If you build apps, run an agency or do domain research, you probably pay for (or copy-paste between) a pile of small tools: a WHOIS lookup here, a DNS checker there, an email-security test somewhere else. The DomScan lifetime deal on AppSumo puts all of that behind one API and an MCP server your AI assistant can call, starting at $39 once.
Early buyers love it: 4.90 stars from 20 reviews, with no rating below 4 stars. But the deal only launched on November 6, so every review is less than a week old. DomScan’s own monthly plans are also very cheap, so the lifetime deal isn’t automatically the best buy. Let me walk you through what it does, what the credits really get you, and who should skip it.
DomScan in 30 seconds
| What it is | An API and MCP server for domain, DNS, WHOIS, website, email and security data |
| Works with | REST API, MCP clients such as Claude, ChatGPT and Cursor, Python and Node SDKs, a CLI and a web playground |
| Best for | Developers, AI-agent builders, agencies managing many domains, domainers and security consultants |
| AppSumo price | $39 (10,000 credits a month), $99 (30,000), $249 (100,000) or $499 (250,000) |
| Deal type | Sold by AppSumo (not a Marketplace listing), license activation with no codes or stacking |
| Deal ends | No end date shown on AppSumo |
| Refund window | 60 days |
What DomScan actually does for you
DomScan started as a small MCP tool. Founder Esteve Castells was tired of AI chatbots suggesting domain names that were already taken, so he built a checker his AI could call. It has since grown into a catalog of 60+ endpoints in six groups.
1. Domain research and availability
Check whether a name is free across 1,100+ TLDs, pull WHOIS and RDAP records, get AI name suggestions, compare domains, see renewal pricing and get a rough valuation. One reviewer’s agency uses the status endpoint to verify every domain before recommending it to clients, because they had been suggesting names that looked free but weren’t.
2. DNS, email security and site checks
You get DNS lookups, subdomain discovery, SSL and security-header checks, domain reputation, typosquatting detection and email authentication tests (SPF, DKIM and DMARC). This is where buyers found real problems: one agency owner found 39 of their client mail domains missing SPF, DKIM or DMARC, and a cybersecurity consultant uses it for OSINT checks on clients’ public footprint.
3. Web data and SEO audits
DomScan can scrape public pages as HTML, Markdown or LLM-ready text, trace redirect chains, detect a site’s tech stack, and run on-page SEO, sitemap, hreflang, broken-link and structured-data checks. It isn’t a replacement for a full SEO suite, but it’s handy when you want your AI agent to read and check a page in the same workflow.
4. Monitoring, alerts and bulk jobs
The domain watchlist emails you 30, 14, 7 and 1 days before a domain expires, and alerts you when a domain you lost or want becomes available again. Brand monitoring and batch jobs (up to 100 queued requests at a time) are also included. One buyer is watching a single domain they plan to grab the moment it drops.
How the credits work
Every tier gives you a monthly credit allowance that resets on the 1st of each month (UTC). Unused monthly credits expire; they don’t roll over. Each operation has its own published cost, and you can do a free dry run to see the cost before you spend anything. A few examples from DomScan’s site and buyer reviews:
| Operation | Credits |
|---|---|
| Domain availability check | 1 |
| Robots.txt check | 1 |
| Redirect chain trace | 2 |
| On-page SEO audit, broken-link check | 2 to 6 |
| Name availability across platforms | 5 |
| Web scraping (per page) | 0 to 20 |
| Portfolio audit (up to 50 domains) | 25 |
So Tier 1’s 10,000 credits is a lot for most people: up to 10,000 availability checks, or hundreds of SEO and security audits, every month. The agency owner with 140 domains used about 400 credits on a full audit, watchlist and appraisal run. If you plan to scrape thousands of pages a month, do the math with the higher per-page costs first.
DomScan lifetime deal vs. paying monthly
Here’s the honest part. DomScan’s own pricing is already low. There’s a free plan with 1,000 credits a month, monthly plans start at $6, and one-time credit packs (which never expire) start at $10 for 10,000 credits. So compare carefully:
| AppSumo tier | Credits/month | Cheapest direct plan that covers it | Pays for itself after |
|---|---|---|---|
| Tier 1: $39 | 10,000 | Starter: $6/mo for 25,000 | About 7 months |
| Tier 2: $99 | 30,000 | Pro: $19/mo for 100,000 | About 5 months |
| Tier 3: $249 | 100,000 | Pro: $19/mo for 100,000 | About 13 months |
| Tier 4: $499 | 250,000 | Scale: $49/mo for 500,000 | About 10 months |
What this tells you: if you’ll use DomScan every month for a year or more, the lifetime deal wins. If you only need a few hundred checks now and then, the free 1,000 monthly credits or a $10 pack that never expires is the smarter buy. Also note that the monthly plans give more credits per dollar in the short term (Starter gives 25,000 credits for $6), so the deal is a bet on long-term use.
Compared with bigger data providers, DomScan is cheap and simple. DataForSEO is pay-as-you-go with a $50 minimum top-up and is built mainly around SEO data, and WhoisXML API focuses on WHOIS and DNS data with its own credit plans. AppSumo lists DataForSEO and ScraperAPI as the tools DomScan replaces, but those are far more mature products, so think of DomScan as a lighter, all-in-one option rather than a like-for-like swap.
What buyers like
- The MCP setup is quick. Several buyers connected it to Claude or Claude Code in a minute or two, including one who says they’re not a coder and just asked Claude to find the setup steps.
- Transparent pricing per check. Buyers like seeing the credit cost upfront and dry-running calls before spending.
- Honest results. DomScan marks blocked or timed-out checks as “unknown” instead of guessing, which matters when you’re deciding whether a domain is really free.
- Fast support. Two reviewers had problems (a failed first connection and watchlist notification bugs) that the team fixed on a weekend, the same day.
What to watch out for
There are no low ratings yet, but the most detailed review (4 stars, from an agency managing 140 domains) points out real limits:
- The watchlist is capped at 100 domains, and the docs didn’t say so. The reviewer found out when adds started failing mid-sync and lost about 30 credits.
- Some alerts are webhook-only. Expiry alerts come by email, but DNS, SSL and typosquat alerts only go to webhooks.
- You can’t change the notification email on a watched domain without removing and re-adding it.
- Valuations are rough. One domain came back at $6,840 to $27,958. Use them as a starting point, not a price tag.
Beyond that, keep two bigger things in mind. First, DomScan is a young, bootstrapped company of 1 to 10 people in Spain, founded in 2025. A lifetime deal is only worth it if the product is still around in a few years. Second, it’s a developer tool at heart. There’s a dashboard and a playground, but you’ll get the most from it through the API or an AI assistant. If you just want to look up one domain occasionally, free WHOIS sites are enough.
Pros and cons
| Pros | Cons |
|---|---|
| Domain, DNS, WHOIS, email, SEO and security checks in one API | Monthly credits expire and don’t roll over |
| MCP server works with Claude, ChatGPT and Cursor in minutes | Watchlist capped at 100 domains |
| Clear per-check credit costs with free dry runs | DNS, SSL and typosquat alerts are webhook-only |
| Tier 1’s 10,000 credits a month is plenty for most users | Vendor’s own plans are cheap, so the deal only wins with long-term use |
| Quick, responsive founder-led support | Very new product and company, with only a week of reviews |
Other deals that pair well with DomScan
Buyers use DomScan to check prospect domains and email setups before outreach. If that’s you, our WarmySender review covers warming up and sending cold email, and LeadOcean and NotiQ help you find the leads in the first place. Building a new site on the domain you just found? Take a look at our Grigora review.
For more deals worth a look before November 27, see our best AppSumo Black Friday deals for 2026.
Should you buy the DomScan lifetime deal?
Buy it if you build apps or AI agents that need domain or web data, manage dozens of domains for clients, or do domain and security research every week. Tier 1 at $39 covers most people, and it pays for itself in well under a year compared with the monthly plans.
Skip it if you only check a domain now and then. Start on DomScan’s free 1,000 credits a month instead and upgrade only if you hit the limit. If you do buy, use the 60-day refund window to test the exact endpoints you need, especially the watchlist if you manage more than 100 domains.
DomScan FAQ
Do I need to know how to code?
Not strictly. You can use the web playground or connect the MCP server to an AI assistant and ask questions in plain English. But the tool is built for API and agent workflows, so non-technical users get less out of it.
Do unused credits roll over?
No. Your AppSumo allowance refreshes on the 1st of each month at 00:00 UTC, and unused monthly credits expire. Credits you buy separately in packs don’t expire.
Can I stack codes?
No. You pick one of four tiers and can upgrade or downgrade between them later. You must activate your license within 60 days of purchase.
Does DomScan verify someone’s identity?
No. It reports public signals such as contact details, organization data and social handles, but it doesn’t do KYC or prove legal identity.
Disclosure: This post contains affiliate links. If you buy through them, ThePromotes may earn a commission at no extra cost to you. Prices and deal terms were checked on November 12, 2026 and can change.
