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

# Compare hosted and remote trajectories

> Compares completion, latest score, event count, and persisted cost evidence without merging provenance between variants.



## OpenAPI

````yaml /api-reference/openapi.json get /api/trajectory-analysis/compare
openapi: 3.1.0
info:
  title: EvalGate API
  version: 3.7.6
  description: EvalGate API. See docs/api-contract.md for stability commitments.
servers:
  - url: https://evalgate.com
    description: Production
  - url: http://localhost:3000
    description: Local
security: []
paths:
  /api/trajectory-analysis/compare:
    get:
      tags:
        - trajectory analysis
      summary: Compare hosted and remote trajectories
      description: >-
        Compares completion, latest score, event count, and persisted cost
        evidence without merging provenance between variants.
      operationId: compareTrajectoryAnalyses
      parameters:
        - name: baselineId
          in: query
          required: true
          schema:
            type: string
            format: uuid
        - name: candidateId
          in: query
          required: true
          schema:
            type: string
            format: uuid
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                $ref: >-
                  #/components/schemas/GetApiTrajectoryAnalysisCompareResponse200ApplicationJson
        '400':
          $ref: '#/components/responses/ValidationError'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '403':
          $ref: '#/components/responses/Forbidden'
        '404':
          $ref: '#/components/responses/NotFound'
        '409':
          $ref: '#/components/responses/Conflict'
        '429':
          $ref: '#/components/responses/RateLimited'
        '500':
          $ref: '#/components/responses/InternalError'
      security:
        - bearerAuth:
            - runs:read
components:
  schemas:
    GetApiTrajectoryAnalysisCompareResponse200ApplicationJson:
      type: object
      properties:
        baseline:
          type: object
          properties:
            id:
              type: string
            variant:
              type: string
            state:
              oneOf:
                - type: string
                  enum:
                    - complete
                - type: string
                  enum:
                    - incomplete
                - type: string
                  enum:
                    - malformed
            score:
              oneOf:
                - type: 'null'
                - type: number
            eventCount:
              type: number
            costEvidenceCount:
              type: number
          additionalProperties: false
          required:
            - id
            - variant
            - state
            - score
            - eventCount
            - costEvidenceCount
        candidate:
          type: object
          properties:
            id:
              type: string
            variant:
              type: string
            state:
              oneOf:
                - type: string
                  enum:
                    - complete
                - type: string
                  enum:
                    - incomplete
                - type: string
                  enum:
                    - malformed
            score:
              oneOf:
                - type: 'null'
                - type: number
            eventCount:
              type: number
            costEvidenceCount:
              type: number
          additionalProperties: false
          required:
            - id
            - variant
            - state
            - score
            - eventCount
            - costEvidenceCount
        delta:
          type: object
          properties:
            score:
              oneOf:
                - type: 'null'
                - type: number
            events:
              type: number
          additionalProperties: false
          required:
            - score
            - events
      additionalProperties: false
      required:
        - baseline
        - candidate
        - delta
    ApiError:
      type: object
      properties:
        error:
          type: object
          properties:
            code:
              type: string
              enum:
                - UNAUTHORIZED
                - FORBIDDEN
                - NOT_FOUND
                - VALIDATION_ERROR
                - RATE_LIMITED
                - CONFLICT
                - INTERNAL_ERROR
                - SERVICE_UNAVAILABLE
                - QUOTA_EXCEEDED
                - NO_ORG_MEMBERSHIP
                - CROSS_ORG_REFERENCE
                - INCOMPLETE
                - MALFORMED
            message:
              type: string
            details: {}
            requestId:
              type: string
              format: uuid
          required:
            - code
            - message
      required:
        - error
  responses:
    ValidationError:
      description: Validation error
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ApiError'
    Unauthorized:
      description: Unauthorized
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ApiError'
    Forbidden:
      description: Forbidden
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ApiError'
    NotFound:
      description: Resource not found
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ApiError'
    Conflict:
      description: Conflict
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ApiError'
    RateLimited:
      description: Rate limit exceeded
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ApiError'
    InternalError:
      description: Internal server error
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ApiError'
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: API Key or Session Token

````