call