TopK

TopK 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.

Docs

Start with the documentation for quickstart guides, API reference, and product documentation.

Building with a coding agent

Using Claude Code, Cursor, Codex, or another coding agent? Install the TopK skill so the agent writes correct TopK code. It covers schema design, chunking, hybrid queries, multi-tenancy, and the common mistakes.

npx skills add topk-io/topk --skill topk

SDKs

• Python SDK - Python SDK for TopK API
• JavaScript SDK - Javascript SDK for TopK API with full Typescript support
• Rust SDK - Rust SDK for TopK API
• SQL - Connect any PostgreSQL client to TopK

CLI

• TopK CLI - CLI for TopK API