# TopK Collection API

**Canonical:** https://apis.io/apis/topk/collection-api/  
**Provider:** Topk — https://apis.io/providers/topk/  
**Base URL:** https://elastica.api.topk.io  
**Documentation:** https://docs.topk.io/collections/query

TopK Collection API is one of 3 APIs that [Topk](https://apis.io/providers/topk/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Collection, Query, Hybrid Search, and Documents. The published artifact set on APIs.io includes API documentation and an API reference.

Structured document store and query surface. Create collections with typed, indexed fields (keyword_index, semantic_index, vector index), upsert/update/delete documents by `_id`, and run hybrid queries that combine dense vector, multi-vector, sparse vector, BM25 keyword search, and metadata filtering in a single request.

## Machine-readable artifacts (3)

- **Documentation** — https://docs.topk.io/collections/query
- **APIReference** — https://docs.topk.io/sdk/topk-py
- **APIsJSON** — https://raw.githubusercontent.com/api-evangelist/topk/refs/heads/main/apis.yml

## Other Topk APIs (2)

- [TopK Dataset API](https://apis.io/apis/topk/dataset-api/)
- [TopK Management API](https://apis.io/apis/topk/management-api/)

## Tags

Collection, Query, Hybrid Search, Documents

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/topk/collection-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/topk/.