> ## 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. # Search vault documents > Search across vault documents using multiple methods including hybrid vector + graph search, GraphRAG global search, entity-based search, and fast similarity search. Returns relevant documents and contextual answers based on the search method. ## OpenAPI ````yaml /openapi.json post /vault/{id}/search 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}/search: post: tags: - Vaults summary: Search vault documents description: >- Search across vault documents using multiple methods including hybrid vector + graph search, GraphRAG global search, entity-based search, and fast similarity search. Returns relevant documents and contextual answers based on the search method. operationId: searchVault parameters: - name: id in: path required: true schema: type: string description: Unique identifier of the vault to search requestBody: required: true content: application/json: schema: type: object required: - query properties: query: type: string description: Search query or question to find relevant documents method: type: string enum: - vector - graph - hybrid - global - local - fast - entity default: hybrid description: >- Search method: 'global' for comprehensive questions, 'entity' for specific entities, 'fast' for quick similarity search, 'hybrid' for combined approach topK: type: integer default: 10 minimum: 1 maximum: 100 description: >- Maximum number of results to return. Hybrid search supports 1 to 50; other methods may support up to 100. filters: type: object description: Filters to narrow search results to specific documents properties: object_id: oneOf: - type: string - type: array items: type: string description: >- Filter to specific document(s) by object ID. Accepts a single ID or array of IDs. additionalProperties: true responses: '200': description: Search results with relevant documents and contextual answers content: application/json: schema: type: object properties: method: type: string description: Search method used query: type: string description: Original search query response: type: string description: >- AI-generated answer based on search results (for global/entity methods) sources: type: array items: type: object properties: id: type: string filename: type: string pageCount: type: integer textLength: type: integer chunkCount: type: integer createdAt: type: string format: date-time ingestionCompletedAt: type: string format: date-time chunks: type: array description: >- Relevant text chunks with similarity scores and page locations items: type: object properties: text: type: string description: Preview of the chunk text (up to 500 characters) object_id: type: string description: ID of the source document chunk_index: type: integer description: Index of the chunk within the document (0-based) page_start: type: integer nullable: true description: >- PDF page number where the chunk begins (1-indexed). Null for non-PDF documents or documents ingested before page tracking was added. page_end: type: integer nullable: true description: >- PDF page number where the chunk ends (1-indexed). Null for non-PDF documents or documents ingested before page tracking was added. word_start_index: type: integer nullable: true description: >- Starting word index (0-based) in the OCR word list. Use with GET /vault/:id/objects/:objectId/ocr-words to retrieve bounding boxes for highlighting. word_end_index: type: integer nullable: true description: >- Ending word index (0-based) in the OCR word list. Use with GET /vault/:id/objects/:objectId/ocr-words to retrieve bounding boxes for highlighting. start_ms: type: integer description: >- Source media timestamp for the first word in the chunk. Present only for media-backed transcripts with real word timing. end_ms: type: integer description: >- Source media timestamp for the last word in the chunk. Present only for media-backed transcripts with real word timing. distance: type: number description: Vector similarity distance (lower is more similar) score: type: number description: >- Relevance score (deprecated, use distance or hybridScore) source: type: string description: Source identifier (deprecated, use object_id) vault_id: type: string description: ID of the searched vault '400': description: Invalid request - missing vault ID or query '401': description: Invalid API key '404': description: Vault not found or access denied '500': description: Search service error components: securitySchemes: bearerAuth: type: http scheme: bearer bearerFormat: API Key description: API key starting with `sk_case_` ````