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Joost de Valk
founderInternet entrepreneur. Group Head of AI & Growth at Your.Online, founder of @Yoast, investor via @Emilia-Capital.
Public projects
specification.website
Website specification — HTML, accessibility, security, SEO, agent-readiness. Platform-agnostic, sourced, MIT.
TypeScriptaccessibilityagent-readinessastro
skills
Agent skills for GitHub repos and profiles, WordPress and EmDash plugins, Astro SEO, and content readability.
Pythonastro
claudeemdash
seo-graph
Agent-ready SEO for JavaScript — schema.org JSON-LD graph builder with an Astro integration.
TypeScriptagent-readyastroastro-integration
ask-endpoint
AI-powered /ask endpoint for static sites on Cloudflare Pages. Hybrid search + LLM answers via Workers AI. NLWeb-compatible.
JavaScriptaicloudflare-pagescloudflare-workers
cocktail.glass
500 cocktail recipes as an Astro site — and an agent-ready MCP server, no API key.
JavaScriptastrocloudflare-pagescocktail-recipes
web-fetch-mcp
Fetch any URL as clean Markdown — content negotiation first, headless browser fallback via Obscura
TypeScriptbunclaudeheadless-browser
