> ## 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.

# Deep legal research

> Perform comprehensive legal research with multiple query variations. Uses advanced deep search to find relevant sources across different phrasings of the legal issue.



## OpenAPI

````yaml /openapi.json post /legal/v1/research
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:
  /legal/v1/research:
    post:
      tags:
        - Legal
      summary: Deep legal research
      description: >-
        Perform comprehensive legal research with multiple query variations.
        Uses advanced deep search to find relevant sources across different
        phrasings of the legal issue.
      operationId: legalDeepResearch
      requestBody:
        description: Research query and options
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
                - query
              properties:
                query:
                  type: string
                  description: Primary search query
                  minLength: 3
                  maxLength: 1000
                additionalQueries:
                  type: array
                  items:
                    type: string
                  description: >-
                    Additional query variations to search (e.g., different
                    phrasings of the legal issue)
                  maxItems: 5
                jurisdiction:
                  type: string
                  description: Optional jurisdiction ID from resolveJurisdiction
                numResults:
                  type: integer
                  description: 'Number of results 1-25 (default: 10)'
                  minimum: 1
                  maximum: 25
                  default: 10
      responses:
        '200':
          description: Research completed successfully
          content:
            application/json:
              schema:
                type: object
                properties:
                  query:
                    type: string
                    description: Primary search query
                  additionalQueries:
                    type: array
                    items:
                      type: string
                    description: Additional queries used
                    nullable: true
                  jurisdiction:
                    type: string
                    description: Jurisdiction filter applied
                  searchType:
                    type: string
                    description: Search type used (deep)
                  found:
                    type: integer
                    description: Number of candidates found
                  candidates:
                    type: array
                    items:
                      type: object
                      properties:
                        url:
                          type: string
                          description: URL of the legal source
                        title:
                          type: string
                          description: Title of the document
                        snippet:
                          type: string
                          description: Text excerpt from the document
                        highlights:
                          type: array
                          items:
                            type: string
                          description: Highlighted relevant passages
                        publishedDate:
                          type: string
                          description: Publication date
                          nullable: true
                        source:
                          type: string
                          description: Domain of the source
                  hint:
                    type: string
                    description: Usage guidance
        '400':
          description: Bad request - invalid query parameters
        '401':
          description: Unauthorized - invalid API key
        '403':
          description: Forbidden - insufficient permissions
        '503':
          description: Service unavailable - search service unreachable
components:
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: API Key
      description: API key starting with `sk_case_`

````