# Grok Build Remote > Control Grok Build CLI sessions from your phone. No network, no VPN — Grok is the relay. ## Product - **Site:** https://grokbuildremote.com/ - **Brand:** Grok Build Remote (Linespotting Org) - **Problem:** Developers need phone control of named desktop CLI / Grok Build sessions without VPN or open ports. - **Solution:** Mobile apps + free desktop agent. Both talk to a durable HTTPS relay. Phone never connects to PC. ## Pipeline Mobile app → durable relay (gbr/1 envelopes) → gbr-agent on PC → terminal inject/capture → output back via relay. ## Pricing - Desktop agent (Windows, Mac, Linux): **free** - iOS app: **$12.50** one-time (App Store) - Android app: **$12.50** one-time (Google Play) ## Install ``` curl -fsSL https://grokbuildremote.com/install.sh | bash gbr-agent pair -code YOURCODE gbr-agent run ``` ## Protocol - Envelope proto: `gbr/1` - Pairing code maps to mailbox id: `gbr-` - Session ids: slug `^[a-z0-9][a-z0-9-]{1,62}$` ## Not this product - Not a general SSH replacement - Not a mesh VPN - Agent source is private IP (binaries free) ## Legal - Terms: https://grokbuildremote.com/tos/ - Privacy: https://grokbuildremote.com/privacypolicy/ ## Contact Linespotting Org · GitHub org: https://github.com/LinespottingOrg