> ## Documentation Index > Fetch the complete documentation index at: https://info.bundle.social/llms.txt > Use this file to discover all available pages before exploring further. # Complete multipart upload > Assemble the uploaded parts into the final object and add it to your media library. Send every part with the ETag returned by its PUT. A 500 is always retryable — whatever we have (your parts, or the assembled object) is kept, so retry this call rather than re-uploading. A 400 is final: either the part list was wrong, or the file itself was rejected (empty, wrong type, too large, no readable preview) and its bytes have been deleted. A 403 means quota or permissions and is raised before assembly, so your parts are still open — call abort yourself. Calling this again after it already succeeded returns the same upload instead of charging you twice. ## OpenAPI ````yaml https://api.bundle.social/swagger-json post /api/v1/upload/multipart/complete openapi: 3.0.2 info: title: bundle.social API description: >- REST API for social media management. Perfect for AI assistants, GPTs, automation tools, and integrations. Post to 14+ platforms including Twitter, Instagram, Facebook, LinkedIn, TikTok, Pinterest, Reddit, Discord, Slack, YouTube, Mastodon, Bluesky, Threads, and Google Business. Schedule posts, manage content, analyze performance, and automate your social media workflow across all platforms. version: 1.0.0 contact: email: contact@bundle.social termsOfService: https://bundle.social/terms servers: - url: https://api.bundle.social - url: http://localhost:3001 security: - ApiKeyAuth: [] tags: - name: app - name: organization - name: team - name: socialAccount - name: upload - name: post - name: postImport - name: analytics - name: comment - name: misc - name: postCSV paths: /api/v1/upload/multipart/complete: post: tags: - upload summary: Complete multipart upload description: >- Assemble the uploaded parts into the final object and add it to your media library. Send every part with the ETag returned by its PUT. A 500 is always retryable — whatever we have (your parts, or the assembled object) is kept, so retry this call rather than re-uploading. A 400 is final: either the part list was wrong, or the file itself was rejected (empty, wrong type, too large, no readable preview) and its bytes have been deleted. A 403 means quota or permissions and is raised before assembly, so your parts are still open — call abort yourself. Calling this again after it already succeeded returns the same upload instead of charging you twice. operationId: upload.completeMultipartUpload parameters: [] requestBody: description: Body content: application/json: schema: type: object properties: teamId: type: string nullable: true parts: type: array items: type: object properties: partNumber: type: integer minimum: 1 maximum: 10000 etag: type: string minLength: 1 required: - partNumber - etag minItems: 1 maxItems: 10000 path: type: string uploadId: type: string required: - parts - path - uploadId responses: '200': description: '200' content: application/json: schema: type: object properties: id: type: string teamId: type: string nullable: true organizationId: type: string nullable: true iconUrl: type: string format: uri nullable: true thumbnailUrl: type: string format: uri nullable: true url: type: string format: uri nullable: true externalLink: type: string format: uri nullable: true iconPath: type: string nullable: true thumbnailPath: type: string nullable: true path: type: string nullable: true type: type: string enum: - image - video - document width: type: number nullable: true height: type: number nullable: true fileSize: type: number nullable: true videoLength: type: number nullable: true mime: type: string nullable: true ext: type: string nullable: true createdAt: type: string format: date-time nullable: true updatedAt: type: string format: date-time nullable: true required: - id - type - createdAt - updatedAt '400': description: '400' content: application/json: schema: type: object properties: statusCode: type: number nullable: true message: type: string issues: type: array items: type: object properties: code: type: string enum: - invalid_type - invalid_literal - custom - invalid_union - invalid_union_discriminator - invalid_enum_value - unrecognized_keys - invalid_arguments - invalid_return_type - invalid_date - invalid_string - too_small - too_big - invalid_intersection_types - not_multiple_of - not_finite nullable: true message: type: string path: type: array items: oneOf: - type: string - type: number nullable: true required: - message nullable: true required: - message '401': description: '401' content: application/json: schema: type: object properties: statusCode: type: number nullable: true message: type: string required: - message '403': description: '403' content: application/json: schema: type: object properties: statusCode: type: number nullable: true message: type: string required: - message '404': description: '404' content: application/json: schema: type: object properties: statusCode: type: number nullable: true message: type: string required: - message '429': description: '429' content: application/json: schema: type: object properties: statusCode: type: number nullable: true message: type: string required: - message '500': description: '500' content: application/json: schema: type: object properties: statusCode: type: number nullable: true message: type: string required: - message components: securitySchemes: ApiKeyAuth: type: apiKey name: x-api-key in: header ````