Comet Spans API

openapi: 3.1.0
info:
  title: Opik REST Spans API
  description: "The Opik REST API is currently in beta and subject to change. If you have any questions or feedback about the APIs, please reach out on GitHub: https://github.com/comet-ml/opik.\n\nAll of the methods listed in this documentation are used by either the SDK or the UI to interact with the Opik server. As a result,\nthe methods have been optimized for these use-cases in mind. If you are looking for a method that is not listed above, please create\nand issue on GitHub or raise a PR!\n\nOpik includes two main deployment options that results in slightly different API usage:\n\n- **Self-hosted Opik instance:** You will simply need to specify the URL as `http://localhost:5173/api/<endpoint_path>` or similar. This is the default option for the docs.\n- **Opik Cloud:** You will need to specify the Opik API Key and Opik Workspace in the header. The format of the header should be:\n\n  ```\n  {\n    \"Comet-Workspace\": \"your-workspace-name\",\n    \"authorization\": \"your-api-key\"\n  }\n  ```\n\n  The full payload would therefore look like:\n  \n  ```\n  curl -X GET 'https://www.comet.com/opik/api/v1/private/projects' \\\n  -H 'Accept: application/json' \\\n  -H 'Comet-Workspace: <your-workspace-name>' \\\n  -H 'authorization: <your-api-key>'\n  ```\n\n  Do take note here that the authorization header value does not include the `Bearer ` prefix. To switch to using the Opik Cloud in the documentation, you can\n  click on the edit button displayed when hovering over the `Base URL` displayed on the right hand side of the docs.\n"
  contact:
    name: Github Repository
    url: https://github.com/comet-ml/opik
  license:
    name: Apache 2.0
    url: http://www.apache.org/licenses/LICENSE-2.0.html
  version: 1.0.0
servers:
- url: http://localhost:5173/api
  description: Local server
- url: https://www.comet.com/opik/api
  description: Opik Cloud
tags:
- name: Spans
  description: Span related resources
paths:
  /v1/private/spans/{id}/comments:
    post:
      tags:
      - Spans
      summary: Add span comment
      description: Add span comment
      operationId: addSpanComment
      parameters:
      - name: id
        in: path
        required: true
        schema:
          type: string
          format: uuid
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/Comment'
      responses:
        '201':
          description: Created
          headers:
            Location:
              required: true
              style: simple
              schema:
                type: string
              example: ${basePath}/v1/private/spans/{spanId}/comments/{commentId}
  /v1/private/spans/{id}/feedback-scores:
    put:
      tags:
      - Spans
      summary: Add span feedback score
      description: Add span feedback score
      operationId: addSpanFeedbackScore
      parameters:
      - name: id
        in: path
        required: true
        schema:
          type: string
          format: uuid
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/FeedbackScore'
      responses:
        '204':
          description: No Content
  /v1/private/spans/batch:
    post:
      tags:
      - Spans
      summary: Create spans
      description: Create spans
      operationId: createSpans
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/SpanBatch_Write'
      responses:
        '204':
          description: No Content
    patch:
      tags:
      - Spans
      summary: Batch update spans
      description: Update multiple spans
      operationId: batchUpdateSpans
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/SpanBatchUpdate'
      responses:
        '204':
          description: No Content
        '400':
          description: Bad Request
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorMessage'
  /v1/private/spans:
    get:
      tags:
      - Spans
      summary: Get spans by project_name or project_id and optionally by trace_id and/or type
      description: Get spans by project_name or project_id and optionally by trace_id and/or type
      operationId: getSpansByProject
      parameters:
      - name: page
        in: query
        schema:
          minimum: 1
          type: integer
          format: int32
          default: 1
      - name: size
        in: query
        schema:
          minimum: 1
          type: integer
          format: int32
          default: 10
      - name: project_name
        in: query
        schema:
          type: string
      - name: project_id
        in: query
        schema:
          type: string
          format: uuid
      - name: trace_id
        in: query
        schema:
          type: string
          format: uuid
      - name: type
        in: query
        schema:
          type: string
          enum:
          - general
          - tool
          - llm
          - guardrail
      - name: filters
        in: query
        schema:
          type: string
      - name: truncate
        in: query
        schema:
          type: boolean
          description: Truncate input, output and metadata to slim payloads
          default: false
      - name: strip_attachments
        in: query
        schema:
          type: boolean
          description: If true, returns attachment references like [file.png]; if false, downloads and reinjects stripped attachments
          default: false
      - name: sorting
        in: query
        schema:
          type: string
      - name: exclude
        in: query
        schema:
          type: string
      - name: search
        in: query
        schema:
          type: string
          description: Full-text search across span fields
      - name: from_time
        in: query
        schema:
          type: string
          description: Filter spans created from this time (ISO-8601 format).
          format: date-time
      - name: to_time
        in: query
        schema:
          type: string
          description: Filter spans created up to this time (ISO-8601 format). If not provided, defaults to current time. Must be after 'from_time'.
          format: date-time
      responses:
        '200':
          description: Spans resource
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/SpanPage_Public'
    post:
      tags:
      - Spans
      summary: Create span
      description: Create span
      operationId: createSpan
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/Span_Write'
      responses:
        '201':
          description: Created
          headers:
            Location:
              required: true
              style: simple
              schema:
                type: string
              example: ${basePath}/v1/private/spans/{spanId}
        '409':
          description: Conflict
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorMessage'
  /v1/private/spans/{id}:
    get:
      tags:
      - Spans
      summary: Get span by id
      description: Get span by id
      operationId: getSpanById
      parameters:
      - name: id
        in: path
        required: true
        schema:
          type: string
          format: uuid
      - name: strip_attachments
        in: query
        schema:
          type: boolean
          description: 'If true, returns attachment references like [file.png]; if false, downloads and reinjects attachment content from S3 (default: false for backward compatibility)'
          default: false
      responses:
        '200':
          description: Span resource
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Span_Public'
        '404':
          description: Not found
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Span_Public'
    delete:
      tags:
      - Spans
      summary: Delete span by id
      description: Delete span by id
      operationId: deleteSpanById
      parameters:
      - name: id
        in: path
        required: true
        schema:
          type: string
      responses:
        '501':
          description: Not implemented
        '204':
          description: No Content
    patch:
      tags:
      - Spans
      summary: Update span by id
      description: Update span by id
      operationId: updateSpan
      parameters:
      - name: id
        in: path
        required: true
        schema:
          type: string
          format: uuid
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/SpanUpdate'
      responses:
        '204':
          description: No Content
        '404':
          description: Not found
  /v1/private/spans/comments/delete:
    post:
      tags:
      - Spans
      summary: Delete span comments
      description: Delete span comments
      operationId: deleteSpanComments
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/BatchDelete'
      responses:
        '204':
          description: No Content
  /v1/private/spans/{id}/feedback-scores/delete:
    post:
      tags:
      - Spans
      summary: Delete span feedback score
      description: Delete span feedback score
      operationId: deleteSpanFeedbackScore
      parameters:
      - name: id
        in: path
        required: true
        schema:
          type: string
          format: uuid
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/DeleteFeedbackScore'
      responses:
        '204':
          description: No Content
  /v1/private/spans/feedback-scores/names:
    get:
      tags:
      - Spans
      summary: Find Feedback Score names
      description: Find Feedback Score names
      operationId: findFeedbackScoreNames_1
      parameters:
      - name: project_id
        in: query
        schema:
          type: string
          format: uuid
      - name: type
        in: query
        schema:
          type: string
          enum:
          - general
          - tool
          - llm
          - guardrail
      responses:
        '200':
          description: Feedback Scores resource
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/FeedbackScoreNames_Public'
  /v1/private/spans/{spanId}/comments/{commentId}:
    get:
      tags:
      - Spans
      summary: Get span comment
      description: Get span comment
      operationId: getSpanComment
      parameters:
      - name: commentId
        in: path
        required: true
        schema:
          type: string
          format: uuid
      - name: spanId
        in: path
        required: true
        schema:
          type: string
          format: uuid
      responses:
        '200':
          description: Comment resource
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Comment'
        '404':
          description: Not found
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorMessage'
  /v1/private/spans/stats:
    get:
      tags:
      - Spans
      summary: Get span stats
      description: Get span stats
      operationId: getSpanStats
      parameters:
      - name: project_id
        in: query
        schema:
          type: string
          format: uuid
      - name: project_name
        in: query
        schema:
          type: string
      - name: trace_id
        in: query
        schema:
          type: string
          format: uuid
      - name: type
        in: query
        schema:
          type: string
          enum:
          - general
          - tool
          - llm
          - guardrail
      - name: filters
        in: query
        schema:
          type: string
      - name: search
        in: query
        schema:
          type: string
          description: Full-text search across span fields
      - name: from_time
        in: query
        schema:
          type: string
          description: Filter spans created from this time (ISO-8601 format).
          format: date-time
      - name: to_time
        in: query
        schema:
          type: string
          description: Filter spans created up to this time (ISO-8601 format). If not provided, defaults to current time. Must be after 'from_time'.
          format: date-time
      responses:
        '200':
          description: Span stats resource
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ProjectStats_Public'
  /v1/private/spans/feedback-scores:
    put:
      tags:
      - Spans
      summary: Batch feedback scoring for spans
      description: Batch feedback scoring for spans
      operationId: scoreBatchOfSpans
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/FeedbackScoreBatch'
      responses:
        '204':
          description: No Content
  /v1/private/spans/search:
    post:
      tags:
      - Spans
      summary: Search spans
      description: Search spans
      operationId: searchSpans
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/SpanSearchStreamRequest_Public'
      responses:
        '200':
          description: Spans stream or error during process
          content:
            application/octet-stream:
              schema:
                maxItems: 2000
                type: array
                items:
                  type: string
                  anyOf:
                  - $ref: '#/components/schemas/Span_Public'
                  - $ref: '#/components/schemas/ErrorMessage_Public'
        '400':
          description: Bad Request
          content:
            application/octet-stream:
              schema:
                $ref: '#/components/schemas/ErrorMessage_Public'
  /v1/private/spans/exists:
    get:
      tags:
      - Spans
      summary: Check whether a project has spans
      description: Returns whether the project has at least one span matching the given scope. Cheap existence probe (LIMIT 1) used to drive empty-state decisions without scanning or aggregating the whole project.
      operationId: spansExist
      parameters:
      - name: project_id
        in: query
        schema:
          type: string
          format: uuid
      - name: project_name
        in: query
        schema:
          type: string
      - name: source
        in: query
        schema:
          type: string
          description: Restrict the probe to a single ingestion source (e.g. 'sdk' for the Logs empty state), matching the rendered list's logs-source scope. Omit to probe any source.
      responses:
        '200':
          description: Span existence
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ExistenceResponse'
  /v1/private/spans/comments/{commentId}:
    patch:
      tags:
      - Spans
      summary: Update span comment by id
      description: Update span comment by id
      operationId: updateSpanComment
      parameters:
      - name: commentId
        in: path
        required: true
        schema:
          type: string
          format: uuid
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/Comment'
      responses:
        '204':
          description: No Content
        '404':
          description: Not found
components:
  schemas:
    Comment_Public:
      required:
      - text
      type: object
      properties:
        id:
          type: string
          format: uuid
          readOnly: true
        text:
          minLength: 1
          type: string
        source_queue_id:
          type: string
          format: uuid
        created_at:
          type: string
          format: date-time
          readOnly: true
        last_updated_at:
          type: string
          format: date-time
          readOnly: true
        created_by:
          type: string
          readOnly: true
        last_updated_by:
          type: string
          readOnly: true
      readOnly: true
    ErrorInfo_Public:
      required:
      - exception_type
      - traceback
      type: object
      properties:
        exception_type:
          minLength: 1
          type: string
        message:
          type: string
        traceback:
          minLength: 1
          type: string
    SpanBatchUpdate:
      required:
      - ids
      - update
      type: object
      properties:
        ids:
          maxItems: 1000
          minItems: 1
          uniqueItems: true
          type: array
          description: List of span IDs to update (max 1000)
          items:
            type: string
            description: List of span IDs to update (max 1000)
            format: uuid
        update:
          $ref: '#/components/schemas/SpanUpdate'
        merge_tags:
          type: boolean
          description: 'If true, merge tags with existing tags instead of replacing them. Default: false'
      description: Request to batch update multiple spans
    ScoreName_Public:
      type: object
      properties:
        name:
          type: string
        type:
          type: string
    JsonListString_Write:
      type: object
      anyOf:
      - type: object
      - type: array
        items:
          type: object
      - type: string
    ValueEntry_Public:
      type: object
      properties:
        value:
          type: number
        reason:
          type: string
        category_name:
          type: string
        source:
          type: string
          enum:
          - ui
          - sdk
          - online_scoring
        last_updated_at:
          type: string
          format: date-time
        span_type:
          type: string
        span_id:
          type: string
        source_queue_id:
          type: string
        author:
          type: string
      readOnly: true
    ProjectStatItemObject_Public:
      type: object
      properties:
        name:
          type: string
        type:
          type: string
          enum:
          - COUNT
          - PERCENTAGE
          - AVG
      discriminator:
        propertyName: type
        mapping:
          PERCENTAGE: '#/components/schemas/PercentageValueStat_Public'
          COUNT: '#/components/schemas/CountValueStat_Public'
          AVG: '#/components/schemas/AvgValueStat_Public'
    FeedbackScoreNames_Public:
      type: object
      properties:
        scores:
          type: array
          items:
            $ref: '#/components/schemas/ScoreName_Public'
    ProjectStats_Public:
      type: object
      properties:
        stats:
          type: array
          items:
            $ref: '#/components/schemas/ProjectStatItemObject_Public'
    Span_Write:
      required:
      - start_time
      type: object
      properties:
        id:
          type: string
          format: uuid
        project_name:
          pattern: (?s)^\s*(\S.*\S|\S)\s*$
          type: string
          description: If null, the default project is used
        trace_id:
          type: string
          format: uuid
        parent_span_id:
          type: string
          format: uuid
        name:
          type: string
        type:
          type: string
          enum:
          - general
          - tool
          - llm
          - guardrail
        start_time:
          type: string
          format: date-time
        end_time:
          type: string
          format: date-time
        input:
          $ref: '#/components/schemas/JsonListString_Write'
        output:
          $ref: '#/components/schemas/JsonListString_Write'
        metadata:
          $ref: '#/components/schemas/JsonListString_Write'
        model:
          type: string
        provider:
          type: string
        tags:
          uniqueItems: true
          type: array
          items:
            type: string
        usage:
          type: object
          additionalProperties:
            type: integer
            format: int32
        error_info:
          $ref: '#/components/schemas/ErrorInfo_Write'
        last_updated_at:
          type: string
          format: date-time
        total_estimated_cost:
          minimum: 0.0
          exclusiveMinimum: false
          type: number
        total_estimated_cost_version:
          type: string
        ttft:
          type: number
          description: Time to first token in milliseconds
          format: double
        source:
          type: string
          enum:
          - sdk
          - experiment
          - playground
          - optimization
          - evaluator
        environment:
          maxLength: 150
          minLength: 0
          type: string
    ErrorInfo:
      required:
      - exception_type
      - traceback
      type: object
      properties:
        exception_type:
          minLength: 1
          type: string
        message:
          type: string
        traceback:
          minLength: 1
          type: string
    ExistenceResponse:
      type: object
      properties:
        exists:
          type: boolean
          description: Whether the project has at least one matching entity for the given scope
    BatchDelete:
      required:
      - ids
      type: object
      properties:
        ids:
          maxItems: 1000
          minItems: 1
          uniqueItems: true
          type: array
          items:
            type: string
            format: uuid
    SpanSearchStreamRequest_Public:
      type: object
      properties:
        trace_id:
          type: string
          format: uuid
        project_name:
          type: string
        project_id:
          type: string
          format: uuid
        type:
          type: string
          enum:
          - general
          - tool
          - llm
          - guardrail
        filters:
          type: array
          items:
            $ref: '#/components/schemas/SpanFilter_Public'
        limit:
          maximum: 2000
          minimum: 1
          type: integer
          description: Max number of spans to be streamed
          format: int32
          default: 500
        last_retrieved_id:
          type: string
          format: uuid
        truncate:
          type: boolean
          description: Truncate image included in either input, output or metadata
          default: true
        exclude:
          uniqueItems: true
          type: array
          description: Fields to exclude from the response
          items:
            type: string
            description: Fields to exclude from the response
            enum:
            - name
            - type
            - start_time
            - end_time
            - input
            - output
            - metadata
            - model
            - provider
            - tags
            - usage
            - error_info
            - created_at
            - created_by
            - last_updated_by
            - feedback_scores
            - comments
            - total_estimated_cost
            - total_estimated_cost_version
            - duration
            - ttft
            - source
            - environment
        from_time:
          type: string
          description: Filter spans created from this time (ISO-8601 format).
          format: date-time
        to_time:
          type: string
          description: Filter spans created up to this time (ISO-8601 format). If not provided, defaults to current time. Must be after 'from_time'.
          format: date-time
    SpanUpdate:
      required:
      - trace_id
      type: object
      properties:
        project_name:
          pattern: (?s)^\s*(\S.*\S|\S)\s*$
          type: string
          description: If null and project_id not specified, Default Project is assumed
        project_id:
          type: string
          description: If null and project_name not specified, Default Project is assumed
          format: uuid
        trace_id:
          type: string
          format: uuid
        parent_span_id:
          type: string
          format: uuid
        name:
          type: string
        type:
          type: string
          enum:
          - general
          - tool
          - llm
          - guardrail
        end_time:
          type: string
          format: date-time
        input:
          $ref: '#/components/schemas/JsonListString'
        output:
          $ref: '#/components/schemas/JsonListString'
        metadata:
          $ref: '#/components/schemas/JsonListString'
        model:
          type: string
        provider:
          type: string
        tags:
          maxItems: 50
          minItems: 0
          uniqueItems: true
          type: array
          description: Tags
          items:
            maxLength: 100
            minLength: 0
            type: string
            description: Tags
        tags_to_add:
          maxItems: 50
          minItems: 0
          uniqueItems: true
          type: array
          description: Tags to add
          items:
            maxLength: 100
            minLength: 0
            type: string
            description: Tags to add
        tags_to_remove:
          maxItems: 50
          minItems: 0
          uniqueItems: true
          type: array
          description: Tags to remove
          items:
            maxLength: 100
            minLength: 0
            type: string
            description: Tags to remove
        usage:
          type: object
          additionalProperties:
            type: integer
            format: int32
        total_estimated_cost:
          minimum: 0.0
          exclusiveMinimum: false
          type: number
        error_info:
          $ref: '#/components/schemas/ErrorInfo'
        ttft:
          type: number
          format: double
        source:
          type: string
          enum:
          - sdk
          - experiment
          - playground
          - optimization
          - evaluator
        environment:
          maxLength: 150
          minLength: 0
          type: string
    ErrorMessage_Public:
      type: object
      properties:
        code:
          type: integer
          format: int32
        message:
          type: string
        details:
          type: string
    DeleteFeedbackScore:
      required:
      - name
      type: object
      properties:
        name:
          minLength: 1
          type: string
        author:
          type: string
        source_queue_id:
          type: string
          format: uuid
    FeedbackScoreBatch:
      required:
      - scores
      type: object
      properties:
        scores:
          maxItems: 1000
          minItems: 1
          type: array
          items:
            $ref: '#/components/schemas/FeedbackScoreBatchItem'
    Span_Public:
      required:
      - start_time
      type: object
      properties:
        id:
          type: string
          format: uuid
        project_name:
          pattern: (?s)^\s*(\S.*\S|\S)\s*$
          type: string
          description: If null, the default project is used
        project_id:
          type: string
          format: uuid
          readOnly: true
        trace_id:
          type: string
          format: uuid
        parent_span_id:
          type: string
          format: uuid
        name:
          type: string
        type:
          type: string
          enum:
          - general
          - tool
          - llm
          - guardrail
        start_time:
          type: string
          format: date-time
        end_time:
          type: string
          format: date-time
        input:
          $ref: '#/components/schemas/JsonListString_Public'
        output:
          $ref: '#/components/schemas/JsonListString_Public'
        metadata:
          $ref: '#/components/schemas/JsonListString_Public'
        model:
          type: string
        provider:
          type: string
        tags:
          uniqueItems: true
          type: array
          items:
            type: string
        usage:
          type: object
          additionalProperties:
            type: integer
            format: int32
        error_info:
          $ref: '#/components/schemas/ErrorInfo_Public'
        created_at:
          type: string
          format: date-time
          readOnly: true
        last_updated_at:
          type: string
          format: date-time
        created_by:
          type: string
          readOnly: true
        last_updated_by:
          type: string
          readOnly: true
        feedback_scores:
          type: array
          readOnly: true
          items:
            $ref: '#/components/schemas/FeedbackScore_Public'
        comments:
          type: array
          readOnly: true
          items:
            $ref: '#/components/schemas/Comment_Public'
        total_estimated_cost:
          minimum: 0.0
          exclusiveMinimum: false
          type: number
        total_estimated_cost_version:
          type: string
        duration:
          type: number
          description: Duration in milliseconds as a decimal number to support sub-millisecond precision
          format: double
          readOnly: true
        ttft:
          type: number
          description: Time to first token in milliseconds
          format: double
        source:
          type: string
          enum:
          - sdk
          - experiment
          - playground
          - optimization
          - evaluator
        environment:
          maxLength: 150
          minLength: 0
          type: string
    ValueEntry:
      type: object
      properties:
        value:
          type: number
        reason:
          type: string
        category_name:
          type: string
        source:
          type: string
          enum:
          - ui
          - sdk
          - online_scoring
        last_updated_at:
          type: string
          format: date-time
        span_type:
          type: string
        span_id:
          type: string
        source_queue_id:
          type: string
        author:
          type: string
      readOnly: true
    ErrorInfo_Write:
      required:
      - exception_type
      - traceback
      type: object
      properties:
        exception_type:
          minLength: 1
          type: string
        message:
          type: string
        traceback:
          minLength: 1
          type: string
    FeedbackScore_Public:
      required:
      - name
      - source
      - value
      type: object
      properties:
        name:
          minLength: 1
          type: string
        category_name:
          type: string
        value:
          maximum: 1000000000.0
          exclusiveMaximum: false
          minimum: -1000000000.0
          exclusiveMinimum: false
          type: number
        reason:
          type: string
        source:
          type: string
          enum:
          - ui
          - sdk
          - online_scoring
        source_queue_id:
          type: string
          format: uuid
        created_at:
          type: string
          format: date-time
          readOnly: true
        last_updated_at:
          type: string
          format: date-time
          readOnly: true
        created_by:
          type: string
          readOnly: true
        last_updated_by:
          type: string
          readOnly: true
        value_by_author:
          type: object
          additionalProperties:
            $ref: '#/components/schemas/ValueEntry_Public'
          readOnly: true
      description: Aggregated feedback scores from all spans in this trace, averaged by score name
      readOnly: true
    JsonListString:
      type: object
      anyOf:
      - type: object
      - type: array
        items:
          type: object
      - type: string
    JsonListString_Public:
      type: object
      anyOf:
      - type: object
      - type: array
        it

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# Full source: https://raw.githubusercontent.com/api-evangelist/comet/refs/heads/main/openapi/comet-spans-api-openapi.yml