> ## 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.

# Create calibration drift

> Requires scopes: runs:write



## OpenAPI

````yaml /api-reference/openapi.json post /api/calibration/mappings/{mappingVersionId}/drift
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/calibration/mappings/{mappingVersionId}/drift:
    post:
      tags:
        - calibration
      summary: Create calibration drift
      description: 'Requires scopes: runs:write'
      operationId: post_calibration_mappings_mappingVersionId_drift
      parameters:
        - name: mappingVersionId
          in: path
          required: true
          schema:
            type: string
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: >-
                #/components/schemas/PostApiCalibrationMappingsMappingVersionIdDriftRequest
      responses:
        '201':
          description: Successful response
          content:
            application/json:
              schema:
                $ref: >-
                  #/components/schemas/PostApiCalibrationMappingsMappingVersionIdDriftResponse201ApplicationJson
        '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:write
components:
  schemas:
    PostApiCalibrationMappingsMappingVersionIdDriftRequest:
      type: object
      properties:
        observations:
          type: array
          items:
            type: object
            properties:
              rawScore:
                type: number
              anchorKey:
                type: string
              parseOk:
                oneOf:
                  - type: boolean
                    enum:
                      - false
                  - type: boolean
                    enum:
                      - true
            additionalProperties: false
            required:
              - rawScore
              - anchorKey
        thresholds:
          type: object
          properties:
            meanShift:
              type: number
            agreementDrop:
              type: number
            correlationDrop:
              type: number
            parseFailureIncrease:
              type: number
          additionalProperties: false
      additionalProperties: false
      required:
        - observations
    PostApiCalibrationMappingsMappingVersionIdDriftResponse201ApplicationJson:
      type: object
      properties:
        status:
          oneOf:
            - type: string
              enum:
                - block
            - type: string
              enum:
                - stable
            - type: string
              enum:
                - warning
        metrics:
          type: object
          additionalProperties:
            oneOf:
              - type: 'null'
              - type: number
        reasons:
          type: array
          items:
            type: string
        event:
          type: object
          properties:
            status:
              type: string
            id:
              type: string
            createdAt:
              type: string
              format: date-time
            organizationId:
              $ref: '#/components/schemas/OrganizationId'
            createdBy:
              type: string
            mappingVersionId:
              type: string
            baselineMappingVersionId:
              oneOf:
                - type: 'null'
                - type: string
            observationHash:
              type: string
            sampleSize:
              type: number
            metrics:
              type: object
              additionalProperties:
                oneOf:
                  - type: 'null'
                  - type: number
            thresholds:
              type: object
              additionalProperties:
                type: number
          additionalProperties: false
          required:
            - status
            - id
            - createdAt
            - organizationId
            - createdBy
            - mappingVersionId
            - baselineMappingVersionId
            - observationHash
            - sampleSize
            - metrics
            - thresholds
      additionalProperties: false
      required:
        - status
        - metrics
        - reasons
        - event
    OrganizationId:
      type: string
      format: uuid
    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

````