Live
Technology Lookup
Detects the technologies a website runs on (CMS, ecommerce platform, JavaScript frameworks, analytics, advertising pixels, CDN, hosting, web server…
76 live · 38 launching soon
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114 APIs in 13 categories, all on one key, one response format and one credit wallet. Search by site, data type or task, or pick a category.
13 of 114 APIs in Domains and SEO
Domains and SEO
Everything about a domain: registration, DNS, SSL, email security, technologies, hosting, subdomains, shared Analytics/AdSense IDs, authority score, referring domains and similar sites.
Live
WHOIS Lookup
Raw port-43 WHOIS text from the registry (and the registrar for thin registries such as .com) plus parsed registrar, dates, status and name servers
Live
Domain Authority
How authoritative a domain is on the open web, from the Common Crawl domain-level web graph (over 100 million domains and about 2 billion links…
Live
Referring Domains (Backlinks)
The domains that link to a domain, from the Common Crawl domain-level web graph, sorted by the referrer's authority (best first), each with its 0-100…
Live
Similar Sites
Websites similar to a domain, found by co-citation in the Common Crawl domain-level web graph
Live
Reverse Analytics & AdSense ID Lookup
Find other websites that share a Google Analytics, Google Tag Manager, AdSense, Meta Pixel or other tracking ID
3 credits / requestDocs
Live
DNS Lookup
DNS records (A, AAAA, MX, NS, TXT, CNAME, SOA, CAA) resolved through two independent DNS-over-HTTPS networks (Cloudflare and Google) with a…
Live
Domain Availability
Registry-level check of whether a domain is registered, via RDAP (WHOIS fallback for TLDs without RDAP)
Live
Email Security Audit
Checks how well a domain is protected against email spoofing
Live
IP Lookup (ASN, Network, Hosting)
Who runs an IP address or a domain's servers
Live
RDAP Lookup
Structured registration data for a domain from its registry's RDAP server
Live
SSL Certificate Check
Connects to a host over TLS and reports whether its certificate is trusted, who issued it, the names it covers, when it expires (with days…
Live
Subdomain Finder
Finds a domain's subdomains from public Certificate Transparency logs (crt.sh, with Cert Spotter as a fallback), with first and last seen dates and…
Browse by use case
Start from what you're trying to do
Each use case lists the APIs to combine, in order, with monitors where they help.
- Lead generationBuild B2B lead lists with emails and phones
- SEO and rank trackingRankings, backlinks, authority and site audits
- Review and reputation monitoringCollect reviews and get alerts on new ones
- Competitor and market researchSee a competitor's stack, traffic signals and changes
- E-commerce and price monitoringTrack products, prices and stock
- AI agents and RAGGive LLMs live web data and clean Markdown
- Local business dataBusinesses, ratings and reviews by location
- Security and domain monitoringExpiry, SSL, DNS and email-security alerts
- App store intelligenceTrack apps, rankings and reviews
- Social and video analyticsCreator stats, videos, comments and ads
- Recruiting and job market dataOpen roles and hiring signals by company
- Real estate and travel dataListings, hotel and flight prices, property history
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Prefer reading specs? The API reference lists every parameter, and openapi.json has them all in one file.