Host API
GET /id- Returns the host ID.
POST /users- Registers a user. See Auth architecture.
POST /ops- Uploads an (encrypted) op.
GET /ops/:path- Returns an (encrypted) op.
GET /ops?begin=$TIMESTAMP- Returns a list of paths to all ops uploaded beginning at
$TIMESTAMP.
- Returns a list of paths to all ops uploaded beginning at
ws://hostURL?key=$PUBKEY- Initiate a WebSocket connection to receive real-time notifications when the host receives a new op.

