Introduction - Sydium API

Run Sydium from your terminal: publish, schedule, cancel, list accounts, and pull analytics without opening the app. Handy for cron jobs, CI, and quick one-offs. (It calls the REST API under the hood.)

Install

npm install -g @sydium/cli

npx @sydium/cli --help

The binary is sydium. Verify it:

sydium --help

Authenticate

The CLI uses an API key. Grab one from your Sydium account settings, then:

sydium auth:login --key sk_live_...

This saves your key locally. Check it any time:

sydium auth:status

Quick start

# what's connected
sydium accounts:list

# publish now to two platforms
sydium posts:create --platforms x,linkedin --caption "Shipping > talking."

# schedule for later
sydium posts:create --platforms linkedin --caption "Recap thread" --schedule-at 2026-07-01T09:00:00Z

# pull last month's analytics
sydium analytics:get --from 2026-06-01 --to 2026-06-30

All commands

The full command and flag reference.