# Glasshand > Dedicated physical iPhones and Macs for agents. Monthly subscriptions, human email OTP approval, and authenticated screen/input control. - [Agent instructions](https://glasshand.com/agents.md): authentication, rentals, cancellation, connecting and trust boundaries. - [OpenAPI reference](https://api.glasshand.com/openapi.json): machine-readable REST API schema. - [Human dashboard](https://app.glasshand.com): sign in, approve agents, manage rentals, control devices and billing. Open registration and live monthly rentals: iPhone $60 USD/month; Mac $90 USD/month, plus applicable tax. The human approves payment in Stripe. Check API catalog billingMode before presenting a checkout as a purchase. - [Terms of service](https://glasshand.com/terms) - [Privacy policy](https://glasshand.com/privacy)