Domain CheckCAUTION
Fast, universal domain availability checker - 1,200+ TLDs, pattern generation, RDAP with WHOIS fallback. CLI + Rust library + MCP server for AI agents.
Overview
From the repository's own README, as read at the audited commit. Badges and raw HTML are left out.
Universal domain exploration engine: fast domain availability checks across the internet — as a CLI, Rust library, and MCP server for AI agents.
[](https://formulae.brew.sh/formula/domain-check) [](https://crates.io/crates/domain-check) [](https://crates.io/crates/domain-check-lib) [](https://crates.io/crates/domain-check-mcp) [](https://crates.io/crates/domain-check) [](#license)
Quick Links: Installation | Quick Start | Use Cases | Output Formats | Presets | Configuration | Automation | Library | MCP Server | FAQ | Contributing
Why domain-check
- 1,200+ TLDs out of the box — IANA bootstrap loads the full registry automatically. No config needed. 32 hardcoded TLDs work offline as fallback.
- Dual-protocol engine — RDAP-first with automatic WHOIS fallback. IANA server discovery covers ~189 ccTLDs that lack RDAP (
.es,.co,.eu,.jp). - Fast — up to 100 concurrent checks, streaming results as they complete. 2.7 MB release binary.
- Domain generation — pattern expansion (
\w=letter,\d=digit,?=either), prefix/suffix permutatio
528a560b9f3fOBSERVED · 2026-10-05Trust audit
CAUTIONgrade B · trust 89/100 Install with care. The audit found things worth knowing before you trust its output.
| Layer | What it checks | Result |
|---|---|---|
| L0 | Provenance & inventory | PASS |
| L1 | Static analysis of the code | WARN |
| L2 | Instruction surface (what it tells the agent) | PASS |
| L3 | Class-specific surface | PASS |
| L4 | Behavioural (sandbox) | SKIPPED |
What the source does
- Filesystem
- declared (2 observation(s))
- Network
- none-observed
- Shell
- none-observed
- Dependencies
- pinned
- Secrets in source
- none-found
Findings (5)
with_env_vars(&[("DC_CONFIG", "/etc/dc.toml")], || {assert_eq!(config.config, Some("/etc/dc.toml".to_string()));sudo apt-get update
sudo apt-get install -y musl-tools
Gates applied: no_behavioural_pass.
528a560b9f3ffull audit observations/trust-audit/mcp-server/saidutt46__domain-check-2.json · Report an issue / request a re-scanAudit history
Every audit this server has had. A grade with a past is a grade somebody is still checking.
| Date | Source | Verdict | Grade | Score | Change |
|---|---|---|---|---|---|
| 2026-10-05 | 528a560b9f3f | CAUTION | B | 89 | first audit |
Questions
What is the Domain Check MCP server?
Fast, universal domain availability checker - 1,200+ TLDs, pattern generation, RDAP with WHOIS fallback. CLI + Rust library + MCP server for AI agents.
Is Domain Check safe to connect to an agent?
With care. The audit graded it B (89/100) and found 5 things worth knowing before you trust this server, listed below with the exact line each was found on.
What credentials does Domain Check need?
No credential environment variables were found in its source, so it appears to need none.
How does Domain Check run?
It speaks stdio, so it runs as a local process your client starts.
How current is this page?
The grade is for one exact copy of the source (528a560b9f3f), read on 2026-10-05. The repository is watched and re-audited when it changes.