# Services from northline-webkit.northline-c86.workers.dev on Zero

> northline-webkit.northline-c86.workers.dev serves 9 paid API services for AI agents, indexed by Zero. Each is callable per call with payment handled by Zero.

Canonical page: https://www.zero.xyz/host/northline-webkit.northline-c86.workers.dev
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/northline-webkit.northline-c86.workers.dev/health.json

## Services

- [Northline WebKit – URL Link Extractor](https://www.zero.xyz/c/northline-webkit-url-link-extractor-093d43ed/llms.txt): $0.002/call via x402. Extracts all hyperlinks from a public webpage, returning each link's URL, anchor text, and whether it is internal or external.
- [Northline WebKit – URL to Markdown](https://www.zero.xyz/c/northline-webkit-url-to-markdown-799c3120/llms.txt): $0.003/call via x402. Fetches a public URL and returns its content converted to clean Markdown text, with title and word count.
- [Northline WebKit – URL Metadata (Link Preview)](https://www.zero.xyz/c/northline-webkit-url-metadata-link-preview-3743a3ad/llms.txt): $0.002/call via x402. Fetches link preview metadata for a given URL, including title, favicon, Open Graph image, and final (post-redirect) URL.
- [Northline WebKit – WHOIS/RDAP Domain Lookup](https://www.zero.xyz/c/northline-webkit-whois-rdap-domain-lookup-61490f76/llms.txt): $0.002/call via x402. Returns WHOIS/RDAP registration data for a domain, including creation date, registrar, age, and registration status.
- [Northline WebKit Email Domain Check](https://www.zero.xyz/c/northline-webkit-email-domain-check-4d885065/llms.txt): $0.002/call via x402. Checks an email address or domain for deliverability, provider type (free/disposable), DMARC policy, and mail provider identity
- [Northline WebKit – Domain Report](https://www.zero.xyz/c/northline-webkit-domain-report-8918a067/llms.txt): $0.005/call via x402. Returns a comprehensive one-call domain report including HTTPS status, security headers grade, WHOIS/registration age, DNS, uptime, and risk flags for a given domain.
- [Northline WebKit – URL Uptime & Redirect Check](https://www.zero.xyz/c/northline-webkit-url-uptime-redirect-check-7f0fd8c5/llms.txt): $0.001/call via x402. Checks whether a public URL is reachable, follows its redirect chain, measures response time, and grades its security headers.
- [Northline WebKit DNS Lookup](https://www.zero.xyz/c/northline-webkit-dns-lookup-b2855de8/llms.txt): $0.001/call via x402. Performs DNS record lookups for a given domain, returning resolved records of the specified type (A, MX, TXT, CNAME, etc.)
- [Northline WebKit – robots.txt Check](https://www.zero.xyz/c/northline-webkit-robots-txt-check-3b1e1de9/llms.txt): $0.001/call via x402. Fetches and parses a URL's robots.txt to determine crawl permissions for any user-agent, including known AI crawlers like GPTBot and ClaudeBot.

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

- [Zero catalog index](https://www.zero.xyz/llms.txt)