Web & domain tools
REMOTE · FOURZEROTWO.SI
Read any public page as markdown, link previews, URL safety, page audits, domain availability and…
Available components
Last scanned (19 hours ago)
Scores higher than 89% of remote servers
Reachable. Last reached 4 Nov 2026.
Category Search and Retrieval
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. How we score → Why this is hard to score →
Endpoint Security80
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one. See how to fix → View diagnostics → Partial
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- The HSTS (Strict-Transport-Security) header is present. View diagnostics → Pass
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability72
- AI-judged instruction clarity (good).Pass
- Tool/resource definitions use about 1698 tokens (~67/item across 25 items; 25 tools + 0 resources), lean.Pass
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management77
- Stability observed for 23 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage100
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 100% of tool parameters carry a description.Pass
- Structured output schemas are declared (100% of tools); any adoption earns full credit.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 25 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 26 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 4 Nov 26 +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.
- 2 Nov 26 +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.
- 31 Oct 26 +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.
- 29 Oct 26 +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.
- 26 Oct 26 +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.
- 24 Oct 26 +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.
- 22 Oct 26 +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.
- 20 Oct 26 +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.
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 4 Nov 2026 · Probed https://fourzerotwo.si/mcp/v/web
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=fourzerotwo.si | CN=WE1,O=Google Trust Services,C=US | 10 Oct 2026 | 8 Jan 2027 | ECDSA 256 | ECDSA-SHA256 | 7083f50b7ee269bb0ef93ba441295bdf |
| SANs: fourzerotwo.si | ||||||
| CN=WE1,O=Google Trust Services,C=US (CA) | CN=GTS Root R4,O=Google Trust Services LLC,C=US | 13 Dec 2023 | 20 Feb 2029 | ECDSA 256 | ECDSA-SHA384 | 7ff31977972c224a76155d13b6d685e3 |
| CN=GTS Root R4,O=Google Trust Services LLC,C=US (CA) | CN=GlobalSign Root CA,OU=Root CA,O=GlobalSign nv-sa,C=BE | 15 Nov 2023 | 28 Jan 2028 | ECDSA 384 | SHA256-RSA | 7fe530bf331343bedd821610493d8a1b |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of fourzerotwo.si. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| si. | present | 42378 | 13 | Verified |
| fourzerotwo.si. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication No authorisation required
The endpoint answered without asking for a token. Anyone who knows the URL can reach it.
| Result | No authorisation required |
|---|---|
| HTTP status | 200 |
| Header | Value |
|---|---|
| strict-transport-security | max-age=31536000; includeSubDomains |
| x-content-type-options | nosniff |
| x-frame-options | deny |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://fourzerotwo.si/mcp/v/web | Verified | 200 | |
| http (plaintext) | http://fourzerotwo.si/mcp/v/web | HTTPS enforced | 301 | https://fourzerotwo.si/mcp/v/web |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
domains__abuse-contacts Domains & DNS: Where to report a site ~72
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.
| Name | Type | Req | Description |
|---|---|---|---|
| domain | string | yes | Domain or URL |
Structured output declared, but exposes no named fields.
No examples provided.
domains__availability Domains & DNS: Domain availability ~48
Registered or available, straight from the TLD registry. A few free samples a day, then $0.002 USDC per call via x402.
| Name | Type | Req | Description |
|---|---|---|---|
| domain | string | yes | Domain |
Structured output declared, but exposes no named fields.
No examples provided.
domains__dmca-agent Domains & DNS: DMCA agent ~64
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.
| Name | Type | Req | Description |
|---|---|---|---|
| domain | string | yes | Platform domain or URL |
Structured output declared, but exposes no named fields.
No examples provided.
domains__dns Domains & DNS: DNS records ~88
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.
| Name | Type | Req | Description |
|---|---|---|---|
| domain | string | yes | Domain name (or URL) |
| type | string | – | A, AAAA, MX, NS, TXT, CNAME, CAA or ALL |
Structured output declared, but exposes no named fields.
No examples provided.
domains__email-auth Domains & DNS: Email authentication check ~58
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.
| Name | Type | Req | Description |
|---|---|---|---|
| domain | string | yes | Domain |
Structured output declared, but exposes no named fields.
No examples provided.
domains__facts Domains & DNS: Domain registration facts ~58
Registrar, created, expiry, age, status codes, nameservers and DNSSEC. A few free samples a day, then $0.002 USDC per call via x402.
| Name | Type | Req | Description |
|---|---|---|---|
| domain | string | yes | Domain name (or URL) |
Structured output declared, but exposes no named fields.
No examples provided.
domains__ideas Domains & DNS: Domain name ideas ~137
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.
| Name | Type | Req | Description |
|---|---|---|---|
| keyword | string | yes | 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 |
Structured output declared, but exposes no named fields.
No examples provided.
domains__ip-owner Domains & DNS: IP owner ~63
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.
| Name | Type | Req | Description |
|---|---|---|---|
| ip | string | yes | IPv4 or IPv6 address |
Structured output declared, but exposes no named fields.
No examples provided.
ip-geolocation__asn IP Geolocation & ASN: IP to network owner ~54
ASN, organisation and hosting flag for one IP. Free within the daily allowance, then $0.0005 USDC per call via x402.
| Name | Type | Req | Description |
|---|---|---|---|
| ip | string | yes | IPv4 or IPv6 address |
Structured output declared, but exposes no named fields.
No examples provided.
ip-geolocation__batch IP Geolocation & ASN: Batch lookup ~60
Full lookup for up to 100 IPs in one call. A few free samples a day, then $0.02 USDC per call via x402.
| Name | Type | Req | Description |
|---|---|---|---|
| ips | string | yes | Comma-separated IPs (max 100) |
Structured output declared, but exposes no named fields.
No examples provided.
ip-geolocation__country IP Geolocation & ASN: IP to country ~51
Country and continent for one IP. Free within the daily allowance, then $0.0005 USDC per call via x402.
| Name | Type | Req | Description |
|---|---|---|---|
| ip | string | yes | IPv4 or IPv6 address |
Structured output declared, but exposes no named fields.
No examples provided.
ip-geolocation__lookup IP Geolocation & ASN: IP lookup ~63
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.
| Name | Type | Req | Description |
|---|---|---|---|
| ip | string | yes | IPv4 or IPv6 address |
Structured output declared, but exposes no named fields.
No examples provided.
seo__keyword-intent SEO Tools: Keyword intent ~55
Classify a search keyword as transactional, commercial, navigational or informational. A few free samples a day, then $0.0005 USDC per call via x402.
| Name | Type | Req | Description |
|---|---|---|---|
| keyword | string | yes | Keyword |
Structured output declared, but exposes no named fields.
No examples provided.
seo__links SEO Tools: Extract links ~53
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.
| Name | Type | Req | Description |
|---|---|---|---|
| url | string | yes | Page URL |
Structured output declared, but exposes no named fields.
No examples provided.
seo__page-audit SEO Tools: On-page SEO audit ~75
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.
| Name | Type | Req | Description |
|---|---|---|---|
| url | string | yes | Page URL |
Structured output declared, but exposes no named fields.
No examples provided.
seo__robots-check SEO Tools: robots.txt check ~80
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.
| Name | Type | Req | Description |
|---|---|---|---|
| url | string | yes | URL |
| user_agent | string | – | Crawler user agent |
Structured output declared, but exposes no named fields.
No examples provided.
validators__email Validators: Email check ~51
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.
| Name | Type | Req | Description |
|---|---|---|---|
| string | yes |
Structured output declared, but exposes no named fields.
No examples provided.
validators__iban Validators: IBAN check ~53
IBAN mod-97 checksum and country length; UK sort code extracted. Free within the daily allowance, then $0.0005 USDC per call via x402.
| Name | Type | Req | Description |
|---|---|---|---|
| iban | string | yes | IBAN |
Structured output declared, but exposes no named fields.
No examples provided.
validators__imei Validators: IMEI check digit ~58
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.
| Name | Type | Req | Description |
|---|---|---|---|
| imei | string | yes | IMEI |
Structured output declared, but exposes no named fields.
No examples provided.
validators__uk-phone Validators: UK phone number ~62
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.
| Name | Type | Req | Description |
|---|---|---|---|
| number | string | yes | Phone number |
Structured output declared, but exposes no named fields.
No examples provided.
validators__uk-postcode Validators: UK postcode format ~54
Validate and normalise UK postcode format; split outward/inward codes. Free within the daily allowance, then $0.0005 USDC per call via x402.
| Name | Type | Req | Description |
|---|---|---|---|
| postcode | string | yes | Postcode |
Structured output declared, but exposes no named fields.
No examples provided.
validators__vin Validators: VIN check ~50
VIN format, check digit, WMI and model-year candidates. Free within the daily allowance, then $0.0005 USDC per call via x402.
| Name | Type | Req | Description |
|---|---|---|---|
| vin | string | yes | VIN |
Structured output declared, but exposes no named fields.
No examples provided.
web__read Web Reader: Read a page as markdown ~71
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.
| Name | Type | Req | Description |
|---|---|---|---|
| url | string | yes | Public http(s) URL |
Structured output declared, but exposes no named fields.
No examples provided.
web__unfurl Web Reader: Link preview (unfurl) ~71
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.
| Name | Type | Req | Description |
|---|---|---|---|
| url | string | yes | Public http(s) URL |
Structured output declared, but exposes no named fields.
No examples provided.
web__url-safety Web Reader: URL safety check ~79
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.
| Name | Type | Req | Description |
|---|---|---|---|
| url | string | yes | Public http(s) URL |
Structured output declared, but exposes no named fields.
No examples provided.
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.
remote · fourzerotwo.si
claude mcp add --transport http si-fourzerotwo-web 'https://fourzerotwo.si/mcp/v/web'
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.