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# TopK

[TopK](https://topk.io) is a unified retrieval engine for hybrid search, vector search, multi-vector retrieval, keyword search (BM25) custom ranking, and managed inference in one API. Built on object storage for 10x lower cost and massive scale.

## What TopK Does

**Retrieval Engine** — Store and query dense vectors, sparse vectors, multi-vector embeddings, and metadata in a single collection. Filter by metadata, rank with custom expressions, and run managed inference — all in a single API.

**File Search** — Ingest files, search across your private documents, and get source-backed answers. Connect your data to agents with the SDKs, CLI or MCP server.

## Docs

Start with the [documentation](https://docs.topk.io) for quickstart guides, API reference, and product documentation.

## SDKs

- [Python SDK](./topk-py/) - Python SDK for TopK API
- [JavaScript SDK](./topk-js/) - Javascript SDK for TopK API with full Typescript support
- [Rust SDK](./topk-rs/) - Rust SDK for TopK API
- [SQL](./topk-sql/) - Connect any PostgreSQL client to TopK

## CLI

- [TopK CLI](./topk-cli/) - CLI for TopK API

## MCP

- [TopK MCP](https://docs.topk.io/mcp-server) - Connect TopK to MCP-compatible AI agents

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