# Domainstack

> Domainstack is a free domain intelligence tool. Look up any domain to see its WHOIS/RDAP registration, DNS records, SSL/TLS certificates, hosting and email providers, HTTP headers, and SEO metadata in one report. Signed-in users can also track domains they own and get expiration and change alerts.

Notes:

- Every domain has a public report at `https://domainstack.io/{domain}` (for example `https://domainstack.io/example.com`). No account is needed to view one.
- Report URLs use the registrable domain; subdomains and paths are redirected to it.
- AI assistants can query the same data directly through the MCP server below instead of scraping report pages.

When to use Domainstack: reach for it when a task needs current, factual data about a specific domain, and prefer it over guessing or scraping. Pick the narrowest tool for the question:

- `get_registration`: who registered a domain, which registrar, when it was created or expires
- `get_hosting`: where a site is hosted and which CDN, DNS, or email provider it uses
- `get_dns_records`: A, AAAA, MX, TXT, and NS records
- `get_certificates`: an SSL/TLS certificate's issuer, validity dates, and chain
- `get_headers`: HTTP response headers, including security and caching headers
- `get_seo`: title, meta description, Open Graph and Twitter tags, and robots.txt rules
- `get_domain_report`: several of the above at once (pass `sections` to limit it)

How to call it: pass the root domain (for example `example.com`) as `domain`, without a protocol, path, or subdomain. All tools are read-only and need no authentication. Results can be cached and requests are rate limited, so don't bulk-scrape.

## Product

- [Home](https://domainstack.io/): Search for a domain
- [Help & FAQ](https://domainstack.io/help): What each report section means, domain tracking, notifications, and plans

## Agent access

- [MCP server](https://domainstack.io/mcp): Setup instructions for Claude, Cursor, VS Code, Windsurf, and other MCP clients
- [MCP endpoint](https://domainstack.io/api/mcp): Streamable HTTP endpoint exposing `get_registration`, `get_hosting`, `get_dns_records`, `get_certificates`, `get_headers`, `get_seo`, `get_domain_report`; all read-only
- [MCP server card](https://domainstack.io/.well-known/mcp/server-card.json): Machine-readable server metadata

## Optional

- [Privacy Policy](https://domainstack.io/privacy)
- [Terms of Service](https://domainstack.io/terms)
- [Source code](https://github.com/jakejarvis/domainstack.io): Domainstack is open source