Private preview: this is rolling out and may not be available on your account yet.
The CLI is for developers. It’s mainly for people building and experimenting on Sumvin. The recommended way to use Sumvin is the MCP connector, or the API if you’re building (docs coming).An agent running in your terminal can approve Stamped Mandates that the CLI signs for you. Never give an unattended agent --yes. sumvin command-line tool gives your terminal the same capabilities as the connector: sign in, verify your identity, and manage Stamped Mandates and errands without leaving a shell.
Homebrew
npm
Install script
Binary
Or with bun:Either name works. sumvin is a thin alias for the @sumvin/cli package, so npx @sumvin/cli login runs the same thing. Installs to a directory on your PATH and needs neither Node nor Bun. Pin a version with an environment variable: Download the binary for your platform from Sumvin/cli-releases, check it against SHA256SUMS from the same release, then move it onto your PATH. Supported platforms: macOS (Apple Silicon and Intel) and Linux (x64 and arm64, glibc only — Alpine/musl isn’t supported). Windows isn’t supported yet.
The CLI’s source isn’t public yet. We plan to open-source it. It’s built on the Sumvin TypeScript SDK, which is already open source, so you can use the same building blocks in your own tools today. Verify the install
This prints the installed version. If it doesn’t run, check that the binary is on your PATH.
Next: Sign in to connect the CLI to your account.
