> ## Documentation Index > Fetch the complete documentation index at: https://docs.case.dev/llms.txt > Use this file to discover all available pages before exploring further. # Generate presigned URL for object operations > Generate presigned URLs for direct S3 operations (GET, PUT, DELETE, HEAD) on vault objects. This allows secure, time-limited access to files without proxying through the API. Essential for large document uploads/downloads in legal workflows. ## OpenAPI ````yaml /openapi.json post /vault/{id}/objects/{objectId}/presigned-url openapi: 3.1.0 info: title: Case.dev API description: >- The AI-native platform for legal technology. Build smarter legal applications with our suite of AI-powered APIs. version: 1.0.0 contact: name: Case.dev Support email: support@casemark.com url: https://case.dev license: name: Proprietary url: https://case.dev/terms servers: - url: https://api.case.dev description: Production security: - bearerAuth: [] tags: - name: Vaults description: Secure document storage with semantic search and GraphRAG - name: Memory description: >- Persistent memory for AI agents with semantic search and 12 generic indexed tag fields - name: OCR description: Extract text from PDFs, images, and scanned documents - name: Voice description: Audio transcription and text-to-speech - name: LLMs description: Access 40+ language models through a unified API - name: Search description: Web search, AI answers, and deep research - name: Mail description: Managed inboxes for agent email workflows - name: Media description: Transcript retrieval and captioned media clip generation - name: Legal description: Legal research tools including citation verification - name: Privilege description: Privilege detection for e-discovery and litigation workflows - name: Compute description: Serverless GPU and CPU infrastructure - name: Format description: Document formatting and template rendering (MD/JSON to PDF/DOCX) - name: SuperDoc description: Document conversion and template automation - name: Webhooks description: Webhook endpoint management - name: System description: Public system metadata and discovery endpoints - name: Usage description: Usage reporting and webhook subscriptions - name: Database description: Serverless PostgreSQL databases with instant branching - name: Translation description: Language detection and translation for multilingual legal workflows - name: Skills description: Search and read legal AI skills for agents - name: Agents description: >- Create, manage, and execute AI agents with tool access, sandbox environments, and async run workflows - name: Matters description: Matter-native legal workspaces and orchestration primitives - name: Applications Projects description: Web application project management - name: Applications Deployments description: Web application deployment management - name: Applications Domains description: Custom domain configuration for applications - name: Applications Env Vars description: Environment variable management for applications paths: /vault/{id}/objects/{objectId}/presigned-url: post: tags: - Vaults summary: Generate presigned URL for object operations description: >- Generate presigned URLs for direct S3 operations (GET, PUT, DELETE, HEAD) on vault objects. This allows secure, time-limited access to files without proxying through the API. Essential for large document uploads/downloads in legal workflows. operationId: generateObjectPresignedUrl parameters: - name: id in: path required: true schema: type: string description: The unique identifier of the vault - name: objectId in: path required: true schema: type: string description: The unique identifier of the object requestBody: required: true content: application/json: schema: type: object properties: operation: type: string enum: - GET - PUT - DELETE - HEAD default: GET description: The S3 operation to generate URL for expiresIn: type: integer minimum: 60 maximum: 604800 default: 3600 description: URL expiration time in seconds (1 minute to 7 days) contentType: type: string description: >- Content type for PUT operations (optional, defaults to object's content type) sizeBytes: type: integer minimum: 1 maximum: 5368709120 description: >- File size in bytes (optional, max 5GB for single PUT uploads). When provided for PUT operations, enforces exact file size at S3 level. responses: '200': description: Presigned URL generated successfully content: application/json: schema: type: object properties: objectId: type: string description: The object identifier vaultId: type: string description: The vault identifier filename: type: string description: Original filename s3Key: type: string description: S3 object key operation: type: string description: The operation type presignedUrl: type: string description: The presigned URL for direct S3 access expiresIn: type: integer description: URL expiration time in seconds expiresAt: type: string format: date-time description: URL expiration timestamp instructions: type: object description: Usage instructions and examples metadata: type: object properties: contentType: type: string sizeBytes: type: integer bucket: type: string region: type: string '400': description: Invalid request parameters or operation '401': description: Invalid or missing API key '403': description: API key lacks vault service permissions '404': description: Vault or object not found components: securitySchemes: bearerAuth: type: http scheme: bearer bearerFormat: API Key description: API key starting with `sk_case_` ````