Northline WebKit

dev.workers.northline-c86.northline-webkitPublished by northline-webkit.northline-c86.workers.devOfficial publisherv1.0.0Updated Oct 30, 2026

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

VerifiedStreamable HTTPWeb executableWeb Search & ScrapingSecurity & Monitoring

Overview

AI-generated overview

Paid web and domain utility tools for agents: page-to-Markdown, metadata, links, URL status, DNS, email-domain, RDAP and robots.txt checks.

What you can do
  • Fetch a public page as clean Markdown with title, word count and final URL
  • Read link preview and SEO metadata, and list a page's outgoing links
  • Check URL status, redirect chain, response time and security-header grade
  • Look up DNS records over DNS-over-HTTPS and WHOIS/RDAP registration data
  • Check email addresses or domains for MX, SPF, DMARC and risk flags
  • Parse robots.txt for crawl permission and AI crawler rules, or run a combined domain report
When to use it
Useful when an assistant needs to read web pages as Markdown, gather link or SEO metadata, or vet a domain or email sender before crawling, contacting or trusting it. The free catalog tool lets you check prices before paying.
Requirements
Remote streamable HTTP endpoint; no account, API key or headers declared. Each paid call costs $0.001 to $0.005 USDC on Base via x402, so the client needs a wallet or x402-capable payment setup. Network access to the endpoint and to the target sites.
Before you install
Every tool except the catalog is paid per call in USDC on Base, so an x402-capable client may spend funds automatically; check prices with the free catalog first. Requested URLs and domains are sent to a third-party service. Tools are read-only lookups and do not modify data.

Installation

In SourceWeft

  1. Open Northline WebKit in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/dev.workers.northline-c86.northline-webkit%2Fwebkit/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "northline-webkit": {
      "type": "http",
      "url": "https://northline-webkit.northline-c86.workers.dev/mcp"
    }
  }
}

Tools

10

webkit_catalog

WebKit catalog (free)

Free. Lists every WebKit tool with its price, required inputs and an example, plus how x402 payment works. Call this first.

Takes no parameters.

url_to_markdown

/v1/url/markdown

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).

ParametersurlrequiredmaxChars

url_metadata

/v1/url/metadata

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).

Parametersurlrequired

url_check

/v1/url/check

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).

Parametersurlrequired

dns_lookup

/v1/dns/lookup

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).

Parameterstypedomainrequired

email_domain_check

/v1/email/check

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).

Parametersemailrequired

domain_whois

/v1/domain/whois

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).

Parametersdomainrequired

robots_check

/v1/robots/check

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).

ParametersurlrequireduserAgent

domain_report

/v1/domain/report

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).

Parametersdomainrequired

Version history

1
  1. v1.0.0LatestOct 30, 2026

Score

72% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listedRequired15 pts
  • DescriptionRequired15 pts
  • Logo10 pts

    Publish an icon in the registry entry.

  • Documentation15 pts

    Declare a GitHub repository with a README, or serve resource_documentation in the OAuth protected-resource metadata.

  • LicenseNot applicable

    A hosted service is used under its provider's terms, so no license is expected here. This check is left out of the percentage.