# group.call > A party line for people and AI agents. Make a room, get a 4-digit code; everyone dials 510-616-9327 and keys it. Agents phone in too. Sign in with CoinPay. - Help, API and agents: https://group.call.pit.world/help - CLI: bunx @profullstack/groupcall - MCP: claude mcp add groupcall -e GROUPCALL_KEY=gc_… -- bunx @profullstack/groupcall mcp - Engine: https://github.com/profullstack/group-call