> ## Documentation Index > Fetch the complete documentation index at: https://docs.valyu.ai/llms.txt > Use this file to discover all available pages before exploring further. # List Categories > Returns all datasource categories with dataset counts ## OpenAPI ````yaml GET /v1/datasources/categories openapi: 3.0.3 info: title: Valyu API version: 2.2.0 description: > The search API built for AI agents. One API that gives your AI unified access to web search, academic papers, financial data, SEC filings, clinical trials, patents, and 36+ proprietary data sources. ## Products | Product | Endpoint | Description | | --- | --- | --- | | **Search** | `POST /v1/search` | Multi-source search across web and proprietary datasets | | **Contents** | `POST /v1/contents` | Extract clean, structured content from URLs | | **Answer** | `POST /v1/answer` | AI-powered answers with real-time search | | **DeepResearch** | `POST /v1/deepresearch/tasks` | Async research agents for comprehensive analysis | | **Datasources** | `GET /v1/datasources` | Discover available data sources and their schemas | ## Authentication All endpoints require an API key passed via the `X-API-Key` header. Get your key at [platform.valyu.ai](https://platform.valyu.ai). ``` X-API-Key: your_api_key_here ``` ## Pricing Valyu uses transparent, pay-per-use pricing: - **Search**: CPM-based (cost per mille tokens retrieved) - **Contents**: $0.001 per URL extracted, +$0.001 with AI features - **Answer**: $0.10 per request + variable search and AI costs - **DeepResearch**: Fixed per-task pricing by mode ($0.10 - $15.00) See [docs.valyu.ai](https://docs.valyu.ai) for full pricing details. ## SDKs - [Python SDK](https://pypi.org/project/valyu/) - `pip install valyu` - [TypeScript SDK](https://www.npmjs.com/package/valyu) - `npm install valyu` contact: name: Valyu Support url: https://valyu.ai email: support@valyu.ai x-logo: url: https://valyu.ai/logo.png altText: Valyu servers: - url: https://api.valyu.ai description: Production security: - ApiKeyAuth: [] tags: - name: Search description: >- Search across web, academic, financial, and proprietary data sources. Returns results ready for RAG pipelines, AI agents, and applications. externalDocs: description: Search API Guide url: https://docs.valyu.ai/search/quickstart - name: Contents description: >- Extract clean, structured content from web pages at scale. Supports batch processing, AI-powered summaries, structured extraction via JSON schemas, and async jobs for large URL sets. externalDocs: description: Contents API Guide url: https://docs.valyu.ai/guides/content-extraction - name: Answer description: >- Get AI-powered answers grounded in real-time search results. The Answer API searches across web, academic, and financial sources, then uses AI to generate a readable response via Server-Sent Events streaming. externalDocs: description: Answer API Guide url: https://docs.valyu.ai/guides/answer-api - name: DeepResearch description: >- Async research agents that perform comprehensive, multi-step research. DeepResearch searches multiple sources, analyzes content, and generates detailed reports with citations. Tasks run in the background and can take minutes to complete. externalDocs: description: DeepResearch Guide url: https://docs.valyu.ai/guides/deepresearch - name: Batches description: >- Run multiple DeepResearch tasks in parallel with shared configuration, unified monitoring, and aggregated cost tracking. externalDocs: description: Batch API Guide url: https://docs.valyu.ai/guides/deepresearch-batch-quickstart - name: Datasources description: >- Discover available data sources and their schemas. A tool manifest for AI agents - instead of hardcoding knowledge of available datasets, agents can query this API to discover sources, filter by category, and use `example_queries` for few-shot prompting. externalDocs: description: Datasources Guide url: https://docs.valyu.ai/guides/datasources externalDocs: description: Complete API Documentation url: https://docs.valyu.ai paths: /v1/datasources/categories: get: tags: - Datasources summary: List datasource categories description: >- Retrieve all available datasource categories. Use these to filter the datasources endpoint. Categories include: `research`, `healthcare`, `markets`, `company`, `economic`, `predictions`, `transportation`, `legal`, `politics`, `patents`. operationId: listDatasourceCategories responses: '200': description: List of datasource categories. content: application/json: schema: $ref: '#/components/schemas/DatasourceCategoriesResponse' examples: example: summary: All categories value: success: true categories: - id: research name: Research description: Academic papers, preprints, and scholarly articles. dataset_count: 8 - id: healthcare name: Healthcare description: >- Medical literature, clinical trials, drug data, and health records. dataset_count: 6 - id: markets name: Markets description: >- Stock prices, earnings, SEC filings, and financial data. dataset_count: 5 '401': $ref: '#/components/responses/Unauthorized' '500': $ref: '#/components/responses/InternalServerError' components: schemas: DatasourceCategoriesResponse: type: object required: - success - categories properties: success: type: boolean description: Whether the request succeeded. example: true categories: type: array description: Array of available datasource categories. items: $ref: '#/components/schemas/DatasourceCategory' DatasourceCategory: type: object description: A category of data sources. required: - id - name - description properties: id: type: string description: Unique category identifier. example: research name: type: string description: Display name of the category. example: Research description: type: string description: What this category covers. example: Academic papers, preprints, and scholarly articles. dataset_count: type: integer description: Number of datasets in this category. example: 8 Error: type: object description: Standard error response. required: - success - error properties: success: type: boolean description: Always `false` for error responses. example: false error: type: string description: Human-readable error message describing what went wrong. example: Invalid request parameters responses: Unauthorized: description: Missing or invalid API key. content: application/json: schema: $ref: '#/components/schemas/Error' examples: example: summary: Invalid API key value: success: false error: Invalid API key InternalServerError: description: An unexpected error occurred on the server. content: application/json: schema: $ref: '#/components/schemas/Error' examples: example: summary: Internal error value: success: false error: Internal server error. Please try again later. securitySchemes: ApiKeyAuth: type: apiKey in: header name: X-API-Key description: >- API key for authentication. Get yours at [platform.valyu.ai](https://platform.valyu.ai). ````