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Reusable Snippets

Copy-paste snippets for common controller, command, and stream workflows. All examples use environment variables for sensitive values.

Snippet index​

StageSection
Controller bootstrapRegister and get token
Session discoveryConnected nodes
Session maintenanceToken refresh
Transport bootstrapWebSocket hello and auth frames
Command executioncommand.run and command.test
Stream lifecyclelistener.subscribe and command_cancel

Controller registration and token​

# Register a new controller client
curl -sS -X POST "$OTTO_RELAY_HTTP_URL/api/controller/register" \
  -H "Content-Type: application/json" \
  -d '{"name":"my-controller","description":"automation worker"}'

# Exchange client credentials for an access token
curl -sS -X POST "$OTTO_RELAY_HTTP_URL/api/controller/token" \
  -H "Content-Type: application/json" \
  -d '{"clientId":"'$OTTO_CLIENT_ID'","clientSecret":"'$OTTO_CLIENT_SECRET'"}'

Node discovery​

curl -sS "$OTTO_RELAY_HTTP_URL/api/nodes/connected" \
  -H "Authorization: Bearer $OTTO_ACCESS_TOKEN"

Response:

{ "nodes": [{ "nodeId": "node_local_1" }] }

Token refresh​

curl -sS -X POST "$OTTO_RELAY_HTTP_URL/api/auth/refresh" \
  -H "Content-Type: application/json" \
  -d '{"refreshToken":"'$OTTO_REFRESH_TOKEN'"}'

WebSocket bootstrap​

Send hello and then auth in order. Wait for auth_ack before sending command envelopes.

{
  "protocolVersion": "1.0",
  "messageType": "hello",
  "requestId": "req_hello_1",
  "timestamp": "2026-04-14T13:10:00.000Z",
  "senderRole": "controller",
  "payload": {"role": "controller", "capabilities": ["commands", "logs"]}
}
{
  "protocolVersion": "1.0",
  "messageType": "auth",
  "requestId": "req_auth_1",
  "timestamp": "2026-04-14T13:10:00.020Z",
  "senderRole": "controller",
  "payload": {"accessToken": "<jwt>"}
}

Command frames​

Minimum replay-safe command.run envelope:

{
  "protocolVersion": "1.0",
  "messageType": "command",
  "requestId": "req_cmd_run_1",
  "timestamp": "2026-04-14T13:10:40.000Z",
  "senderRole": "controller",
  "payload": {
    "targetNodeId": "node_local_1",
    "tabSessionId": "tab_abc",
    "action": "command.run",
    "payload": {"site": "reddit.com", "command": "getFeed"},
    "replayNonce": "nonce_cmd_run_1"
  }
}

command.test envelope (same shape, different action):

{
  "protocolVersion": "1.0",
  "messageType": "command",
  "requestId": "req_cmd_test_1",
  "timestamp": "2026-04-14T13:11:00.000Z",
  "senderRole": "controller",
  "payload": {
    "targetNodeId": "node_local_1",
    "tabSessionId": "tab_abc",
    "action": "command.test",
    "payload": {"site": "reddit.com", "command": "getChatMessages"},
    "replayNonce": "nonce_cmd_test_1"
  }
}

Stream lifecycle​

Subscribe to a network listener. Use the subscribe requestId to correlate incoming listener_update events.

{
  "protocolVersion": "1.0",
  "messageType": "command",
  "requestId": "req_sub_1",
  "timestamp": "2026-04-14T13:11:05.000Z",
  "senderRole": "controller",
  "payload": {
    "targetNodeId": "node_local_1",
    "action": "listener.subscribe",
    "payload": {
      "listener": "network.http_intercept",
      "options": {"tabSessionId": "tab_abc", "site": "reddit.com", "mode": "fetch"}
    },
    "replayNonce": "nonce_sub_1"
  }
}

Cancel an active stream session using the original command.test requestId:

{
  "protocolVersion": "1.0",
  "messageType": "command_cancel",
  "requestId": "req_cancel_1",
  "timestamp": "2026-04-14T13:12:10.000Z",
  "senderRole": "controller",
  "payload": {"targetRequestId": "req_cmd_test_1"}
}

Next steps​