# Isitdns MCP server

Source: https://glimind.com/server/mcp-registry%2Fnet.isitdns%2Fisitdns
Registry id: `mcp-registry/net.isitdns/isitdns`
Status: live (checked 2026-10-26T19:53:00.960Z)

## Verdict

Isitdns MCP server answered 100% of Glimind's liveness checks over 30 days, better than 42% of MCP servers, with 600 ms median handshake and 0 outages in 90 days. Its agent-readiness grade is A (96/100) across 6 tools, costing an agent about 1,785 tokens to load. Checked every few minutes; no tool is ever called.

## Measurements (30 days)

| Metric | Value | Better than |
|---|---|---|
| Uptime, 30 days | 100% | 42% of MCP servers |
| Median handshake latency | 600 ms | 44% of MCP servers |
| p95 handshake latency | 2520 ms | — |
| Checks in 30 days | 4,891 | — |
| Outages, 90 days | 0 | — |
| Median recovery | — | — |
| Agent-readiness score | 96/100 (A) | 82% of MCP servers |
| Tools | 6 | — |
| Tool-list size for an agent | ~1,785 tokens | 55% of MCP servers |
| Days observed | 29 | — |

## Install

```json
{
  "mcpServers": {
    "isitdns-mcp-server": {
      "type": "http",
      "url": "https://isitdns.net/mcp"
    }
  }
}
```

Claude Code:

```sh
claude mcp add --transport http isitdns-mcp-server https://isitdns.net/mcp
```

## Tools (6)

- `check_domain`: Check a domain that is not working: whether the name resolves in public DNS, then the eleven-check audit of its zone, each row ok, warn, fail or skipped with wh
- `dig`: Dig one name and type at one board resolver, or at Cloudflare, Google, Quad9 and AdGuard side by side (resolver all): records, flags, rcode, EDE, latency. Not f
- `dnssec_chain`: Walk the DNSSEC chain from the root to one answer: DS and DNSKEY at each signed zone cut, key tags, signers, signature windows, the first link that breaks or go
- `registration`: Read a domain's registration from its registry's RDAP server: each status with what it means for resolution, the registration, expiry and change dates, the name
- `sweep_domain`: Sweep a zone's nameservers: the same names and types asked at a sample of its authoritative addresses, reporting disagreements, lame or silent servers, serial a
- `trace`: Trace a delegation from the root to the authority, like dig +trace: each referral and its glue, the one server that answered at each zone cut and any dial that 

Measured by Glimind (https://glimind.com): MCP handshake + tool list only, no tool is ever called. CC BY 4.0.