Your Space ID is a unique numeric identifier for your Storyblok space, used for API access and integrations.

With admin access

Go to Settings → Space. Your Space ID appears at the top of the page.

Without admin access

Look at your browser's URL while logged into the space. It follows this pattern:

https://app.storyblok.com/#/me/spaces/SPACE_ID/dashboard

The number in the SPACE_ID position is your Space ID.