{"mcp":"streamable-http","endpoint":"https://northline-webkit.northline-c86.workers.dev/mcp","transport":"POST JSON-RPC 2.0","tools":["webkit_catalog","url_to_markdown","url_metadata","url_links","url_check","dns_lookup","email_domain_check","domain_whois","robots_check","domain_report"],"payment":"x402 MCP transport (USDC on Base)"}