> ## Documentation Index > Fetch the complete documentation index at: https://orbit.nckrtl.com/docs/llms.txt > Use this file to discover all available pages before exploring further. # Authorize the agent's presence channel > The `orbit-agent` on a managed Node calls this endpoint to join its own presence channels. The Gateway signs member `agent.{id}` on `presence-node.{id}` or `presence-node-logs.{id}` only for a request from that Node's WireGuard address that carries the Node's agent secret. The response carries the Pusher `auth` and `channel_data` values. ## OpenAPI ````yaml /openapi.json post /api/v1/agent/broadcasting/auth openapi: 3.1.0 info: title: Orbit Gateway API version: v1 description: >- The HTTP API of the active Orbit Gateway. The CLI and the PHP SDK send every fleet command through these endpoints over WireGuard. See [Using the API](/api/overview) for transport, authentication, envelopes, and errors. servers: - url: https://gateway.orbit description: >- The active Gateway on the private WireGuard network, resolved by Orbit private DNS. security: [] tags: - name: Gateway description: >- Status and trust of the active Gateway, and the releases of the Gateway itself. - name: Nodes description: Machines in the fleet, their roles, access grants, and storage settings. - name: Clusters description: Groups of Nodes with one Router and one development TLD. - name: Firewall description: Named UFW rules on one Node. - name: Fleet rollout description: >- The rollout of each verified Gateway release to the managed Nodes, and its catch-up. - name: Tools description: Packages that Orbit installs on a Node through a Tool Manager. - name: Metrics description: The Prometheus and Grafana role and its exporters. - name: GitHub App description: The Gateway's own read-only GitHub App and the accounts that installed it. - name: Analytics description: >- The analytics role, its Plausible version, and the Stats API key the Gateway uses to read visits. - name: Projects description: Repository records with one type, default branch, and web root each. - name: Instances description: Development checkouts and production releases of a Project on one Node. - name: Environment description: Stored Instance environment configuration and its .env projection. - name: Routes description: Domains that reach an Instance. - name: Database connections description: The registry of mysql, pgsql, and sqlite connections. - name: Processes description: >- systemd services and Docker containers owned by an Instance, a Node, or a Project definition. - name: Schedules description: Recurring commands run by native systemd timers. - name: Annotations description: Instance annotations, T3 delivery, and replayable status events. - name: Tasks description: Commander feature groups and ordered subtasks. - name: Extensions description: Gateway-owned extension switches. - name: Doctor description: Verify-only drift checks across the fleet. - name: Activities description: The Gateway log of authorized commands. - name: proxycli description: CLIProxyAPI quota snapshots, provider pools, and account controls. - name: Vaultwarden description: The copy of database credentials into a Vaultwarden collection. - name: Conn description: >- Profiles, shared workspace settings, registered T3 servers, and the pairing links the Gateway mints on them for each Node. - name: Realtime description: >- The record-change event feed broadcast to Reverb, its channel authorization, and Reverb connection discovery. - name: Node callbacks description: Endpoints that managed Nodes and Caddy call; operators do not call them. paths: /api/v1/agent/broadcasting/auth: post: tags: - Node callbacks summary: Authorize the agent's presence channel description: >- The `orbit-agent` on a managed Node calls this endpoint to join its own presence channels. The Gateway signs member `agent.{id}` on `presence-node.{id}` or `presence-node-logs.{id}` only for a request from that Node's WireGuard address that carries the Node's agent secret. The response carries the Pusher `auth` and `channel_data` values. operationId: agent-realtime-auth requestBody: required: true content: application/json: schema: type: object properties: socket_id: type: string pattern: ^\d+\.\d+$ channel_name: type: string version: type: - string - 'null' pattern: ^[0-9A-Za-z.+-]{1,32}$ required: - socket_id - channel_name additionalProperties: false responses: '200': description: The Pusher channel signature. content: application/json: schema: type: object properties: auth: type: string description: Pusher channel signature. channel_data: type: string description: JSON-encoded presence member data. required: - auth - channel_data '401': description: The request carries no agent secret (`agent.secret_required`). content: application/json: schema: $ref: '#/components/schemas/Error' '403': description: >- The caller is not an active WireGuard peer (`peer.identity_unknown`), its agent secret does not match (`agent.secret_invalid`), its Node is not eligible for an agent (`agent.node_ineligible`), or it asked for another Node's channel (`agent.channel_forbidden`). content: application/json: schema: $ref: '#/components/schemas/Error' '404': description: Realtime is not configured (`realtime.not_configured`). content: application/json: schema: $ref: '#/components/schemas/Error' '422': description: >- The JSON body is not an object, has duplicate or unknown members, or fails validation (`validation.failed`). content: application/json: schema: $ref: '#/components/schemas/Error' x-codeSamples: - lang: bash label: curl source: > curl -sS -X POST "https://gateway.orbit/api/v1/agent/broadcasting/auth" \ --cacert /path/to/orbit-root-ca.pem \ -H 'Accept: application/json' \ -H 'X-Orbit-Request-Id: 9d6b1e5c-4a3f-4a1b-9f0e-6d2c3f5a7b81' \ -H 'Content-Type: application/json' \ -d '{"socket_id": "example", "channel_name": "example", "version": "example"}' components: schemas: Error: type: object properties: error: type: object properties: code: type: string description: >- Stable error code, namespaced by family, such as `node.not_active` or `route.target_conflict`. message: type: string description: >- Safe message without credentials, environment values, or remote output. details: type: object additionalProperties: true description: >- Bounded, redacted details such as the conflicting record IDs or the failed validation rule. request_id: type: string format: uuid required: - code - message required: - error ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.