# Web & domain tools (remote · fourzerotwo.si)

Read any public page as markdown, link previews, URL safety, page audits, domain availability and…

- Trust score: 84/100 (high trust)
- Change this week: +4
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-11-04

## Components

- remote · `fourzerotwo.si`: 84/100 (this document), [markdown](https://verifymcp.io/servers/si-fourzerotwo-web/mcp-v-web.md), [page](https://verifymcp.io/servers/si-fourzerotwo-web/mcp-v-web)

## Channel facts

- Endpoint: `https://fourzerotwo.si/mcp/v/web`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.0.1`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, 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 2026-11-04.

- **Endpoint Security**: 80/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one.
  - HTTPS is enforced; there's no plaintext access path.
  - The HSTS (Strict-Transport-Security) header is present.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 72/100
  - AI-judged instruction clarity (good).
  - Tool/resource definitions use about 1698 tokens (~67/item across 25 items; 25 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 77/100
  - Stability observed for 23 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.
  - Structured output schemas are declared (100% of tools); any adoption earns full credit.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 25 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 26 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### How do I install the Web & domain tools MCP server?

Web & domain tools is a hosted endpoint at https://fourzerotwo.si/mcp/v/web, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add --transport http si-fourzerotwo-web 'https://fourzerotwo.si/mcp/v/web'
```

### Cursor

```json
{
  "mcpServers": {
    "si-fourzerotwo-web": {
      "url": "https://fourzerotwo.si/mcp/v/web"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "si-fourzerotwo-web": {
      "type": "http",
      "url": "https://fourzerotwo.si/mcp/v/web"
    }
  }
}
```

### Codex

```toml
[mcp_servers.si-fourzerotwo-web]
url = "https://fourzerotwo.si/mcp/v/web"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "si-fourzerotwo-web": {
      "type": "remote",
      "url": "https://fourzerotwo.si/mcp/v/web",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add si-fourzerotwo-web --url 'https://fourzerotwo.si/mcp/v/web' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  si-fourzerotwo-web:
    url: "https://fourzerotwo.si/mcp/v/web"
```

### Netclaw

```json
{
  "McpServers": {
    "si-fourzerotwo-web": {
      "Transport": "http",
      "Url": "https://fourzerotwo.si/mcp/v/web"
    }
  }
}
```

### Vellum

```bash
assistant mcp add si-fourzerotwo-web -t streamable-http -u 'https://fourzerotwo.si/mcp/v/web'
```

### Other

```json
{
  "mcpServers": {
    "si-fourzerotwo-web": {
      "type": "http",
      "url": "https://fourzerotwo.si/mcp/v/web"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## 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.

### 2026-11-04 (score 84, +1)

No change was recorded against any check on this day. Stability & Change Management went from 73 to 77. That category is still filling its 30-day observation window: 22 days of observed history at the previous scan, 23 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-11-02 (score 83, +1)

No change was recorded against any check on this day. Stability & Change Management went from 67 to 70. That category is still filling its 30-day observation window: 20 days of observed history at the previous scan, 21 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-31 (score 82, +1)

No change was recorded against any check on this day. Stability & Change Management went from 60 to 63. That category is still filling its 30-day observation window: 18 days of observed history at the previous scan, 19 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-29 (score 81, +1)

No change was recorded against any check on this day. Stability & Change Management went from 53 to 57. That category is still filling its 30-day observation window: 16 days of observed history at the previous scan, 17 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-26 (score 80, +1)

No change was recorded against any check on this day. Stability & Change Management went from 43 to 47. That category is still filling its 30-day observation window: 13 days of observed history at the previous scan, 14 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-24 (score 79, +1)

No change was recorded against any check on this day. Stability & Change Management went from 37 to 40. That category is still filling its 30-day observation window: 11 days of observed history at the previous scan, 12 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-22 (score 78, +1)

No change was recorded against any check on this day. Stability & Change Management went from 30 to 33. That category is still filling its 30-day observation window: 9 days of observed history at the previous scan, 10 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-20 (score 77, +1)

No change was recorded against any check on this day. Stability & Change Management went from 23 to 27. That category is still filling its 30-day observation window: 7 days of observed history at the previous scan, 8 at this one. The score rises as the window fills, whether or not the server changes.

## MCP tools (25)

### `domains__availability` (~48 tokens)

Domains & DNS: Domain availability

Registered or available, straight from the TLD registry. A few free samples a day, then $0.002 USDC per call via x402.

Input parameters:

- `domain` (string, required): Domain

### `domains__facts` (~58 tokens)

Domains & DNS: Domain registration facts

Registrar, created, expiry, age, status codes, nameservers and DNSSEC. A few free samples a day, then $0.002 USDC per call via x402.

Input parameters:

- `domain` (string, required): Domain name (or URL)

### `domains__dns` (~88 tokens)

Domains & DNS: DNS records

A, AAAA, MX, NS, TXT, CNAME and CAA records (or one type). A few free samples a day, then $0.001 USDC per call via x402.

Input parameters:

- `domain` (string, required): Domain name (or URL)
- `type` (string): A, AAAA, MX, NS, TXT, CNAME, CAA or ALL

### `domains__ip-owner` (~63 tokens)

Domains & DNS: IP owner

Network, organisation, range, country and abuse email for an IP, from the regional internet registry. A few free samples a day, then $0.002 USDC per call via x402.

Input parameters:

- `ip` (string, required): IPv4 or IPv6 address

### `domains__dmca-agent` (~64 tokens)

Domains & DNS: DMCA agent

Published DMCA / abuse contact (email or form) for a major platform, host, CDN or registrar. A few free samples a day, then $0.002 USDC per call via x402.

Input parameters:

- `domain` (string, required): Platform domain or URL

### `domains__abuse-contacts` (~72 tokens)

Domains & DNS: Where to report a site

Everyone to send an abuse or takedown report to for a site: platform agent, hosting network (+ abuse email, CDN flag) and registrar. A few free samples a day, then $0.005 USDC per call via x402.

Input parameters:

- `domain` (string, required): Domain or URL

### `domains__email-auth` (~58 tokens)

Domains & DNS: Email authentication check

MX, SPF and DMARC for a domain, the mail provider, issues found and a grade. A few free samples a day, then $0.003 USDC per call via x402.

Input parameters:

- `domain` (string, required): Domain

### `domains__ideas` (~137 tokens)

Domains & DNS: Domain name ideas

Rule-based domain candidates for a keyword: exact, stopword-free, hyphenated, prefixed and suffixed, across chosen TLDs, with a trademark flag. Free within the daily allowance, then $0.002 USDC per call via x402.

Input parameters:

- `keyword` (string, required): Keyword or phrase
- `prefixes` (string): Comma list of prefixes
- `suffixes` (string): Comma list of suffixes
- `tlds` (string): Comma list of TLDs (default com,co.uk,io)
- `trademarks` (string): Comma list of brand names to flag

### `ip-geolocation__lookup` (~63 tokens)

IP Geolocation & ASN: IP lookup

Country, continent, EU membership, network block, ASN, organisation and hosting flag for one IP. Free within the daily allowance, then $0.001 USDC per call via x402.

Input parameters:

- `ip` (string, required): IPv4 or IPv6 address

### `ip-geolocation__country` (~51 tokens)

IP Geolocation & ASN: IP to country

Country and continent for one IP. Free within the daily allowance, then $0.0005 USDC per call via x402.

Input parameters:

- `ip` (string, required): IPv4 or IPv6 address

### `ip-geolocation__asn` (~54 tokens)

IP Geolocation & ASN: IP to network owner

ASN, organisation and hosting flag for one IP. Free within the daily allowance, then $0.0005 USDC per call via x402.

Input parameters:

- `ip` (string, required): IPv4 or IPv6 address

### `ip-geolocation__batch` (~60 tokens)

IP Geolocation & ASN: Batch lookup

Full lookup for up to 100 IPs in one call. A few free samples a day, then $0.02 USDC per call via x402.

Input parameters:

- `ips` (string, required): Comma-separated IPs (max 100)

### `seo__robots-check` (~80 tokens)

SEO Tools: robots.txt check

Whether a crawler (Googlebot, GPTBot, ClaudeBot…) may fetch a URL, the rule that decided it, and declared sitemaps. A few free samples a day, then $0.002 USDC per call via x402.

Input parameters:

- `url` (string, required): URL
- `user_agent` (string): Crawler user agent

### `seo__page-audit` (~75 tokens)

SEO Tools: On-page SEO audit

Title, meta, H1, canonical, noindex, hreflang, structured data, OG tags, word count, links, alt text, issues and a score. A few free samples a day, then $0.005 USDC per call via x402.

Input parameters:

- `url` (string, required): Page URL

### `seo__links` (~53 tokens)

SEO Tools: Extract links

Internal and external links on a page with anchor text and nofollow flags. A few free samples a day, then $0.003 USDC per call via x402.

Input parameters:

- `url` (string, required): Page URL

### `seo__keyword-intent` (~55 tokens)

SEO Tools: Keyword intent

Classify a search keyword as transactional, commercial, navigational or informational. A few free samples a day, then $0.0005 USDC per call via x402.

Input parameters:

- `keyword` (string, required): Keyword

### `validators__imei` (~58 tokens)

Validators: IMEI check digit

Validate an IMEI (length + Luhn) and split TAC, serial and check digit. Free within the daily allowance, then $0.0005 USDC per call via x402.

Input parameters:

- `imei` (string, required): IMEI

### `validators__vin` (~50 tokens)

Validators: VIN check

VIN format, check digit, WMI and model-year candidates. Free within the daily allowance, then $0.0005 USDC per call via x402.

Input parameters:

- `vin` (string, required): VIN

### `validators__iban` (~53 tokens)

Validators: IBAN check

IBAN mod-97 checksum and country length; UK sort code extracted. Free within the daily allowance, then $0.0005 USDC per call via x402.

Input parameters:

- `iban` (string, required): IBAN

### `validators__uk-phone` (~62 tokens)

Validators: UK phone number

Classify a UK number (mobile, landline, freephone, premium…) and format as E.164. Free within the daily allowance, then $0.0005 USDC per call via x402.

Input parameters:

- `number` (string, required): Phone number

### `validators__uk-postcode` (~54 tokens)

Validators: UK postcode format

Validate and normalise UK postcode format; split outward/inward codes. Free within the daily allowance, then $0.0005 USDC per call via x402.

Input parameters:

- `postcode` (string, required): Postcode

### `validators__email` (~51 tokens)

Validators: Email check

Email syntax, whether the domain accepts mail, disposable and role-account flags. Free within the daily allowance, then $0.001 USDC per call via x402.

Input parameters:

- `email` (string, required): Email

### `web__read` (~71 tokens)

Web Reader: Read a page as markdown

Main content of a public web page as clean markdown, with title, byline, published date, canonical URL, language, word count and links. A few free samples a day, then $0.003 USDC per call via x402.

Input parameters:

- `url` (string, required): Public http(s) URL

### `web__unfurl` (~71 tokens)

Web Reader: Link preview (unfurl)

Open Graph and Twitter card data, favicon, theme colour, JSON-LD types, RSS/Atom feeds and sitemaps for a URL. Free within the daily allowance, then $0.002 USDC per call via x402.

Input parameters:

- `url` (string, required): Public http(s) URL

### `web__url-safety` (~79 tokens)

Web Reader: URL safety check

Warning signs for a URL: redirect chain and final destination, TLS certificate, domain age, punycode and brand-lookalike tricks, bare IPs, and security-header grade. Free within the daily allowance, then $0.003 USDC per call via x402.

Input parameters:

- `url` (string, required): Public http(s) URL

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/si-fourzerotwo-web/mcp-v-web#diagnostics

## Score history

- 2026-11-04: 84
- 2026-11-03: 83
- 2026-11-02: 83
- 2026-11-01: 82
- 2026-10-31: 82
- 2026-10-30: 81
- 2026-10-29: 81
- 2026-10-28: 80
- 2026-10-27: 80
- 2026-10-26: 80
- 2026-10-25: 79
- 2026-10-24: 79
- 2026-10-23: 78
- 2026-10-22: 78
- 2026-10-21: 77
- 2026-10-20: 77
- 2026-10-19: 76
- 2026-10-18: 76
- 2026-10-17: 75
- 2026-10-16: 75
- 2026-10-15: 74
- 2026-10-14: 74
- 2026-10-13: 73
- 2026-10-12: 73

## Common questions

### What is the Web & domain tools MCP server?

Web & domain tools is an MCP server listed in the public MCP registry as si.fourzerotwo/web. Read any public page as markdown, link previews, URL safety, page audits, domain availability and… This page covers its hosted endpoint (https://fourzerotwo.si/mcp/v/web).

### Is the Web & domain tools MCP server safe to use?

Web & domain tools scores 84 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

### What tools does the Web & domain tools MCP server expose?

Web & domain tools exposes 25 tools: domains__availability, domains__facts, domains__dns, domains__ip-owner, domains__dmca-agent, and 20 more. Their descriptions and schemas cost roughly 1,628 tokens of context every time the server is loaded.

### Does the Web & domain tools MCP server require authentication?

No. We connected to Web & domain tools without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the Web & domain tools MCP server still maintained?

Web & domain tools is still listed as active in the MCP registry. We last reached this channel on 4 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

## Links

- Remote endpoint: https://fourzerotwo.si/mcp/v/web
- Website: https://fourzerotwo.si/
- Changelog RSS feed: https://verifymcp.io/servers/si-fourzerotwo-web/mcp-v-web.xml
- Changelog JSON feed: https://verifymcp.io/servers/si-fourzerotwo-web/mcp-v-web.json
- HTML version of this page: https://verifymcp.io/servers/si-fourzerotwo-web/mcp-v-web