> ## 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.

# Search trace evidence

> Search visible span content, grouped into trace-level results. Distinct from structural search.



## OpenAPI

````yaml https://api.uselemma.ai/openapi.json get /traces/search/evidence
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/evidence:
    get:
      tags:
        - Traces
      summary: Search trace evidence
      description: >-
        Search visible span content, grouped into trace-level results. Distinct
        from structural search.
      operationId: search_trace_evidence
      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: trace_id
          in: query
          required: false
          description: Restrict evidence search to one trace.
          schema:
            type: string
        - name: sort
          in: query
          required: false
          description: Trace search sort mode.
          schema:
            type: string
        - name: cursor
          in: query
          required: false
          description: Opaque cursor for the next ranked result page.
          schema:
            type: string
        - name: limit
          in: query
          required: false
          description: Maximum number of records to return.
          schema:
            type: integer
            minimum: 1
      responses:
        '200':
          description: Evidence search results
          content:
            application/json:
              schema:
                type: object
                properties:
                  results:
                    type: array
                    items:
                      type: object
                      properties:
                        traceId:
                          type: string
                          minLength: 1
                        otelTraceId:
                          type: string
                          minLength: 1
                        timestamp:
                          type: string
                          format: date-time
                        score:
                          type:
                            - number
                            - 'null'
                        matchSites:
                          type: array
                          items:
                            type: object
                            properties:
                              matchId:
                                type: string
                                minLength: 1
                                maxLength: 1024
                              spanId:
                                type:
                                  - string
                                  - 'null'
                                minLength: 1
                              spanName:
                                type:
                                  - string
                                  - 'null'
                              field:
                                type: string
                                enum:
                                  - trace_id
                                  - span_id
                                  - span
                                  - tool
                                  - model
                                  - service
                                  - status
                                  - error
                                  - event
                                  - input
                                  - output
                                  - attribute
                              attributePath:
                                type:
                                  - string
                                  - 'null'
                                minLength: 1
                              snippet:
                                type:
                                  - string
                                  - 'null'
                                minLength: 1
                                maxLength: 4096
                              rank:
                                type: integer
                                exclusiveMinimum: 0
                            required:
                              - matchId
                              - spanId
                              - spanName
                              - field
                              - attributePath
                              - snippet
                              - rank
                            additionalProperties: false
                          maxItems: 20
                      required:
                        - traceId
                        - otelTraceId
                        - timestamp
                        - score
                        - matchSites
                      additionalProperties: false
                  meta:
                    type: object
                    properties:
                      matchedTraceCount:
                        type: integer
                        minimum: 0
                      countRelation:
                        type: string
                        enum:
                          - exact
                          - lower_bound
                      returnedTraceCount:
                        type: integer
                        minimum: 0
                      limit:
                        type: integer
                        exclusiveMinimum: 0
                        maximum: 100
                      completeness:
                        type: string
                        enum:
                          - complete
                          - partial
                      truncated:
                        type: boolean
                      truncationReason:
                        type:
                          - string
                          - 'null'
                        enum:
                          - result_limit
                          - candidate_limit
                          - backend_timeout
                          - index_incomplete
                          - null
                      appliedTimeRange:
                        type: object
                        properties:
                          start:
                            type:
                              - string
                              - 'null'
                            format: date-time
                          end:
                            type:
                              - string
                              - 'null'
                            format: date-time
                        required:
                          - start
                          - end
                        additionalProperties: false
                      sortMode:
                        type: string
                        enum:
                          - relevance
                          - timestamp_desc
                          - timestamp_asc
                          - duration_desc
                          - duration_asc
                          - spans_desc
                          - spans_asc
                      nextCursor:
                        type:
                          - string
                          - 'null'
                        minLength: 1
                    required:
                      - matchedTraceCount
                      - countRelation
                      - returnedTraceCount
                      - limit
                      - completeness
                      - truncated
                      - truncationReason
                      - appliedTimeRange
                      - sortMode
                      - nextCursor
                    additionalProperties: false
                required:
                  - results
                  - 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

````