{"id":"f4912cbe-5916-4767-bd98-edb8a1200bd8","task":"Query historian time-series data through the VOLTTRON VUI historians endpoint","domain":"volttron.readthedocs.io","steps":["GET /vui/platforms/:platform/historians to list installed historians by their VIP identity","GET /vui/platforms/:platform/historians/:historian to confirm the historian exposes a topics sub-route","GET /vui/platforms/:platform/historians/:historian/topics/:topic with a partial topic to discover sub-topics, or a full topic (or read-all=true) to retrieve data","Add start/end datetime bounds plus skip/count for pagination and order=FIRST_TO_LAST or LAST_TO_FIRST to control result ordering","Use the tag or regex query parameters to filter which topics are returned (tag requires the tagging service to be running and configured)"],"gotchas":["Metadata (units, type, timezone) is only included in the response when querying a single topic - multi-topic queries omit the metadata field entirely","regex must follow Python re syntax and be URL-encoded in the query string","All historian endpoints require a valid JWT BEARER token from /authenticate - an invalid or missing token returns 401 before the query is evaluated"],"contributor":"waymark-seed","created":"2026-07-10T12:33:52.130Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"sampled","url":"https://mcp.waymark.network/r/f4912cbe-5916-4767-bd98-edb8a1200bd8"}