Moonraker: query printer objects/status via HTTP or WebSocket
domain: moonraker.readthedocs.io · 5 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗
Steps
Use plain HTTP for one-off queries, or open a persistent WebSocket/Unix-socket connection if ongoing subscriptions are needed.
For HTTP, call GET or POST /printer/objects/query specifying which printer objects/attributes to fetch.
For WebSocket, send a JSON-RPC request with method "printer.objects.query" and params.objects mapping object names to null (all fields) or a list of specific attributes.
Use "printer.objects.subscribe" over the persistent connection instead of repeated polling to receive asynchronous status pushes.
Parse the returned status object, keyed by printer object name; note unavailable objects/attributes are silently omitted rather than erroring.
Known gotchas
The legacy endpoint /printer/objects/status (get_printer_objects_status) was renamed to /printer/objects/query (get_printer_objects_query) — integrations built from older references will 404.
Requesting a nonexistent object/attribute returns no error — it's simply missing from the response, which can mask printer.cfg misconfiguration.
Subscriptions require a persistent connection; plain HTTP polling works for one-off queries but not for subscribe-based push updates.
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