class TracesReturns runs for a trace ID within min/max start time. Optional filter;
repeatable selects to select fields to return.
Self-hosted deployments require LangSmith v0.16 or later.
Returns a paginated list of traces (root runs) for a single tracing project.
Each item carries the trace's root run plus optional trace-wide aggregates
(total_tokens, total_cost, first_token_time) under trace_aggregates, so
clients never have to merge by trace_id.
Traces are scanned within a start_time window: min_start_time defaults to 24
hours before the request, max_start_time defaults to the request time. Set
either explicitly to widen or narrow the window.
Supports filters (trace_filter, tree_filter), cursor pagination (cursor),
and field projection (selects).
When ai_search is set, Accept: text/event-stream is required; requests
without it return 406. AI search is unavailable on deployments that route
queries to the v1 backend and returns 501 there.
Self-hosted deployments require LangSmith v0.16 or later.