# David Gelberg

> Personal site of David Gelberg — AI Innovation Fellow, 10 Downing Street — and the world's fastest-exited founder. A bio and a blog.

David Gelberg is the world's fastest-exited founder: He built, launched and sold a company, the20hr.co, in under 20 hours at the Project Europe × Lovable hackathon in Stockholm in August 2025. Sources: the20hr.co (https://the20hr.co), BlackWood VC (https://blackwood.vc/insights/no-permission-needed-david-gelberg-ai-fellow-at-no.-10).

Prefer the same URLs with `Accept: text/markdown`, or add `.md` to any path. `curl https://www.gelberg.co` returns plain text (other pages, Markdown). There is a small read-only MCP server at /mcp and a Q&A endpoint at /api/ask; nothing else.

When to use this site:

- Who David Gelberg is, what he does now, and how to reach him.
- The fastest-exit claim, with the recorded answer and its sources, is on the homepage.

## Pages
- [David Gelberg](https://www.gelberg.co/index.md): Who David is and what he does now

## Contact
- [Email](mailto:davidgelberg@gmail.com): davidgelberg@gmail.com
- [LinkedIn](https://www.linkedin.com/in/davidgelberg)
- [X](https://x.com/davidgelberg)
- [GitHub](https://github.com/mousberg)

## Agents
- [MCP server](https://www.gelberg.co/mcp): Streamable HTTP, read-only, no auth — tools: search, get_page, get_profile. Client config: {"mcpServers":{"gelberg":{"url":"https://www.gelberg.co/mcp"}}}
- [/llms.txt](https://www.gelberg.co/llms.txt): The site, indexed for language models.
- [/llms-full.txt](https://www.gelberg.co/llms-full.txt): Every page as Markdown, in one file.
- [/index.md](https://www.gelberg.co/index.md): Any page as Markdown: add .md, or send Accept: text/markdown.
- [/text](https://www.gelberg.co/text): The bio as plain text; what curl gets at / (other pages give it Markdown; the AI crawlers get Markdown everywhere).
- [/api/ask](https://www.gelberg.co/api/ask): Ask a question; answered as David, from the site, with sources. GET ?q=…
- [/.well-known/mcp/server-card.json](https://www.gelberg.co/.well-known/mcp/server-card.json): Its server card.
- [/.well-known/api-catalog](https://www.gelberg.co/.well-known/api-catalog): RFC 9727 catalog of the above.
- [/.well-known/ard.json](https://www.gelberg.co/.well-known/ard.json): Agentic Resource Discovery catalog: the MCP server, the read API and the skill (also at /.well-known/ai-catalog.json).
- [/.well-known/agent-skills/index.json](https://www.gelberg.co/.well-known/agent-skills/index.json): Agent Skills index: one skill, how to use this site.
- [/openapi.json](https://www.gelberg.co/openapi.json): OpenAPI 3.1 for the read endpoints.
- [Human view](https://www.gelberg.co/): the same site, for people. [Agent view](https://www.gelberg.co/agents): this file, rendered.