Press

Send a keyboard key to the current tab.

terminal 
pinchtab press Enter
curl -X POST http://localhost:9867/action \  -H "Content-Type: application/json" \  -d '{"kind":"press","key":"Enter"}'
Response 
{
  "success": true,
  "result": {
    "success": true
  }
}

Common keys include Enter, Tab, and Escape.