About DNSniffer
A domain-intelligence index built for security researchers, developers, and anyone who wants to grep the public web. Aggregated from Certificate Transparency logs and DNS zone files - primary sources, no resellers.
> Domain intelligence should be a commodity. CT logs and zone files are public; the cost is just compute and storage.
> We index the firehose so you don't have to. Free read access via web UI and JSON API, plus daily-rebuilt CSV exports for bulk users.
Zone-File Data
CZDS-fed daily ingest of TLD zone files. Full visibility into registered names per zone.
CT Log Stream
Real-time SSL certificates pulled directly from Certificate Transparency operators.
Continuous Updates
Axeman-style scheduler keeps the index within minutes of the latest CT entry.
Search & Filter
Wildcards, TLD filters, issuer filters, SSL-status filters - both UI and API.
Public API
Read-only JSON at /api/v1 with cursor pagination and an OpenAPI spec.
Global Coverage
Hundreds of TLDs, every public-trust CA. The same view a passive observer has.