# WhoisJSON (npm · @whoisjson/mcp-server)

WHOIS, DNS, SSL, and domain availability lookups for AI assistants

- Trust score: 70/100 (medium)
- Change this week: +24
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-08-04

## Components

- npm · `@whoisjson/mcp-server`: 70/100 (this document), [markdown](https://verifymcp.io/servers/whoisjson-mcp-server/whoisjson-mcp-server.md), [page](https://verifymcp.io/servers/whoisjson-mcp-server/whoisjson-mcp-server)

## Channel facts

- Registry: `npm`
- Package: `@whoisjson/mcp-server`
- Version: `1.0.3`
- Transport: `stdio`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-08-04.

- **Supply Chain Security**: 86/100
  - No malware found by supply-chain analysis.
  - Only part of the dependency tree could be resolved (94 of 98), so this covers what we could see, not the whole tree.
  - No install/post-install scripts declared.
  - Only part of the dependency tree could be resolved (94 of 98), so this covers what we could see, not the whole tree.
- **Provenance & Transparency**: 45/100
  - Source repository is publicly reachable at the declared URL.
  - Provenance check failed: no build-provenance attestation is published.
  - Clear OSI-approved license (MIT).
  - Actively maintained (last published 117 days ago).
  - Disclosure check failed: no security disclosure policy was found in the source repository.
- **Schema Quality & AI Usability**: 77/100
  - AI-judged instruction clarity (excellent).
  - Tool/resource definitions use about 341 tokens (~85/item across 4 items; 4 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 30/100
  - Stability observed for 9 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### Claude

```bash
claude mcp add whoisjson-mcp-server -- npx -y @whoisjson/mcp-server
```

### Codex

```bash
codex mcp add whoisjson-mcp-server -- npx -y @whoisjson/mcp-server
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "whoisjson-mcp-server": {
      "type": "local",
      "command": [
        "npx",
        "-y",
        "@whoisjson/mcp-server"
      ],
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add whoisjson-mcp-server --command npx --arg -y --arg @whoisjson/mcp-server
```

### Hermes

```yaml
mcp_servers:
  whoisjson-mcp-server:
    command: "npx"
    args: ["-y", "@whoisjson/mcp-server"]
```

### Other

```json
{
  "mcpServers": {
    "whoisjson-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@whoisjson/mcp-server"
      ]
    }
  }
}
```

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-08-04 (score 70, +5)

- [functional improvement] Stability: unverified → 0.30

### 2026-08-03 (score 65, +29)

- [security regression] Provenance: unverified → fail
- [security improvement] Known CVEs: unverified → partial
- [security improvement] Install scripts: unverified → pass
- [security] Stability: Stability not yet verified: not enough scan history yet (needs a 30-day window).
- [functional improvement] Schema quality: unverified → excellent
- [functional improvement] License: unverified → pass
- [functional improvement] Dependency health: unverified → partial
- [functional improvement] Maintenance: unverified → pass
- [functional improvement] MCP protocol: unverified → pass
- [functional] Licence: MIT

### 2026-08-02 (score 36, +15)

- [security improvement] Malware scan: unverified → pass

### 2026-08-01 (score 21, −7)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-31 (score 28, −18)

- [security regression] Malware scan: pass → unverified

### 2026-07-27 (score 46)

First indexed and scored.

## MCP tools (4)

### `whois_lookup` (~78 tokens)

Retrieve WHOIS registration data for a domain name. Returns registrar details, creation/expiration dates, nameservers, contact information, DNSSEC status, and domain age analysis. Useful for checking domain ownership and registration info.

Input parameters:

- `domain` (string, required): Domain name to look up, e.g. "example.com". Do not include protocol or path.

### `dns_lookup` (~110 tokens)

Query DNS records for a domain name. Returns all available record types including A (IPv4), AAAA (IPv6), MX (mail), NS (nameservers), TXT, CNAME, SOA, CAA, DMARC, BIMI, MTA-STS, and TLS-RPT records. Useful for diagnosing DNS configuration, verifying mail settings, or auditing domain infrastructure.

Input parameters:

- `domain` (string, required): Domain name to query, e.g. "example.com". Do not include protocol or path.

### `ssl_check` (~90 tokens)

Retrieve and validate the SSL/TLS certificate details for a domain. Returns the issuer, validity period (valid_from / valid_to), whether the certificate is currently valid, fingerprints, subject alternative names, and full certificate details. Useful for checking certificate expiry, verifying the issuer, or auditing TLS configuration.

Input parameters:

- `domain` (string, required): The domain name to check the SSL certificate for (e.g. "example.com")

### `domain_availability` (~63 tokens)

Check whether a domain name is available for registration. Returns a boolean indicating if the domain is available. Useful for finding an unregistered domain before attempting to register it.

Input parameters:

- `domain` (string, required): The domain name to check availability for (e.g. "example.com")

## Diagnostics

Captured diagnostic sections: Provenance, Dependencies. The full working is on the page: https://verifymcp.io/servers/whoisjson-mcp-server/whoisjson-mcp-server#diagnostics

## Score history

- 2026-08-04: 70
- 2026-08-03: 65
- 2026-08-02: 36
- 2026-08-01: 21
- 2026-07-31: 28
- 2026-07-30: 46
- 2026-07-28: 46
- 2026-07-27: 46

## Links

- npm package: https://www.npmjs.com/package/@whoisjson/mcp-server
- Socket report: https://socket.dev/npm/package/@whoisjson/mcp-server
- Repository: https://github.com/Whoisjson/mcp-server
- Changelog RSS feed: https://verifymcp.io/servers/whoisjson-mcp-server/whoisjson-mcp-server/changelog.xml
- Changelog JSON feed: https://verifymcp.io/servers/whoisjson-mcp-server/whoisjson-mcp-server/changelog.json
- HTML version of this page: https://verifymcp.io/servers/whoisjson-mcp-server/whoisjson-mcp-server