Langflow Traces API

openapi: 3.1.0
info:
  title: Langflow Base Traces API
  version: 1.9.0
tags:
- name: Traces
paths:
  /api/v1/monitor/traces:
    delete:
      description: 'Delete all traces for a flow.<br><br>Args:<br>    flow_id: The ID of the flow whose traces should be deleted.<br>    current_user: The authenticated user (required for authorization).'
      operationId: delete_traces_by_flow_api_v1_monitor_traces_delete
      parameters:
      - in: query
        name: flow_id
        required: true
        schema:
          format: uuid
          title: Flow Id
          type: string
      responses:
        '204':
          description: Successful Response
        '422':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
          description: Validation Error
      security:
      - OAuth2PasswordBearerCookie: []
      - API key query: []
      - API key header: []
      summary: Delete Traces By Flow
      tags:
      - Traces
    get:
      description: 'Get list of traces for a flow.<br><br>Args:<br>    current_user: Authenticated user (required for authorization)<br>    flow_id: Filter by flow ID<br>    session_id: Filter by session ID<br>    status: Filter by trace status<br>    query: Search query for trace name/id/session id<br>    start_time: Filter traces starting on/after this time (ISO)<br>    end_time: Filter traces starting on/before this time (ISO)<br>    page: Page number (1-based)<br>    size: Page size<br><br>Returns:<br>    List of traces'
      operationId: get_traces_api_v1_monitor_traces_get
      parameters:
      - in: query
        name: flow_id
        required: false
        schema:
          anyOf:
          - format: uuid
            type: string
          - type: 'null'
          title: Flow Id
      - in: query
        name: session_id
        required: false
        schema:
          anyOf:
          - type: string
          - type: 'null'
          title: Session Id
      - in: query
        name: status
        required: false
        schema:
          anyOf:
          - $ref: '#/components/schemas/SpanStatus'
          - type: 'null'
          title: Status
      - in: query
        name: query
        required: false
        schema:
          anyOf:
          - type: string
          - type: 'null'
          title: Query
      - in: query
        name: start_time
        required: false
        schema:
          anyOf:
          - format: date-time
            type: string
          - type: 'null'
          title: Start Time
      - in: query
        name: end_time
        required: false
        schema:
          anyOf:
          - format: date-time
            type: string
          - type: 'null'
          title: End Time
      - in: query
        name: page
        required: false
        schema:
          default: 1
          minimum: 0
          title: Page
          type: integer
      - in: query
        name: size
        required: false
        schema:
          default: 50
          maximum: 200
          minimum: 1
          title: Size
          type: integer
      responses:
        '200':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/TraceListResponse'
          description: Successful Response
        '422':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
          description: Validation Error
      security:
      - OAuth2PasswordBearerCookie: []
      - API key query: []
      - API key header: []
      summary: Get Traces
      tags:
      - Traces
  /api/v1/monitor/traces/{trace_id}:
    delete:
      description: 'Delete a trace and all its spans.<br><br>Args:<br>    trace_id: The ID of the trace to delete.<br>    current_user: The authenticated user (required for authorization).'
      operationId: delete_trace_api_v1_monitor_traces__trace_id__delete
      parameters:
      - in: path
        name: trace_id
        required: true
        schema:
          format: uuid
          title: Trace Id
          type: string
      responses:
        '204':
          description: Successful Response
        '422':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
          description: Validation Error
      security:
      - OAuth2PasswordBearerCookie: []
      - API key query: []
      - API key header: []
      summary: Delete Trace
      tags:
      - Traces
    get:
      description: 'Get a single trace with its hierarchical span tree.<br><br>Args:<br>    trace_id: The ID of the trace to retrieve.<br>    current_user: The authenticated user (required for authorization).<br><br>Returns:<br>    TraceRead containing the trace and its hierarchical span tree.'
      operationId: get_trace_api_v1_monitor_traces__trace_id__get
      parameters:
      - in: path
        name: trace_id
        required: true
        schema:
          format: uuid
          title: Trace Id
          type: string
      responses:
        '200':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/TraceRead'
          description: Successful Response
        '422':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
          description: Validation Error
      security:
      - OAuth2PasswordBearerCookie: []
      - API key query: []
      - API key header: []
      summary: Get Trace
      tags:
      - Traces
components:
  schemas:
    SpanType:
      description: Types of spans that can be recorded.
      enum:
      - chain
      - llm
      - tool
      - retriever
      - embedding
      - parser
      - agent
      title: SpanType
      type: string
    HTTPValidationError:
      properties:
        detail:
          items:
            $ref: '#/components/schemas/ValidationError'
          title: Detail
          type: array
      title: HTTPValidationError
      type: object
    SpanStatus:
      description: 'OpenTelemetry status codes.


        - UNSET: Default status, span has not ended yet

        - OK: Span completed successfully

        - ERROR: Span completed with an error'
      enum:
      - unset
      - ok
      - error
      title: SpanStatus
      type: string
    ValidationError:
      properties:
        ctx:
          title: Context
          type: object
        input:
          title: Input
        loc:
          items:
            anyOf:
            - type: string
            - type: integer
          title: Location
          type: array
        msg:
          title: Message
          type: string
        type:
          title: Error Type
          type: string
      required:
      - loc
      - msg
      - type
      title: ValidationError
      type: object
    TraceSummaryRead:
      description: 'Lightweight trace model for list endpoint.


        Serializes to camelCase JSON to match the frontend API contract.'
      properties:
        flowId:
          format: uuid
          title: Flowid
          type: string
        id:
          format: uuid
          title: Id
          type: string
        input:
          anyOf:
          - additionalProperties: true
            type: object
          - type: 'null'
          title: Input
        name:
          title: Name
          type: string
        output:
          anyOf:
          - additionalProperties: true
            type: object
          - type: 'null'
          title: Output
        sessionId:
          title: Sessionid
          type: string
        startTime:
          anyOf:
          - format: date-time
            type: string
          - type: 'null'
          title: Starttime
        status:
          $ref: '#/components/schemas/SpanStatus'
        totalLatencyMs:
          title: Totallatencyms
          type: integer
        totalTokens:
          title: Totaltokens
          type: integer
      required:
      - id
      - name
      - status
      - startTime
      - totalLatencyMs
      - totalTokens
      - flowId
      - sessionId
      title: TraceSummaryRead
      type: object
    TraceListResponse:
      description: Paginated list response for traces.
      properties:
        pages:
          title: Pages
          type: integer
        total:
          title: Total
          type: integer
        traces:
          items:
            $ref: '#/components/schemas/TraceSummaryRead'
          title: Traces
          type: array
      required:
      - traces
      - total
      - pages
      title: TraceListResponse
      type: object
    TraceRead:
      description: 'Response model for a single trace with its hierarchical span tree.


        Serializes to camelCase JSON to match the frontend API contract.'
      properties:
        endTime:
          anyOf:
          - format: date-time
            type: string
          - type: 'null'
          title: Endtime
        flowId:
          format: uuid
          title: Flowid
          type: string
        id:
          format: uuid
          title: Id
          type: string
        input:
          anyOf:
          - additionalProperties: true
            type: object
          - type: 'null'
          title: Input
        name:
          title: Name
          type: string
        output:
          anyOf:
          - additionalProperties: true
            type: object
          - type: 'null'
          title: Output
        sessionId:
          title: Sessionid
          type: string
        spans:
          items:
            $ref: '#/components/schemas/SpanReadResponse'
          title: Spans
          type: array
        startTime:
          anyOf:
          - format: date-time
            type: string
          - type: 'null'
          title: Starttime
        status:
          $ref: '#/components/schemas/SpanStatus'
        totalLatencyMs:
          title: Totallatencyms
          type: integer
        totalTokens:
          title: Totaltokens
          type: integer
      required:
      - id
      - name
      - status
      - startTime
      - endTime
      - totalLatencyMs
      - totalTokens
      - flowId
      - sessionId
      title: TraceRead
      type: object
    SpanReadResponse:
      description: 'Response model for a single span, with nested children.


        Serializes to camelCase JSON to match the frontend API contract.'
      properties:
        children:
          items:
            $ref: '#/components/schemas/SpanReadResponse'
          title: Children
          type: array
        endTime:
          anyOf:
          - format: date-time
            type: string
          - type: 'null'
          title: Endtime
        error:
          anyOf:
          - type: string
          - type: 'null'
          title: Error
        id:
          format: uuid
          title: Id
          type: string
        inputs:
          anyOf:
          - additionalProperties: true
            type: object
          - type: 'null'
          title: Inputs
        latencyMs:
          title: Latencyms
          type: integer
        modelName:
          anyOf:
          - type: string
          - type: 'null'
          title: Modelname
        name:
          title: Name
          type: string
        outputs:
          anyOf:
          - additionalProperties: true
            type: object
          - type: 'null'
          title: Outputs
        startTime:
          anyOf:
          - format: date-time
            type: string
          - type: 'null'
          title: Starttime
        status:
          $ref: '#/components/schemas/SpanStatus'
        tokenUsage:
          anyOf:
          - additionalProperties: true
            type: object
          - type: 'null'
          title: Tokenusage
        type:
          $ref: '#/components/schemas/SpanType'
      required:
      - id
      - name
      - type
      - status
      - startTime
      - endTime
      - latencyMs
      - inputs
      - outputs
      - error
      - modelName
      - tokenUsage
      title: SpanReadResponse
      type: object
  securitySchemes:
    API key header:
      in: header
      name: x-api-key
      type: apiKey
    API key query:
      in: query
      name: x-api-key
      type: apiKey
    OAuth2PasswordBearerCookie:
      flows:
        password:
          scopes: {}
          tokenUrl: api/v1/login
      type: oauth2