> ## Documentation Index > Fetch the complete documentation index at: https://docs.postinger.dev/llms.txt > Use this file to discover all available pages before exploring further. # Sign parts, list parts, complete or abort a large video upload > Required permissions: media-write. ## OpenAPI ````yaml /api-reference/openapi.json post /media/{id}/multipart openapi: 3.1.0 info: title: Postinger Public API version: 1.0.0 description: >- Project-scoped API keys. JSON bodies up to 100 KB. Upload media directly to the returned R2 URL, then complete the upload. Rate limits are shared by all keys in the project. Scheduling requires posts-publish in addition to posts-write. A paused key returns 403 with error.code api_key_paused. servers: - url: https://api.dev.postinger.dev/public/v1 security: [] paths: /media/{id}/multipart: parameters: - name: id in: path required: true schema: type: string format: uuid post: tags: - Media summary: Sign parts, list parts, complete or abort a large video upload description: 'Required permissions: media-write.' operationId: multipartMedia requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/Multipart' responses: '200': description: Success headers: X-Request-Id: schema: type: string description: Request identifier for troubleshooting. Cache-Control: schema: type: string const: no-store X-RateLimit-Limit: schema: type: integer description: Project-wide limit, when supplied by the rate limiter. X-RateLimit-Remaining: schema: type: integer description: Remaining project requests, when supplied by the rate limiter. content: application/json: schema: type: object required: - data - meta properties: data: $ref: '#/components/schemas/MultipartResult' meta: type: object required: - requestId properties: requestId: type: string '400': description: Request failed. Check error.code and meta.requestId. headers: X-Request-Id: schema: type: string description: Request identifier for troubleshooting. Cache-Control: schema: type: string const: no-store X-RateLimit-Limit: schema: type: integer description: Project-wide limit, when supplied by the rate limiter. X-RateLimit-Remaining: schema: type: integer description: Remaining project requests, when supplied by the rate limiter. content: application/json: schema: type: object required: - error - meta properties: error: type: object required: - code - message properties: code: type: string message: anyOf: - type: string - type: array items: type: string meta: type: object required: - requestId properties: requestId: type: string '401': description: Request failed. Check error.code and meta.requestId. headers: X-Request-Id: schema: type: string description: Request identifier for troubleshooting. Cache-Control: schema: type: string const: no-store X-RateLimit-Limit: schema: type: integer description: Project-wide limit, when supplied by the rate limiter. X-RateLimit-Remaining: schema: type: integer description: Remaining project requests, when supplied by the rate limiter. content: application/json: schema: type: object required: - error - meta properties: error: type: object required: - code - message properties: code: type: string message: anyOf: - type: string - type: array items: type: string meta: type: object required: - requestId properties: requestId: type: string '403': description: Request failed. Check error.code and meta.requestId. headers: X-Request-Id: schema: type: string description: Request identifier for troubleshooting. Cache-Control: schema: type: string const: no-store X-RateLimit-Limit: schema: type: integer description: Project-wide limit, when supplied by the rate limiter. X-RateLimit-Remaining: schema: type: integer description: Remaining project requests, when supplied by the rate limiter. content: application/json: schema: type: object required: - error - meta properties: error: type: object required: - code - message properties: code: type: string message: anyOf: - type: string - type: array items: type: string meta: type: object required: - requestId properties: requestId: type: string '404': description: Request failed. Check error.code and meta.requestId. headers: X-Request-Id: schema: type: string description: Request identifier for troubleshooting. Cache-Control: schema: type: string const: no-store X-RateLimit-Limit: schema: type: integer description: Project-wide limit, when supplied by the rate limiter. X-RateLimit-Remaining: schema: type: integer description: Remaining project requests, when supplied by the rate limiter. content: application/json: schema: type: object required: - error - meta properties: error: type: object required: - code - message properties: code: type: string message: anyOf: - type: string - type: array items: type: string meta: type: object required: - requestId properties: requestId: type: string '409': description: Request failed. Check error.code and meta.requestId. headers: X-Request-Id: schema: type: string description: Request identifier for troubleshooting. Cache-Control: schema: type: string const: no-store X-RateLimit-Limit: schema: type: integer description: Project-wide limit, when supplied by the rate limiter. X-RateLimit-Remaining: schema: type: integer description: Remaining project requests, when supplied by the rate limiter. Retry-After: schema: type: integer description: Present for idempotency_in_progress; wait before retrying. content: application/json: schema: type: object required: - error - meta properties: error: type: object required: - code - message properties: code: type: string message: anyOf: - type: string - type: array items: type: string meta: type: object required: - requestId properties: requestId: type: string '413': description: >- JSON body exceeds the 100 KB limit. This can be rejected before the controller, so the public error envelope is not guaranteed. '429': description: Request failed. Check error.code and meta.requestId. headers: X-Request-Id: schema: type: string description: Request identifier for troubleshooting. Cache-Control: schema: type: string const: no-store X-RateLimit-Limit: schema: type: integer description: Project-wide limit, when supplied by the rate limiter. X-RateLimit-Remaining: schema: type: integer description: Remaining project requests, when supplied by the rate limiter. Retry-After: schema: type: integer description: Seconds before retrying. content: application/json: schema: type: object required: - error - meta properties: error: type: object required: - code - message properties: code: type: string message: anyOf: - type: string - type: array items: type: string meta: type: object required: - requestId properties: requestId: type: string '500': description: Request failed. Check error.code and meta.requestId. headers: X-Request-Id: schema: type: string description: Request identifier for troubleshooting. Cache-Control: schema: type: string const: no-store X-RateLimit-Limit: schema: type: integer description: Project-wide limit, when supplied by the rate limiter. X-RateLimit-Remaining: schema: type: integer description: Remaining project requests, when supplied by the rate limiter. content: application/json: schema: type: object required: - error - meta properties: error: type: object required: - code - message properties: code: type: string message: anyOf: - type: string - type: array items: type: string meta: type: object required: - requestId properties: requestId: type: string '503': description: Request failed. Check error.code and meta.requestId. headers: X-Request-Id: schema: type: string description: Request identifier for troubleshooting. Cache-Control: schema: type: string const: no-store X-RateLimit-Limit: schema: type: integer description: Project-wide limit, when supplied by the rate limiter. X-RateLimit-Remaining: schema: type: integer description: Remaining project requests, when supplied by the rate limiter. content: application/json: schema: type: object required: - error - meta properties: error: type: object required: - code - message properties: code: type: string message: anyOf: - type: string - type: array items: type: string meta: type: object required: - requestId properties: requestId: type: string security: - ApiKey: [] components: schemas: Multipart: $schema: https://json-schema.org/draft/2020-12/schema type: object properties: operation: type: string enum: - list - sign - complete - abort partNumber: type: integer minimum: 1 maximum: 128 required: - operation additionalProperties: false description: >- sign requires partNumber within the upload part count. complete uses parts already uploaded to storage; call media complete afterward to validate the file. list can also return completed: true if storage assembly already finished. allOf: - if: properties: operation: const: sign required: - operation then: required: - partNumber MultipartResult: $schema: https://json-schema.org/draft/2020-12/schema anyOf: - type: object properties: url: type: string required: - url - type: object properties: parts: type: array items: type: object properties: partNumber: type: integer minimum: -9007199254740991 maximum: 9007199254740991 etag: type: string size: type: number required: - partNumber - etag - size required: - parts - type: object properties: completed: type: boolean const: true required: - completed - type: object properties: aborted: type: boolean const: true required: - aborted securitySchemes: ApiKey: type: http scheme: bearer bearerFormat: Postinger API key ```` ## Related topics - [Upload media](/guides/media.md) - [Create an image or video upload](/api-reference/media/create-an-image-or-video-upload.md) - [MCP tool reference](/mcp/tools.md) - [Authentication and permissions](/guides/authentication.md) - [Your first draft](/quickstart.md) This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.