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

# Start Migration

> Start a migration execution.

Args:
    request: FastAPI request
    migration_id: Migration ID
    start_request: Start options

Returns:
    StartMigrationResponse with task ID



## OpenAPI

````yaml post /v1/namespaces/migrations/{migration_id}/start
openapi: 3.1.0
info:
  title: Mixpeek API
  description: >-
    This is the Mixpeek API, providing access to various endpoints for data
    processing and retrieval.
  termsOfService: https://mixpeek.com/terms
  contact:
    name: Mixpeek Support
    url: https://mixpeek.com/contact
    email: info@mixpeek.com
  version: '0.82'
servers:
  - url: https://api.mixpeek.com
    description: Production
security: []
paths:
  /v1/namespaces/migrations/{migration_id}/start:
    post:
      tags:
        - Namespace Migrations
      summary: Start Migration
      description: |-
        Start a migration execution.

        Args:
            request: FastAPI request
            migration_id: Migration ID
            start_request: Start options

        Returns:
            StartMigrationResponse with task ID
      operationId: start_migration_v1_namespaces_migrations__migration_id__start_post
      parameters:
        - name: migration_id
          in: path
          required: true
          schema:
            type: string
            title: Migration Id
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/StartMigrationRequest'
              default:
                force: false
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/StartMigrationResponse'
        '400':
          description: Bad Request
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '401':
          description: Unauthorized
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '403':
          description: Forbidden
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '404':
          description: Not Found
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
        '500':
          description: Internal Server Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
components:
  schemas:
    StartMigrationRequest:
      properties:
        force:
          type: boolean
          title: Force
          description: Force start even if validation warnings exist
          default: false
      type: object
      title: StartMigrationRequest
      description: Request to start a migration.
    StartMigrationResponse:
      properties:
        migration_id:
          type: string
          title: Migration Id
          description: Migration ID
        status:
          $ref: '#/components/schemas/MigrationStatus'
          description: Current status
        task_id:
          type: string
          title: Task Id
          description: Task ID for tracking migration progress
        started_at:
          type: string
          format: date-time
          title: Started At
          description: Start timestamp
        message:
          type: string
          title: Message
          description: Human-readable message
      type: object
      required:
        - migration_id
        - status
        - task_id
        - started_at
        - message
      title: StartMigrationResponse
      description: Response after starting a migration.
      example:
        message: Migration started successfully. Track progress at GET /migrations/{id}
        migration_id: mig_abc123xyz789
        started_at: '2025-12-03T10:05:00Z'
        status: pending
        task_id: task_xyz789
    ErrorResponse:
      properties:
        success:
          type: boolean
          title: Success
          description: Always false for error responses
          default: false
        status:
          type: integer
          title: Status
          description: HTTP status code for this error
        error:
          $ref: '#/components/schemas/ErrorDetail'
          description: Error details payload
      type: object
      required:
        - status
        - error
      title: ErrorResponse
      description: Error response model.
      examples:
        - error:
            details:
              id: ns_123
              resource: namespace
            message: Namespace not found
            type: NotFoundError
          status: 404
          success: false
    HTTPValidationError:
      properties:
        detail:
          items:
            $ref: '#/components/schemas/ValidationError'
          type: array
          title: Detail
      type: object
      title: HTTPValidationError
    MigrationStatus:
      type: string
      enum:
        - draft
        - validating
        - pending
        - in_progress
        - completed
        - failed
        - cancelled
      title: MigrationStatus
      description: Migration execution status.
    ErrorDetail:
      properties:
        message:
          type: string
          title: Message
          description: Human-readable error message
        type:
          type: string
          title: Type
          description: Stable error type identifier (machine-readable)
        code:
          anyOf:
            - type: string
            - type: 'null'
          title: Code
          description: >-
            Fine-grained error code for programmatic handling (e.g.,
            namespace_name_taken, feature_extractor_not_found). Present only
            when consumers may need to branch on a specific error condition.
        details:
          anyOf:
            - additionalProperties: true
              type: object
            - type: 'null'
          title: Details
          description: >-
            Optional structured details to help debugging (validation errors,
            IDs, etc.)
      type: object
      required:
        - message
        - type
      title: ErrorDetail
      description: Error detail model.
    ValidationError:
      properties:
        loc:
          items:
            anyOf:
              - type: string
              - type: integer
          type: array
          title: Location
        msg:
          type: string
          title: Message
        type:
          type: string
          title: Error Type
      type: object
      required:
        - loc
        - msg
        - type
      title: ValidationError

````