> ## Documentation Index > Fetch the complete documentation index at: https://docs.comfy.org/llms.txt > Use this file to discover all available pages before exploring further. # Update asset metadata > Updates an asset's metadata. At least one field must be provided. Only name, tags, and user_metadata can be updated. ## OpenAPI ````yaml /openapi-cloud.yaml put /api/assets/{id} openapi: 3.0.3 info: title: Comfy Cloud API description: > **Experimental API:** This API is experimental and subject to change. Endpoints, request/response formats, and behavior may be modified without notice. API for Comfy Cloud - Run ComfyUI workflows on cloud infrastructure. This API allows you to interact with Comfy Cloud programmatically, including: - Submitting and managing workflows - Uploading and downloading files - Monitoring job status and progress ## Cloud vs OSS ComfyUI Compatibility Comfy Cloud implements the same API interfaces as OSS ComfyUI for maximum compatibility, but some fields are accepted for compatibility while being handled differently or ignored: | Field | Endpoints | Cloud Behavior | |-------|-----------|----------------| | `subfolder` | `/api/view`, `/api/upload/*` | **Ignored** - Cloud uses content-addressed storage (hash-based). Returned in responses for client-side organization. | | `type` (input/output/temp) | `/api/view`, `/api/upload/*` | Partially used - All files stored with tag-based organization rather than directory structure. | | `overwrite` | `/api/upload/*` | **Ignored** - Content-addressed storage means identical content always has the same hash. | | `number`, `front` | `/api/prompt` | **Ignored** - Cloud uses its own fair queue scheduling per user. | | `split`, `full_info` | `/api/userdata` | **Ignored** - Cloud always returns full file metadata. | These fields are retained in the API schema for drop-in compatibility with existing ComfyUI clients and workflows. version: 1.0.0 license: name: GNU General Public License v3.0 url: https://github.com/comfyanonymous/ComfyUI/blob/master/LICENSE servers: - url: https://cloud.comfy.org description: Comfy Cloud API security: - ApiKeyAuth: [] tags: - name: workflow description: | Submit workflows for execution and manage the execution queue. This is the primary way to run ComfyUI workflows on the cloud. - name: job description: | Monitor job status, view execution history, and manage running jobs. Jobs are created when you submit a workflow via POST /api/prompt. - name: asset description: | Upload, download, and manage persistent assets (images, models, outputs). Assets provide durable storage with tagging and metadata support. - name: file description: | Legacy file upload and download endpoints compatible with local ComfyUI. For new integrations, consider using the Assets API instead. - name: model description: | Browse available AI models. Models are pre-loaded on cloud infrastructure. - name: node description: | Get information about available ComfyUI nodes and their inputs/outputs. Useful for building dynamic workflow interfaces. - name: user description: | User account information and personal data storage. - name: system description: | Server status, health checks, and system information. paths: /api/assets/{id}: put: tags: - asset summary: Update asset metadata description: | Updates an asset's metadata. At least one field must be provided. Only name, tags, and user_metadata can be updated. operationId: updateAsset parameters: - name: id in: path required: true description: Asset ID schema: type: string format: uuid requestBody: required: true content: application/json: schema: type: object properties: name: type: string description: New display name for the asset tags: type: array items: type: string description: Updated tags for the asset mime_type: type: string description: Updated MIME type of the asset preview_id: type: string format: uuid description: Updated preview asset ID user_metadata: type: object description: Updated custom metadata additionalProperties: true minProperties: 1 responses: '200': description: Asset updated successfully content: application/json: schema: $ref: '#/components/schemas/AssetUpdated' '400': description: Invalid request (no fields provided) content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' '401': description: Unauthorized content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' '404': description: Asset not found content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' '500': description: Internal server error content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' components: schemas: AssetUpdated: type: object required: - id - updated_at properties: id: type: string format: uuid description: Asset ID name: type: string description: Updated name of the asset asset_hash: type: string description: Blake3 hash of the asset content pattern: ^blake3:[a-f0-9]{64}$ tags: type: array items: type: string description: Updated tags for the asset mime_type: type: string description: Updated MIME type of the asset user_metadata: type: object description: Updated custom metadata additionalProperties: true updated_at: type: string format: date-time description: Timestamp of the update ErrorResponse: type: object required: - code - message properties: code: type: string message: type: string securitySchemes: ApiKeyAuth: type: apiKey in: header name: X-API-Key description: > API key authentication. Generate an API key from your account settings at https://platform.comfy.org/profile/api-keys. Pass the key in the X-API-Key header. ````