Updates
New features, registry changes, and engineering notes. Also available as RSS.
- № 001
Who Builds Agents: a directory of the companies shipping MCP servers
whobuildsagents.com ranks 16,990 companies by the MCP servers they publish to the Official MCP Registry. Why it lists companies and never people, how a registry name becomes a company, and what we learned about counting.
- № 002
The OAuth callbacks an MCP server has to allow for Claude, ChatGPT and Claude Code
The exact redirect URIs Claude, ChatGPT and Claude Code send to a remote MCP server, why an allowlist matters when registration is open, and how two of our servers handle it today.
- № 003
Manage your runs-on.dev name from Claude Code, Codex, or any MCP agent
The runs-on.dev MCP server can now edit your DNS, deploy a static site, and roll it back. Add one line to your agent, sign in once in the browser, and ask in plain words.
- № 004
Overlap: the first thing built on runs-on.dev
A meeting-time finder now lives at overlap.runs-on.dev. What it does, why sleep is a hard constraint, and what the registry looked like from the inside as a consumer of itself.
№ 005One thousand names
The registry crossed a thousand claimed names. Congratulations to everyone who claimed one, pointed it somewhere, or sent a fix.
№ 006A new look for runs-on.dev
The registry has a new visual system: a darker, quieter reading experience, a proper blog, and a set of agent-readable surfaces for tools that want to integrate.
- № 007
Speaking to agents: OpenAPI, MCP, and markdown on runs-on.dev
The registry now publishes an OpenAPI spec, an MCP server, protected-resource metadata, and markdown negotiation — here is what each one is for.
- № 008
The claim heat map, and what the dots mean
How the new world map on the stats page is built, where its coordinates come from, and what the 404 row is for.