Arize Phoenix spans API

openapi: 3.2.0
info:
  title: Arize-Phoenix REST annotation_configs Spans API
  description: Schema for Arize-Phoenix REST API
  version: '1.0'
servers:
- url: https://app.phoenix.arize.com
  description: Base URL declared by the provider in apis.yml (roadmap#122).
tags:
- name: spans
paths:
  /v1/projects/{project_identifier}/spans/otlpv1:
    get:
      tags:
      - spans
      summary: Search spans with simple filters (no DSL)
      description: Return spans within a project filtered by time range. Supports cursor-based pagination.
      operationId: spanSearch
      parameters:
      - name: project_identifier
        in: path
        required: true
        schema:
          type: string
          description: 'The project identifier: either project ID or project name. If using a project name, it cannot contain slash (/), question mark (?), or pound sign (#) characters.'
          title: Project Identifier
        description: 'The project identifier: either project ID or project name. If using a project name, it cannot contain slash (/), question mark (?), or pound sign (#) characters.'
      - name: cursor
        in: query
        required: false
        schema:
          type:
          - string
          - 'null'
          description: Pagination cursor (Span Global ID)
          title: Cursor
        description: Pagination cursor (Span Global ID)
      - name: limit
        in: query
        required: false
        schema:
          type: integer
          maximum: 1000
          exclusiveMinimum: 0
          description: Maximum number of spans to return
          default: 100
          title: Limit
        description: Maximum number of spans to return
      - name: start_time
        in: query
        required: false
        schema:
          type:
          - string
          - 'null'
          format: date-time
          description: Inclusive lower bound time
          title: Start Time
        description: Inclusive lower bound time
      - name: end_time
        in: query
        required: false
        schema:
          type:
          - string
          - 'null'
          format: date-time
          description: Exclusive upper bound time
          title: End Time
        description: Exclusive upper bound time
      - name: trace_id
        in: query
        required: false
        schema:
          type:
          - array
          - 'null'
          items:
            type: string
          description: Filter by one or more trace IDs
          title: Trace Id
        description: Filter by one or more trace IDs
      - name: parent_id
        in: query
        required: false
        schema:
          type:
          - string
          - 'null'
          description: Filter by parent span ID. Use "null" to get root spans only.
          title: Parent Id
        description: Filter by parent span ID. Use "null" to get root spans only.
      - name: name
        in: query
        required: false
        schema:
          type:
          - array
          - 'null'
          items:
            type: string
          description: Filter by span name(s)
          title: Name
        description: Filter by span name(s)
      - name: status_code
        in: query
        required: false
        schema:
          type:
          - array
          - 'null'
          items:
            type: string
          description: 'Filter by status code(s). Values: OK, ERROR, UNSET'
          title: Status Code
        description: 'Filter by status code(s). Values: OK, ERROR, UNSET'
      - name: attribute
        in: query
        required: false
        schema:
          type:
          - array
          - 'null'
          items:
            type: string
          description: 'Filter spans by `key:value`. Key is a dot-path (e.g. `user.id`, `metadata.tier`). Value is JSON-parsed: `k:12345` is int, `k:true` is bool, otherwise string (`k:user-42`). To match a numeric- or boolean-looking STRING, JSON-quote it: `user.id:"12345"` (URL-encoded `%2212345%22`). Split is on the first `:` only, so values may contain colons (`session.id:sess:abc:123`, ISO timestamps). Repeat the param to AND filters. List-valued attributes (e.g. `tag.tags`) cannot be matched here. Returns 422 on malformed input (missing colon, empty key/value, or list/dict/null value).'
          title: Attribute
        description: 'Filter spans by `key:value`. Key is a dot-path (e.g. `user.id`, `metadata.tier`). Value is JSON-parsed: `k:12345` is int, `k:true` is bool, otherwise string (`k:user-42`). To match a numeric- or boolean-looking STRING, JSON-quote it: `user.id:"12345"` (URL-encoded `%2212345%22`). Split is on the first `:` only, so values may contain colons (`session.id:sess:abc:123`, ISO timestamps). Repeat the param to AND filters. List-valued attributes (e.g. `tag.tags`) cannot be matched here. Returns 422 on malformed input (missing colon, empty key/value, or list/dict/null value).'
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/OtlpSpansResponseBody'
        '403':
          content:
            text/plain:
              schema:
                type: string
          description: Forbidden
        '404':
          content:
            text/plain:
              schema:
                type: string
          description: Not Found
        '422':
          content:
            text/plain:
              schema:
                type: string
          description: Unprocessable Entity
  /v1/projects/{project_identifier}/spans:
    get:
      tags:
      - spans
      summary: List spans with simple filters (no DSL)
      description: Return spans within a project filtered by time range. Supports cursor-based pagination.
      operationId: getSpans
      parameters:
      - name: project_identifier
        in: path
        required: true
        schema:
          type: string
          description: 'The project identifier: either project ID or project name. If using a project name, it cannot contain slash (/), question mark (?), or pound sign (#) characters.'
          title: Project Identifier
        description: 'The project identifier: either project ID or project name. If using a project name, it cannot contain slash (/), question mark (?), or pound sign (#) characters.'
      - name: cursor
        in: query
        required: false
        schema:
          type:
          - string
          - 'null'
          description: Pagination cursor (Span Global ID)
          title: Cursor
        description: Pagination cursor (Span Global ID)
      - name: limit
        in: query
        required: false
        schema:
          type: integer
          maximum: 1000
          exclusiveMinimum: 0
          description: Maximum number of spans to return
          default: 100
          title: Limit
        description: Maximum number of spans to return
      - name: start_time
        in: query
        required: false
        schema:
          type:
          - string
          - 'null'
          format: date-time
          description: Inclusive lower bound time
          title: Start Time
        description: Inclusive lower bound time
      - name: end_time
        in: query
        required: false
        schema:
          type:
          - string
          - 'null'
          format: date-time
          description: Exclusive upper bound time
          title: End Time
        description: Exclusive upper bound time
      - name: trace_id
        in: query
        required: false
        schema:
          type:
          - array
          - 'null'
          items:
            type: string
          description: Filter by one or more trace IDs
          title: Trace Id
        description: Filter by one or more trace IDs
      - name: parent_id
        in: query
        required: false
        schema:
          type:
          - string
          - 'null'
          description: Filter by parent span ID. Use "null" to get root spans only.
          title: Parent Id
        description: Filter by parent span ID. Use "null" to get root spans only.
      - name: name
        in: query
        required: false
        schema:
          type:
          - array
          - 'null'
          items:
            type: string
          description: Filter by span name(s)
          title: Name
        description: Filter by span name(s)
      - name: span_kind
        in: query
        required: false
        schema:
          type:
          - array
          - 'null'
          items:
            type: string
          description: 'Filter by span kind(s). Values: LLM, CHAIN, TOOL, RETRIEVER, EMBEDDING, AGENT, RERANKER, GUARDRAIL, EVALUATOR, UNKNOWN'
          title: Span Kind
        description: 'Filter by span kind(s). Values: LLM, CHAIN, TOOL, RETRIEVER, EMBEDDING, AGENT, RERANKER, GUARDRAIL, EVALUATOR, UNKNOWN'
      - name: status_code
        in: query
        required: false
        schema:
          type:
          - array
          - 'null'
          items:
            type: string
          description: 'Filter by status code(s). Values: OK, ERROR, UNSET'
          title: Status Code
        description: 'Filter by status code(s). Values: OK, ERROR, UNSET'
      - name: attribute
        in: query
        required: false
        schema:
          type:
          - array
          - 'null'
          items:
            type: string
          description: 'Filter spans by `key:value`. Key is a dot-path (e.g. `user.id`, `metadata.tier`). Value is JSON-parsed: `k:12345` is int, `k:true` is bool, otherwise string (`k:user-42`). To match a numeric- or boolean-looking STRING, JSON-quote it: `user.id:"12345"` (URL-encoded `%2212345%22`). Split is on the first `:` only, so values may contain colons (`session.id:sess:abc:123`, ISO timestamps). Repeat the param to AND filters. List-valued attributes (e.g. `tag.tags`) cannot be matched here. Returns 422 on malformed input (missing colon, empty key/value, or list/dict/null value).'
          title: Attribute
        description: 'Filter spans by `key:value`. Key is a dot-path (e.g. `user.id`, `metadata.tier`). Value is JSON-parsed: `k:12345` is int, `k:true` is bool, otherwise string (`k:user-42`). To match a numeric- or boolean-looking STRING, JSON-quote it: `user.id:"12345"` (URL-encoded `%2212345%22`). Split is on the first `:` only, so values may contain colons (`session.id:sess:abc:123`, ISO timestamps). Repeat the param to AND filters. List-valued attributes (e.g. `tag.tags`) cannot be matched here. Returns 422 on malformed input (missing colon, empty key/value, or list/dict/null value).'
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/SpansResponseBody'
        '403':
          content:
            text/plain:
              schema:
                type: string
          description: Forbidden
        '404':
          content:
            text/plain:
              schema:
                type: string
          description: Not Found
        '422':
          content:
            text/plain:
              schema:
                type: string
          description: Unprocessable Entity
    post:
      tags:
      - spans
      summary: Create spans
      description: Submit spans to be inserted into a project. If any spans are invalid or duplicates, no spans will be inserted.
      operationId: createSpans
      parameters:
      - name: project_identifier
        in: path
        required: true
        schema:
          type: string
          description: 'The project identifier: either project ID or project name. If using a project name, it cannot contain slash (/), question mark (?), or pound sign (#) characters.'
          title: Project Identifier
        description: 'The project identifier: either project ID or project name. If using a project name, it cannot contain slash (/), question mark (?), or pound sign (#) characters.'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/CreateSpansRequestBody'
      responses:
        '202':
          description: Successful Response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/CreateSpansResponseBody'
        '403':
          content:
            text/plain:
              schema:
                type: string
          description: Forbidden
        '404':
          content:
            text/plain:
              schema:
                type: string
          description: Not Found
        '400':
          content:
            text/plain:
              schema:
                type: string
          description: Bad Request
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
  /v1/span_annotations:
    post:
      tags:
      - spans
      summary: Create span annotations
      operationId: annotateSpans
      parameters:
      - name: sync
        in: query
        required: false
        schema:
          type: boolean
          description: If true, fulfill request synchronously.
          default: false
          title: Sync
        description: If true, fulfill request synchronously.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/AnnotateSpansRequestBody'
      responses:
        '200':
          description: Span annotations inserted successfully
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/AnnotateSpansResponseBody'
        '403':
          content:
            text/plain:
              schema:
                type: string
          description: Forbidden
        '404':
          content:
            text/plain:
              schema:
                type: string
          description: Span not found
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
  /v1/span_notes:
    post:
      tags:
      - spans
      summary: Create a span note
      description: Add a note annotation to a span. By default each call appends a new note with an auto-generated UUIDv4 identifier, so multiple notes accumulate on the same span. Callers may supply a non-empty `identifier` to upsert on (span_id, name='note', identifier) — repeated calls with the same identifier overwrite the existing note, matching the semantics of structured annotations.
      operationId: createSpanNote
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/CreateSpanNoteRequestBody'
        required: true
      responses:
        '200':
          description: Span note created successfully
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/CreateSpanNoteResponseBody'
        '403':
          description: Forbidden
          content:
            text/plain:
              schema:
                type: string
        '404':
          description: Span not found
          content:
            text/plain:
              schema:
                type: string
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
  /v1/spans/{span_identifier}:
    delete:
      tags:
      - spans
      summary: Delete a span by span_identifier
      description: "Delete a single span by identifier.\n\n        **Important**: This operation deletes ONLY the specified span itself and does NOT\n        delete its descendants/children. All child spans will remain in the trace and\n        become orphaned (their parent_id will point to a non-existent span).\n\n        Behavior:\n        - Deletes only the target span (preserves all descendant spans)\n        - If this was the last span in the trace, the trace record is also deleted\n        - If the deleted span had a parent, its cumulative metrics (error count, token counts)\n          are subtracted from all ancestor spans in the chain\n\n        **Note**: This operation is irreversible and may create orphaned spans."
      operationId: deleteSpan
      parameters:
      - name: span_identifier
        in: path
        required: true
        schema:
          type: string
          description: 'The span identifier: either a relay GlobalID or OpenTelemetry span_id'
          title: Span Identifier
        description: 'The span identifier: either a relay GlobalID or OpenTelemetry span_id'
      responses:
        '204':
          description: Successful Response
        '403':
          content:
            text/plain:
              schema:
                type: string
          description: Forbidden
        '404':
          content:
            text/plain:
              schema:
                type: string
          description: Not Found
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
  /v1/document_annotations:
    post:
      tags:
      - spans
      summary: Annotate Span Documents
      operationId: annotateSpanDocuments
      parameters:
      - name: sync
        in: query
        required: false
        schema:
          type: boolean
          description: If set to true, the annotations are inserted synchronously.
          default: false
          title: Sync
        description: If set to true, the annotations are inserted synchronously.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/AnnotateSpanDocumentsRequestBody'
      responses:
        '200':
          description: Span document annotation inserted successfully
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/AnnotateSpanDocumentsResponseBody'
        '403':
          content:
            text/plain:
              schema:
                type: string
          description: Forbidden
        '404':
          content:
            text/plain:
              schema:
                type: string
          description: Span not found
        '422':
          content:
            text/plain:
              schema:
                type: string
          description: Invalid request - non-empty identifier not supported
components:
  schemas:
    InsertedSpanDocumentAnnotation:
      properties:
        id:
          type: string
          title: Id
          description: The ID of the inserted span document annotation
      type: object
      required:
      - id
      title: InsertedSpanDocumentAnnotation
    OtlpKind:
      type: string
      enum:
      - SPAN_KIND_UNSPECIFIED
      - SPAN_KIND_INTERNAL
      - SPAN_KIND_SERVER
      - SPAN_KIND_CLIENT
      - SPAN_KIND_PRODUCER
      - SPAN_KIND_CONSUMER
      title: OtlpKind
    AnnotateSpansResponseBody:
      properties:
        data:
          items:
            $ref: '#/components/schemas/InsertedSpanAnnotation'
          type: array
          title: Data
      type: object
      required:
      - data
      title: AnnotateSpansResponseBody
    OtlpAnyValue:
      properties:
        array_value:
          $ref: '#/components/schemas/OtlpArrayValue'
        bool_value:
          type:
          - boolean
          - 'null'
          title: Bool Value
        bytes_value:
          type:
          - string
          - 'null'
          pattern: ^[A-Za-z0-9+/]*={0,2}$
          title: Bytes Value
        double_value:
          anyOf:
          - type: number
          - $ref: '#/components/schemas/OtlpDoubleValue'
          - type: string
          - type: 'null'
          title: Double Value
        int_value:
          anyOf:
          - type: integer
            exclusiveMaximum: 9.223372036854776e+18
            minimum: -9.223372036854776e+18
          - type: string
            pattern: ^-?[0-9]+$
          - type: 'null'
          title: Int Value
        kvlist_value:
          type: 'null'
          title: Kvlist Value
        string_value:
          type:
          - string
          - 'null'
          title: String Value
      additionalProperties: false
      type: object
      title: OtlpAnyValue
    OtlpKeyValue:
      properties:
        key:
          type:
          - string
          - 'null'
          title: Key
        value:
          $ref: '#/components/schemas/OtlpAnyValue'
      additionalProperties: false
      type: object
      title: OtlpKeyValue
    OtlpSpan:
      properties:
        attributes:
          items:
            $ref: '#/components/schemas/OtlpKeyValue'
          type:
          - array
          - 'null'
          title: Attributes
          description: "attributes is a collection of key/value pairs. Note, global attributes like server name can be set using the resource API. Examples of attributes:\n\n    \"/http/user_agent\": \"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 Safari/537.36\"\n    \"/http/server_latency\": 300\n    \"example.com/myattribute\": true\n    \"example.com/score\": 10.239\n\nThe OpenTelemetry API specification further restricts the allowed value types:\nhttps://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/common/README.md#attribute\nAttribute keys MUST be unique (it is not allowed to have more than one attribute with the same key)."
        dropped_attributes_count:
          type:
          - integer
          - 'null'
          maximum: 4294967295.0
          minimum: 0.0
          title: Dropped Attributes Count
          description: dropped_attributes_count is the number of attributes that were discarded. Attributes can be discarded because their keys are too long or because there are too many attributes. If this value is 0, then no attributes were dropped.
        dropped_events_count:
          type:
          - integer
          - 'null'
          maximum: 4294967295.0
          minimum: 0.0
          title: Dropped Events Count
          description: dropped_events_count is the number of dropped events. If the value is 0, then no events were dropped.
        dropped_links_count:
          type:
          - integer
          - 'null'
          maximum: 4294967295.0
          minimum: 0.0
          title: Dropped Links Count
          description: dropped_links_count is the number of dropped links after the maximum size was enforced. If this value is 0, then no links were dropped.
        end_time_unix_nano:
          anyOf:
          - type: integer
            exclusiveMaximum: 1.8446744073709552e+19
            minimum: 0.0
          - type: string
            pattern: ^[0-9]+$
          - type: 'null'
          title: End Time Unix Nano
          description: 'end_time_unix_nano is the end time of the span. On the client side, this is the time kept by the local machine where the span execution ends. On the server side, this is the time when the server application handler stops running.

            Value is UNIX Epoch time in nanoseconds since 00:00:00 UTC on 1 January 1970.


            This field is semantically required and it is expected that end_time >= start_time.'
        events:
          items:
            $ref: '#/components/schemas/OtlpEvent'
          type:
          - array
          - 'null'
          title: Events
          description: events is a collection of Event items. A span with no events is valid.
        flags:
          type:
          - integer
          - 'null'
          maximum: 4294967295.0
          minimum: 0.0
          title: Flags
          description: 'Flags, a bit field.


            Bits 0-7 (8 least significant bits) are the trace flags as defined in W3C Trace Context specification. To read the 8-bit W3C trace flag, use `flags & SPAN_FLAGS_TRACE_FLAGS_MASK`.


            See https://www.w3.org/TR/trace-context-2/#trace-flags for the flag definitions.


            Bits 8 and 9 represent the 3 states of whether a span''s parent is remote. The states are (unknown, is not remote, is remote).

            To read whether the value is known, use `(flags & SPAN_FLAGS_CONTEXT_HAS_IS_REMOTE_MASK) != 0`.

            To read whether the span is remote, use `(flags & SPAN_FLAGS_CONTEXT_IS_REMOTE_MASK) != 0`.


            When creating span messages, if the message is logically forwarded from another source with an equivalent flags fields (i.e., usually another OTLP span message), the field SHOULD be copied as-is. If creating from a source that does not have an equivalent flags field (such as a runtime representation of an OpenTelemetry span), the high 22 bits MUST be set to zero.

            Readers MUST NOT assume that bits 10-31 (22 most significant bits) will be zero.


            [Optional].'
        kind:
          anyOf:
          - $ref: '#/components/schemas/OtlpKind'
          - type: integer
            maximum: 2147483647.0
            minimum: -2147483648.0
          - type: 'null'
          title: Kind
          description: Distinguishes between spans generated in a particular context. For example, two spans with the same name may be distinguished using `CLIENT` (caller) and `SERVER` (callee) to identify queueing latency associated with the span.
          default: SPAN_KIND_INTERNAL
        links:
          type: 'null'
          title: Links
        name:
          type:
          - string
          - 'null'
          title: Name
          description: 'A description of the span''s operation.


            For example, the name can be a qualified method name or a file name and a line number where the operation is called. A best practice is to use the same display name at the same call point in an application. This makes it easier to correlate spans in different traces.


            This field is semantically required to be set to non-empty string. Empty value is equivalent to an unknown span name.


            This field is required.'
        parent_span_id:
          type:
          - string
          - 'null'
          pattern: ^[A-Za-z0-9+/]*={0,2}$
          title: Parent Span Id
          description: The `span_id` of this span's parent span. If this is a root span, then this field must be empty. The ID is an 8-byte array.
        span_id:
          type:
          - string
          - 'null'
          pattern: ^[A-Za-z0-9+/]*={0,2}$
          title: Span Id
          description: 'A unique identifier for a span within a trace, assigned when the span is created. The ID is an 8-byte array. An ID with all zeroes OR of length other than 8 bytes is considered invalid (empty string in OTLP/JSON is zero-length and thus is also invalid).


            This field is required.'
        start_time_unix_nano:
          anyOf:
          - type: integer
            exclusiveMaximum: 1.8446744073709552e+19
            minimum: 0.0
          - type: string
            pattern: ^[0-9]+$
          - type: 'null'
          title: Start Time Unix Nano
          description: 'start_time_unix_nano is the start time of the span. On the client side, this is the time kept by the local machine where the span execution starts. On the server side, this is the time when the server''s application handler starts running.

            Value is UNIX Epoch time in nanoseconds since 00:00:00 UTC on 1 January 1970.


            This field is semantically required and it is expected that end_time >= start_time.'
        status:
          $ref: '#/components/schemas/OtlpStatus'
          description: An optional final status for this span. Semantically when Status isn't set, it means span's status code is unset, i.e. assume STATUS_CODE_UNSET (code = 0).
        trace_id:
          type:
          - string
          - 'null'
          pattern: ^[A-Za-z0-9+/]*={0,2}$
          title: Trace Id
          description: 'A unique identifier for a trace. All spans from the same trace share the same `trace_id`. The ID is a 16-byte array. An ID with all zeroes OR of length other than 16 bytes is considered invalid (empty string in OTLP/JSON is zero-length and thus is also invalid).


            This field is required.'
        trace_state:
          type:
          - string
          - 'null'
          title: Trace State
          description: 'trace_state conveys information about request position in multiple distributed tracing graphs. It is a trace_state in w3c-trace-context format: https://www.w3.org/TR/trace-context/#tracestate-header

            See also https://github.com/w3c/distributed-tracing for more details about this field.'
      additionalProperties: false
      type: object
      title: OtlpSpan
    AnnotateSpanDocumentsRequestBody:
      properties:
        data:
          items:
            $ref: '#/components/schemas/SpanDocumentAnnotationData'
          type: array
          title: Data
      type: object
      required:
      - data
      title: AnnotateSpanDocumentsRequestBody
    SpanAnnotationData:
      properties:
        name:
          type: string
          title: Name
          description: The name of the annotation
        annotator_kind:
          type: string
          enum:
          - LLM
          - CODE
          - HUMAN
          title: Annotator Kind
          description: The kind of annotator used for the annotation
        result:
          $ref: '#/components/schemas/AnnotationResult'
          description: The result of the annotation
        metadata:
          additionalProperties: true
          type:
          - object
          - 'null'
          title: Metadata
          description: Metadata for the annotation
        identifier:
          type: string
          title: Identifier
          description: The identifier of the annotation. If provided, the annotation will be updated if it already exists.
          default: ''
        span_id:
          type: string
          title: Span Id
          description: OpenTelemetry Span ID (hex format w/o 0x prefix)
      type: object
      required:
      - name
      - annotator_kind
      - span_id
      title: SpanAnnotationData
    OtlpSpansResponseBody:
      properties:
        data:
          items:
            $ref: '#/components/schemas/OtlpSpan'
          type: array
          title: Data
        next_cursor:
          type:
          - string
          - 'null'
          title: Next Cursor
      type: object
      required:
      - data
      - next_cursor
      title: OtlpSpansResponseBody
      description: Paginated response where each span follows OTLP JSON structure.
    SpanContext:
      properties:
        trace_id:
          type: string
          title: Trace Id
          description: OpenTelemetry trace ID
        span_id:
          type: string
          title: Span Id
          description: OpenTelemetry span ID
      type: object
      required:
      - trace_id
      - span_id
      title: SpanContext
      examples:
      - span_id: 1a2b3c4d5e6f7a8b
        trace_id: a1b2c3d4e5f6a1b2c3d4e5f6a1b2c3d4
    SpanEvent:
      properties:
        name:
          type: string
          title: Name
          description: Name of the event
        timestamp:
          type: string
          format: date-time
          title: Timestamp
          description: When the event occurred (must be timezone-aware)
        attributes:
          additionalProperties: true
          type: object
          title: Attributes
          description: Event attributes
      type: object
      required:
      - name
      - timestamp
      title: SpanEvent
      examples:
      - attributes:
          exception.message: Connection refused
        name: exception
        timestamp: '2024-01-01T12:00:00Z'
    ValidationError:
      properties:
        loc:
          items:
            anyOf:
            - type: string
            - type: integer
          type: array
          title: Location
        msg:
          type: string
          title: Message
        type:
          type: string
          title: Error Type
        input:
          tit

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