Northline WebKit

dev.workers.northline-c86.northline-webkit/webkitnorthline-webkit.northline-c86.workers.devstreamable-httpv1.0.0Scanned 1 hour ago

Pay-per-call web tools for agents: URL to markdown, metadata, links, DNS, email/domain checks, RDAP.

10 tools: 8 change things and 2 only read.

Reads private data · 0
Reads text others write · 9
Can send data out · 5
2 findings

Anlyon alternative

8 of these tools change something. Run those as governed actions.

Declare what an action changes, and Anlyon puts it under a shared limit, binds every approval to the exact request, and grades the outcome. It works on any HTTPS API you can describe as an action.

Anlyon does not run, proxy or govern this MCP server. A tool your own code calls directly is not routed through Anlyon and is not governed by it.

Import an OpenAPI spec →

Tools

Grouped by what each tool does, most consequential first. Open one for its reasons and full description; descriptions are the publisher's own words.

10 tools

Changes things 8Creates or changes something that can be changed back.Claude Code: ask

domain_reportOne-call domain due diligence: RDAP registration (age, registrar, expiry), DNS (A/AAAA/NS/CAA, DNSSEC), email setup (MX/SPF/DMARC), HTTPS reachability with security-headers grade, …Reads text others writeNo findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Description, as the server wrote it
One-call domain due diligence: RDAP registration (age, registrar, expiry), DNS (A/AAAA/NS/CAA, DNSSEC), email setup (MX/SPF/DMARC), HTTPS reachability with security-headers grade, and risk flags such as newly_registered_lt_30d. Costs $0.005 USDC on Base per call via x402 (unpaid calls return the x402 PaymentRequired; any x402 MCP client pays automatically).
Annotations the server declares
- readOnlyHint: true
- openWorldHint: true
domain_whoisWHOIS for a domain via official RDAP: registered?, registrar, creation/expiry dates, domain age in days, status codes, nameservers, DNSSEC and abuse contact.Reads text others writeNo findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Description, as the server wrote it
WHOIS for a domain via official RDAP: registered?, registrar, creation/expiry dates, domain age in days, status codes, nameservers, DNSSEC and abuse contact. Spot newly registered (phishing) domains. Costs $0.002 USDC on Base per call via x402 (unpaid calls return the x402 PaymentRequired; any x402 MCP client pays automatically).
Annotations the server declares
- readOnlyHint: true
- openWorldHint: true
email_domain_checkCheck an email address or domain before you send: syntax, MX servers, accepts mail?, disposable or free provider, mail provider (Google, Microsoft...), SPF and DMARC policy, with r…Reads text others writeNo findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Description, as the server wrote it
Check an email address or domain before you send: syntax, MX servers, accepts mail?, disposable or free provider, mail provider (Google, Microsoft...), SPF and DMARC policy, with risk flags. Costs $0.002 USDC on Base per call via x402 (unpaid calls return the x402 PaymentRequired; any x402 MCP client pays automatically).
Annotations the server declares
- readOnlyHint: true
- openWorldHint: true
robots_checkMay I crawl this URL?Reads text others writeCan send data outNo findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
- untrusted-inputThe description's first sentence says "crawl": it reads web pages, which anyone can write.
- outboundThe input takes a URL (input.url): a request to a URL can carry data to whoever runs it.
Description, as the server wrote it
May I crawl this URL? Parses robots.txt and answers allowed true/false for your user agent and path, the matching rule, sitemaps, and whether 14 AI crawlers (GPTBot, ClaudeBot, PerplexityBot...) are allowed. Costs $0.001 USDC on Base per call via x402 (unpaid calls return the x402 PaymentRequired; any x402 MCP client pays automatically).
Annotations the server declares
- readOnlyHint: true
- openWorldHint: true
url_checkIs this URL up?Reads text others writeCan send data outNo findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
- outboundThe input takes a URL (input.url): a request to a URL can carry data to whoever runs it.
Description, as the server wrote it
Is this URL up? HTTP status, full redirect chain, final URL, response time, content type, server/CDN and a security-headers grade (HSTS, CSP, X-Frame-Options...). Costs $0.001 USDC on Base per call via x402 (unpaid calls return the x402 PaymentRequired; any x402 MCP client pays automatically).
Annotations the server declares
- readOnlyHint: true
- openWorldHint: true
url_linksEvery unique outgoing link on a web page (absolute URLs, anchor text, internal vs external), up to 500.Reads text others writeCan send data out1 finding
Why it is in this group
- The name "url_links" says "link": a word for a change.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
- outboundThe input takes a URL (input.url): a request to a URL can carry data to whoever runs it.
Findings
- Warn
  The server marks "url_links" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
  Matched text
  annotations: {"readOnlyHint":true,"openWorldHint":true}; The name "url_links" says "link": a word for a change.
  What this check looks for
Description, as the server wrote it
Every unique outgoing link on a web page (absolute URLs, anchor text, internal vs external), up to 500. Use it to crawl a site or find related pages. Costs $0.002 USDC on Base per call via x402 (unpaid calls return the x402 PaymentRequired; any x402 MCP client pays automatically).
Annotations the server declares
- readOnlyHint: true
- openWorldHint: true
url_metadataLink preview and SEO metadata for any URL: title, description, canonical, language, Open Graph and Twitter card, favicon, RSS/Atom feeds and JSON-LD types, after following redirect…Reads text others writeCan send data out1 finding
Why it is in this group
- The description's first verb is "link": a word for a change.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
- outboundThe input takes a URL (input.url): a request to a URL can carry data to whoever runs it.
Findings
- Warn
  The server marks "url_metadata" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
  Matched text
  annotations: {"readOnlyHint":true,"openWorldHint":true}; The description's first verb is "link": a word for a change.
  What this check looks for
Description, as the server wrote it
Link preview and SEO metadata for any URL: title, description, canonical, language, Open Graph and Twitter card, favicon, RSS/Atom feeds and JSON-LD types, after following redirects. Costs $0.002 USDC on Base per call via x402 (unpaid calls return the x402 PaymentRequired; any x402 MCP client pays automatically).
Annotations the server declares
- readOnlyHint: true
- openWorldHint: true
webkit_catalogFree.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Description, as the server wrote it
Free. Lists every WebKit tool with its price, required inputs and an example, plus how x402 payment works. Call this first.
Annotations the server declares
- readOnlyHint: true
- openWorldHint: false

Only reads 2Looks things up and changes nothing.Show 2 read-only tools

dns_lookupDNS records for a domain over DNS-over-HTTPS: A, AAAA, CNAME, MX, TXT, NS, SOA, CAA, SRV, PTR or HTTPS, with TTLs and DNSSEC validation flag.Reads text others writeNo findings
Why it is in this group
- The name "dns_lookup" says "lookup": a word for reading.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
- untrusted-inputThe description's first sentence says "http": it reads web pages, which anyone can write.
Description, as the server wrote it
DNS records for a domain over DNS-over-HTTPS: A, AAAA, CNAME, MX, TXT, NS, SOA, CAA, SRV, PTR or HTTPS, with TTLs and DNSSEC validation flag. Costs $0.001 USDC on Base per call via x402 (unpaid calls return the x402 PaymentRequired; any x402 MCP client pays automatically).
Annotations the server declares
- readOnlyHint: true
- openWorldHint: true
url_to_markdownFetch any public web page and return clean, readable Markdown (main content only: no scripts, nav or footer) plus title, word count and final URL.Reads text others writeCan send data outNo findings
Why it is in this group
- The description's first verb is "fetch": a word for reading.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
- untrusted-inputThe name "url_to_markdown" says "url": it reads web pages, which anyone can write.
- untrusted-inputThe description's first sentence says "fetch" and "web": it reads web pages, which anyone can write.
- untrusted-inputThe input takes a URL (input.url), and the tool reads it: it reads web pages, which anyone can write.
- outboundThe input takes a URL (input.url): a request to a URL can carry data to whoever runs it.
Claude Code: ask, because it is tagged outbound.
Description, as the server wrote it
Fetch any public web page and return clean, readable Markdown (main content only: no scripts, nav or footer) plus title, word count and final URL. Ideal for feeding pages to an LLM. Costs $0.003 USDC on Base per call via x402 (unpaid calls return the x402 PaymentRequired; any x402 MCP client pays automatically).
Annotations the server declares
- readOnlyHint: true
- openWorldHint: true

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Exfil surface

Which tools read private data, which read text someone else can write, and which can send data out. One of each is a path a prompt injection can use.

No private-data, untrusted-input, outbound path in this server alone: no tool is tagged private-data.

Reads private data0: Reads files, mail, messages, databases, secrets, calendars or repositories.
Reads text others write9: Brings in text someone else can write: web pages, inbound email, messages, issues and comments.; dns_lookup
domain_report
domain_whois
email_domain_check
robots_check
url_check
url_links
url_metadata
url_to_markdown
Can send data out5: Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL.; robots_check
url_check
url_links
url_metadata
url_to_markdown

Other servers in the same agent add their own tools to these paths. Audit your whole setup to see them together.

Findings

Matches of fixed checks, with the text they matched.

2 warn

Warnurl_metadata
The server marks "url_metadata" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
Matched text
annotations: {"readOnlyHint":true,"openWorldHint":true}; The description's first verb is "link": a word for a change.
What this check looks for
Warnurl_links
The server marks "url_links" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
Matched text
annotations: {"readOnlyHint":true,"openWorldHint":true}; The name "url_links" says "link": a word for a change.
What this check looks for

History

Changes to its tool definitions and to its remote endpoint, newest first.

No change seen yet. Its tools are rescanned every day, and a remote endpoint is looked at once a week.

All changes to this server

Install

Pinned to version 1.0.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http webkit https://northline-webkit.northline-c86.workers.dev/mcp

claude mcp add --transport http webkit https://northline-webkit.northline-c86.workers.dev/mcp

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change or a way out, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json

{
  "permissions": {
    "allow": [
      "mcp__webkit__dns_lookup"
    ],
    "ask": [
      "mcp__webkit__webkit_catalog",
      "mcp__webkit__url_to_markdown",
      "mcp__webkit__url_metadata",
      "mcp__webkit__url_links",
      "mcp__webkit__url_check",
      "mcp__webkit__email_domain_check",
      "mcp__webkit__domain_whois",
      "mcp__webkit__robots_check",
      "mcp__webkit__domain_report"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. A read that can send data out (it takes a URL, say) asks first too. It assumes the server is installed as webkit. Review it before you use it.

Capability tags behind 9 rules

mcp__webkit__url_to_markdown untrusted-input, outbound
mcp__webkit__url_metadata untrusted-input, outbound
mcp__webkit__url_links untrusted-input, outbound
mcp__webkit__url_check untrusted-input, outbound
mcp__webkit__dns_lookup untrusted-input
mcp__webkit__email_domain_check untrusted-input
mcp__webkit__domain_whois untrusted-input
mcp__webkit__robots_check untrusted-input, outbound
mcp__webkit__domain_report untrusted-input

Keep the decision: fail CI when the tools change, follow every change, or show a badge.

Pin in CI

Fail a build when the tools you reviewed are not the tools the server serves today.

curl -s "https://anlyon.dev/api/v1/servers/dev.workers.northline-c86.northline-webkit/webkit/verify?hash=0b38a0920cba9fb5bd32d3247e973d5900196aa2b35c1e9f6fa7549fc8768f5a" | jq -e '.changed == false'

Pinned hash 0b38a0920cba, from Oct 30, 2026, 13:18 UTC.

Watch

Get told when its tools change: a new tool, a new description, a new class.

https://anlyon.dev/servers/dev.workers.northline-c86.northline-webkit/webkit/changes.xml

An Atom feed. Works in any feed reader or Slack's RSS app.

Badge

[![anlyon.dev](https://anlyon.dev/badge/dev.workers.northline-c86.northline-webkit/webkit.svg)](https://anlyon.dev/servers/dev.workers.northline-c86.northline-webkit/webkit)

Source: MCP Registry. Synced Oct 30, 2026, 13:17 UTC.