# Inbound and Outbound Connections

<table><thead><tr><th width="253.1328125">Name</th><th width="344.26953125">URL</th><th width="105.32421875">Inbound</th><th width="113.09375">Outbound</th><th width="138.50390625">mTLS Access</th></tr></thead><tbody><tr><td>Digital Spine Message Broker</td><td>https://ddhub-ewc.energyweb.org</td><td>No</td><td>Yes</td><td>Yes</td></tr><tr><td>EWC RPC</td><td>https://rpc.energyweb.org</td><td>No</td><td>Yes</td><td>No</td></tr><tr><td>SSI-HUB</td><td>https://identitycache.energyweb.org</td><td>No</td><td>Yes</td><td>No</td></tr></tbody></table>