Spacefast

Publish the sites your agents build. One command, a live URL, immutable versions, custom domains.

Spacefast hosts the sites people build with AI agents. You hand it a folder, it hands back a URL. Everything you can do in the dashboard you can also do from the sf CLI, the HTTP API, or an MCP server, so the agent that built the site can publish it too.

Publish in one command

npm install -g spacefast

sf publish ./dist

No account needed for the first publish. The CLI creates a Space, uploads the files, and prints a live URL plus a claim link. Sign in later to keep it.

Published: https://quiet-harbor.space.fast

  Open          https://quiet-harbor.space.fast
  Version URL   https://quiet-harbor--v1.space.fast
  Version       v1 (ready)
  Files         12
  Duration      3.2s

Or ask the agent that built it.

How it fits together

A Space is one site with a stable hostname. Every publish creates a new version, an immutable snapshot with its own URL that never changes. The live channel points at one version. Promoting or rolling back moves that pointer. Nothing gets rebuilt.

Static output is the default path. Point sf publish at a build directory and it uploads only the files that changed. If you’d rather publish source, Spacefast detects the framework and builds it. Sites that need a database, server functions, or scheduled jobs opt into the Zero runtime with one line of config.