# TopK Documentation

> The context layer for vertical AI agents.

## Overview

- [What is TopK?](https://docs.topk.io/introduction): Turn your documents into reliable context for agents and humans.
- [Quickstart](https://docs.topk.io/quickstart): Ingest your first document and ask a question.
- [Regions](https://docs.topk.io/regions): List available regions
- [Changelog](https://docs.topk.io/changelog)

## Core Concepts

- [Ingest](https://docs.topk.io/core/ingest): Upload your documents to TopK Context Engine.
- [Ask](https://docs.topk.io/core/ask): Get grounded, evidence-backed answers from your documents.
- [Search](https://docs.topk.io/core/search): Retrieve the most relevant passages from your documents.
- [Research](https://docs.topk.io/core/research): Perform deep multi-step research across your document corpus.
- [Managing Datasets](https://docs.topk.io/datasets): Create, list, get, update, and delete datasets.

## APIs

- [CLI](https://docs.topk.io/cli): Upload documents, ask questions and search relevant passages with TopK CLI.
- [MCP](https://docs.topk.io/mcp-server): Get started with TopK Context Engine using MCP server.
- [Python SDK](https://docs.topk.io/sdk/topk-py/overview): Get started with TopK Context Engine using Python SDK.
- [JavaScript SDK](https://docs.topk.io/sdk/topk-js/overview): Get started with TopK Context Engine using JavaScript SDK.
- [Rust SDK](https://github.com/topk-io/topk/tree/main/topk-rs): Get started with TopK Context Engine using Rust SDK.

## Python SDK Reference

- [topk_sdk](https://docs.topk.io/sdk/topk-py)
- [topk_sdk.data](https://docs.topk.io/sdk/topk-py/data)
- [topk_sdk.error](https://docs.topk.io/sdk/topk-py/error)
- [topk_sdk.query](https://docs.topk.io/sdk/topk-py/query)
- [topk_sdk.schema](https://docs.topk.io/sdk/topk-py/schema)

## JavaScript SDK Reference

- [topk-js](https://docs.topk.io/sdk/topk-js)
- [topk-js/data](https://docs.topk.io/sdk/topk-js/Namespace.data)
- [topk-js/query_fn](https://docs.topk.io/sdk/topk-js/Namespace.query_fn)
- [topk-js/query](https://docs.topk.io/sdk/topk-js/Namespace.query)
- [topk-js/schema](https://docs.topk.io/sdk/topk-js/Namespace.schema)

## Database APIs

- [TopK Database](https://docs.topk.io/database): TopK Database is a search engine for building fast semantic search, vector search, keyword (BM25) search, sparse vector search, multi-vector search or a combination of these — all within a single query. It is powering the [TopK Context Engine](https://docs.topk.io/introduction) and is also available as a standalone solution via [Python SDK](https://docs.topk.io/sdk/topk-py/index), [JavaScript SDK](https://docs.topk.io/sdk/topk-js/index) or [Rust SDK](https://github.com/topk-io/topk/tree/main/topk-rs).
- [TopK Database - Semantic search](https://docs.topk.io/concepts/semantic-search)
- [TopK Database - Vector search](https://docs.topk.io/concepts/vector-search)
- [TopK Database - Sparse vector search](https://docs.topk.io/concepts/sparse-vector-search)
- [TopK Database - Multi-vector search](https://docs.topk.io/concepts/multi-vector-search)
- [TopK Database - Keyword search](https://docs.topk.io/concepts/keyword-search)
- [TopK Database - True Hybrid search](https://docs.topk.io/concepts/true-hybrid-search)