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

# Complete outbound multipart upload and trigger processing

> Combines all uploaded parts into one file, stores it in S3, and triggers pipeline processing. The number of parts listed must match `totalParts`.



## OpenAPI

````yaml /api-reference/openapi.json post /outbound/uploads/{uploadId}/complete
openapi: 3.0.3
info:
  title: FileFeed API
  version: '2026-05-25'
  description: >-
    Official FileFeed REST API for connections, pipelines, schemas, pipeline
    runs, webhooks, outbound uploads, documents, files, and notifications.
    Date-based API versioning is controlled by the `FileFeed-Version` request
    header (default `2024-09-01`; latest `2026-05-25`); this document describes
    the `2026-05-25` shape.
servers:
  - url: https://api.sftpsync.io
security:
  - ApiKeyAuth: []
tags:
  - name: Connections
  - name: Pipelines
  - name: Schemas
  - name: Pipeline Runs
  - name: Webhooks
  - name: Outbound Uploads
  - name: Documents
  - name: Files
  - name: Notifications
  - name: Clients (deprecated)
paths:
  /outbound/uploads/{uploadId}/complete:
    post:
      tags:
        - Outbound Uploads
      summary: Complete outbound multipart upload and trigger processing
      description: >-
        Combines all uploaded parts into one file, stores it in S3, and triggers
        pipeline processing. The number of parts listed must match `totalParts`.
      operationId: completeOutboundUpload
      parameters:
        - name: uploadId
          in: path
          required: true
          schema:
            type: string
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/CompleteOutboundUploadParams'
            example:
              parts:
                - partNumber: 1
                - partNumber: 2
                - partNumber: 3
      responses:
        '200':
          description: Upload completed and processing started
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/CompleteOutboundUploadResponse'
              example:
                message: >-
                  Upload a1b2c3d4 completed. Processing started for
                  employees.json
                filename: employees.json
        '400':
          $ref: '#/components/responses/BadRequest'
        '404':
          $ref: '#/components/responses/NotFound'
components:
  schemas:
    CompleteOutboundUploadParams:
      type: object
      properties:
        parts:
          type: array
          items:
            $ref: '#/components/schemas/CompleteOutboundUploadPart'
          description: Ordered list of all parts. Count must match totalParts.
        filename:
          type: string
          description: Optional final filename override.
      required:
        - parts
    CompleteOutboundUploadResponse:
      type: object
      properties:
        message:
          type: string
        filename:
          type: string
      required:
        - message
        - filename
    CompleteOutboundUploadPart:
      type: object
      properties:
        partNumber:
          type: integer
          minimum: 1
        etag:
          type: string
          description: Optional ETag returned by uploadPart.
      required:
        - partNumber
    ErrorResponse:
      type: object
      properties:
        message:
          type: string
        statusCode:
          type: integer
        error:
          type: string
  responses:
    BadRequest:
      description: Bad request
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
    NotFound:
      description: Not found
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ErrorResponse'
  securitySchemes:
    ApiKeyAuth:
      type: apiKey
      in: header
      name: x-api-key

````