Port forwards

A port forward exposes a port inside a running VM to the public internet via a Firecase-managed proxy. Useful for serving HTTP from the sandbox (dev servers, AI-generated apps, webhook receivers) without provisioning a load balancer.

Each forward returns a stable public URL. Forwards live as long as the instance does — they survive VM restarts.

Endpoints

• GET /v1/instances/:id/port-forwards — list active forwards
• POST /v1/instances/:id/port-forwards — open a new forward
• DELETE /v1/instances/:instance_id/port-forwards/:forward_id — close a forward

Related

• VMs — VM must be running for traffic to reach the forwarded port
• Port forwarding concept — networking model, TLS, custom hostnames