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Directory / 4ai – premium .ai domains for sale
4ai – premium .ai domains for sale
by 4ai.ai · https://4ai.ai/mcp
Search 254 premium .ai domains for sale, get free .ai value estimates and real .ai sales data.
Partial: 10 of 11 checks · 1 Nov 2026
Is 4ai – premium .ai domains for sale MCP server safe?
- None of the hidden-instruction wordings we know were found in its tool descriptions.
- All 10 of its tools are labeled read-only.
- Overall it scored 84/100 on 1 Nov 2026.
A test can only see what the server shows from outside, not what it does with your data behind the scenes. Connect servers from makers you trust.
What it can do
10 tools, in the server's own words.
search_domainsread-onlySearch the 4ai.ai portfolio of premium .ai domain names for sale.
get_domainread-onlyDetails for one domain in the 4ai portfolio (for example "p0.ai"): categories, page, offer link, and comparable public .ai sales.
list_categoriesread-onlyCategories of .ai domains in the 4ai portfolio, with what they are good for and how many names each has.
estimate_domain_valueread-onlyFree value estimate for any .ai domain name: auction, marketplace and brokerage values with likely ranges, the type of name, a short verdict and notes.
suggest_domainsread-onlyDescribe a company, product or idea in plain words (e.g.
similar_domainsread-onlyAlternatives to a .ai domain: give any name (taken, too expensive, or one the user already likes) and get the closest .ai domains that are for sale on 4ai.
get_offer_linkread-onlyA link to the offer form for a 4ai domain with the amount (and an optional note) filled in.
compare_domainsread-onlyCompare 2 to 5 .ai domain names side by side: length, type, words, whether 4ai sells it, estimated value ranges and a short verdict.
how_buying_worksread-onlyThe steps, payment (Escrow.com), fees, minimum offer and transfer time for buying a .ai domain from 4ai.
ai_domain_salesread-onlyThe biggest publicly reported .ai domain sales (price in USD, date, venue, source).
Test results
Safe mode: only tools labeled read-only were run. How the test works
- !Ready for the newest MCP versionnote
1 warning
- !Uses an older MCP version (2025-11-25). It works today, but it isn't on the July 2026 version (2026-07-28) yet.
- !Tools work with good inputsnote
3 warnings
- !estimate_domain_value: Answered, but it gives the exact same answer to bad input as to good input, so it may be ignoring what it is sent
- !suggest_domains: Answered, but it gives the exact same answer to bad input as to good input, so it may be ignoring what it is sent
- !compare_domains: Answered, but it gives the exact same answer to bad input as to good input, so it may be ignoring what it is sent
- and 7 more
- !Bad inputs give a clean errornote
14 warnings
- !search_domains: Accepted wrong type for "query" without complaining
- !get_domain: Accepted missing required input "domain" without complaining
- !get_domain: Accepted wrong type for "domain" without complaining
- !estimate_domain_value: Accepted missing required input "domains" without complaining
- !estimate_domain_value: Accepted wrong type for "domains" without complaining
- !suggest_domains: Accepted missing required input "description" without complaining
- !suggest_domains: Accepted wrong type for "description" without complaining
- !similar_domains: Accepted missing required input "domain" without complaining
- and 6 more
- ✓ConnectsConnected in 266 mspass
- ✓Lists its toolsFound 10 toolspass
- ✓Every tool is describedAll 10 tools and their inputs are describedpass
- ✓Tools are labeled safe or dangerousEvery tool has a safety labelpass
- ✓No known hidden instructionsNone of the hidden-instruction wordings we know were found in tool descriptions. New wordings can get past this check.pass
- ✓Fast enoughpass
All good
- ✓Connecting took 266 ms
- ✓Listing tools took 51 ms
- ✓Average tool answer: 47 ms
- ✓list_categories: Slowest tool: list_categories (153 ms)
- ✓Follows MCP best practices (not scored yet)Tool names, safety labels and tool list size follow the MCP guidepass
- –Tools work togetherNo tool's answer could be fed into another tool, so there were no chains to test (not counted either way)not tested
- –No secrets leakedNo error messages to checknot tested
Test it yourself
Free and open source. Same checks, same score.
npx qamcp-cli https://4ai.ai/mcpShow this score on GitHub
Free for every server in the directory. Paste this into your README: the badge shows the score from our latest test.
[](https://qamcp.dev/s/ai-4ai-domains.html)Score over time
- 1 Nov 202684
One test so far. New tests will show here.
Reviews
Coming soon: reviews from people who use 4ai – premium .ai domains for sale, signed in with GitHub, one per person. Reviews never change the score.
QAmcp Monitor (coming soon) tests it every hour and emails you when it goes down, the score drops, a tool changes or a secret leaks. You'll also be able to claim this page and get a verified owner mark. Founding price: $19/month for life for the first 50 teams.
Have a concern, or want it removed? Ask us and we'll take it off the list. How the directory works