> ## Documentation Index
> Fetch the complete documentation index at: https://docs.uselemma.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Discover trace search facets

> Returns curated, bounded facets for the active trace-search context.



## OpenAPI

````yaml https://api.uselemma.ai/openapi.json get /traces/search/facets
openapi: 3.1.0
info:
  title: Lemma Platform API
  description: Lemma Platform HTTP API for AI observability and workspace operations.
  version: 0.1.0
servers:
  - url: https://api.uselemma.ai
    description: Lemma production API
security:
  - bearerAuth: []
paths:
  /traces/search/facets:
    get:
      tags:
        - Traces
      summary: Discover trace search facets
      description: Returns curated, bounded facets for the active trace-search context.
      operationId: search_trace_facets
      parameters:
        - name: project_id
          in: query
          required: true
          description: Project ID.
          schema:
            type: string
        - name: query
          in: query
          required: false
          description: Search query.
          schema:
            type: string
        - name: tool_name
          in: query
          required: false
          description: Tool name filter.
          schema:
            type: string
        - name: model
          in: query
          required: false
          description: Model filter.
          schema:
            type: string
        - name: agent_name
          in: query
          required: false
          description: Agent name filter.
          schema:
            type: string
        - name: has_error
          in: query
          required: false
          description: >-
            Span-error axis. true = only traces with span errors, false = only
            traces without, omitted = unconstrained. Independent of has_issues.
          schema:
            type: boolean
        - name: has_issues
          in: query
          required: false
          description: >-
            Issue axis. true = only traces with issue occurrences, false = only
            traces without, omitted = unconstrained. has_error=false with
            has_issues=true selects silent failures.
          schema:
            type: boolean
        - name: status
          in: query
          required: false
          description: >-
            Deprecated alias for the two axes, comma-separated: failures =
            has_error=true, flagged = has_issues=true, clean = has_error=false
            and has_issues=false. Cannot express error-only or issue-only;
            prefer has_error / has_issues, which override it per axis.
          schema:
            type: string
          deprecated: true
        - name: error_only
          in: query
          required: false
          description: >-
            Restrict the span-level search to error spans. Distinct from
            has_error, which filters whole traces by error count.
          schema:
            type: boolean
        - name: tool_error_only
          in: query
          required: false
          description: >-
            Same-span tool-error filter. Requires tool_name. Matches only traces
            where that tool failed on the same span the Analytics widget
            counted.
          schema:
            type: boolean
        - name: start
          in: query
          required: false
          description: Start timestamp.
          schema:
            type: string
        - name: end
          in: query
          required: false
          description: End timestamp.
          schema:
            type: string
        - name: min_spans
          in: query
          required: false
          description: Minimum span count.
          schema:
            type: string
        - name: max_spans
          in: query
          required: false
          description: Maximum span count.
          schema:
            type: string
        - name: min_duration_ms
          in: query
          required: false
          description: Minimum trace duration (ms).
          schema:
            type: string
        - name: max_duration_ms
          in: query
          required: false
          description: Maximum trace duration (ms).
          schema:
            type: string
        - name: min_tokens
          in: query
          required: false
          description: Minimum total token count.
          schema:
            type: string
        - name: min_thread_traces
          in: query
          required: false
          description: Minimum thread trace count.
          schema:
            type: string
        - name: max_thread_traces
          in: query
          required: false
          description: Maximum thread trace count.
          schema:
            type: string
        - name: attribute_filters
          in: query
          required: false
          description: JSON-serialized span attribute filters.
          schema:
            type: string
        - name: sort
          in: query
          required: false
          description: Trace search sort mode.
          schema:
            type: string
        - name: max_values
          in: query
          required: false
          description: Maximum values per facet.
          schema:
            type: string
      responses:
        '200':
          description: Trace search facets
          content:
            application/json:
              schema:
                type: object
                properties:
                  facets:
                    type: array
                    items:
                      type: object
                      properties:
                        field:
                          type: string
                          enum:
                            - agent
                            - status
                            - tool
                            - model
                            - span
                            - error_status
                            - service
                            - attribute_key
                        values:
                          type: array
                          items:
                            type: object
                            properties:
                              value:
                                type: string
                              count:
                                type:
                                  - integer
                                  - 'null'
                                minimum: 0
                            required:
                              - value
                              - count
                            additionalProperties: false
                        count_kind:
                          type: string
                          enum:
                            - traces
                            - spans
                        enumeration:
                          type: string
                          enum:
                            - complete
                            - bounded
                            - not_enumerable
                        searchable:
                          type: boolean
                      required:
                        - field
                        - values
                        - count_kind
                        - enumeration
                        - searchable
                      additionalProperties: false
                  attribute_fields:
                    type: array
                    items:
                      type: object
                      properties:
                        path:
                          type: string
                          minLength: 1
                        trace_count:
                          type: integer
                          minimum: 0
                        values:
                          type: array
                          items:
                            type: object
                            properties:
                              value:
                                type: string
                              count:
                                type:
                                  - integer
                                  - 'null'
                                minimum: 0
                            required:
                              - value
                              - count
                            additionalProperties: false
                        enumeration:
                          type: string
                          enum:
                            - complete
                            - bounded
                            - not_enumerable
                        searchable:
                          type: boolean
                          const: true
                      required:
                        - path
                        - trace_count
                        - values
                        - enumeration
                        - searchable
                      additionalProperties: false
                  meta:
                    type: object
                    properties:
                      scoped_trace_count:
                        type: integer
                        minimum: 0
                      sampled_trace_count:
                        type: integer
                        minimum: 0
                      count_relation:
                        type: string
                        enum:
                          - exact
                          - lower_bound
                      completeness:
                        type: string
                        enum:
                          - complete
                          - partial
                      applied_time_range:
                        type: object
                        properties:
                          start:
                            type:
                              - string
                              - 'null'
                            format: date-time
                          end:
                            type:
                              - string
                              - 'null'
                            format: date-time
                        required:
                          - start
                          - end
                        additionalProperties: false
                    required:
                      - scoped_trace_count
                      - sampled_trace_count
                      - count_relation
                      - completeness
                      - applied_time_range
                    additionalProperties: false
                required:
                  - facets
                  - attribute_fields
                  - meta
                additionalProperties: false
        '400':
          description: Bad request
          content:
            application/json:
              schema:
                type: object
                properties:
                  detail:
                    type: string
                  code:
                    type: string
                required:
                  - detail
                additionalProperties: false
        '404':
          description: Not found
          content:
            application/json:
              schema:
                type: object
                properties:
                  detail:
                    type: string
                  code:
                    type: string
                required:
                  - detail
                additionalProperties: false
components:
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer

````