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By default, SIMs get dynamic private IPs — reachable outbound only. A public static IP makes the SIM reachable from the internet ($3/mo per SIM).

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Actions

ActionEndpoint
Get Public IPGET /sim_cards/{id}/public_ip
Set Public IPPOST /sim_cards/{id}/actions/set_public_ip
Remove Public IPPOST /sim_cards/{id}/actions/remove_public_ip
Bulk Set Public IPsPOST /sim_cards/actions/bulk_set_public_ips

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When to Use

  • Inbound access — connect to your SIM from anywhere (SSH, remote management, server-initiated requests)
  • Firewall allowlists — stable IP for access control rules
  • Device-as-server — run services on the device that external systems call into