# Topk

**Canonical:** https://apis.io/providers/topk/  
**Website:** https://docs.topk.io  
**APIs profiled:** 3

TopK is a search engine for accuracy-critical AI applications, delivering hybrid search, multi-vector (late-interaction) retrieval, dense and sparse vector search, BM25 keyword search, custom ranking, document parsing, and grounded question answering through a single API. Built on object storage for roughly 10x lower cost and effectively unlimited scale, TopK exposes a Collection API for structured document storage and querying, a Dataset API for unstructured document ingestion, semantic search, and evidence-backed answers, and a Management API for datasets and collections. It ships official Python, JavaScript, Rust, and SQL (PostgreSQL-wire) SDKs, a Homebrew-installable CLI, and a hosted MCP server so AI agents can query private data with natural language. TopK is developed by topk-io and is a portfolio company of Earlybird.

## Kin Score — 41.7 / 100 (developing)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+1.1 from 40.6).

| Facet | Score |
|---|---|
| Discoverability | 92.6 |
| Contract Quality | 0.0 |
| Governance | 18.2 |
| Contract Governance | 18.2 |
| Operational Transparency | 44.7 |
| Developer Ergonomics | 68.5 |
| Commercial Clarity | 53.9 |
| Access Clarity | 53.9 |

## Agent readiness — 16.3 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | documented |
| Auth Clarity | yes |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | no |
| Event Surface Described | no |
| Agent Skills | derived |
| Well Known Catalog | no |
| Consent Identity | yes |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Self-serve signup — onboarding: self-serve, pricing: unknown, trial: no (confidence: medium).

## APIs (3)

- **TopK Collection API** — Structured document store and query surface. Create collections with typed, indexed fields (keyword_index, semantic_index, vector index), upsert/update/delete documents by `_id`...
- **TopK Dataset API** — Unstructured document ingestion, semantic search, and grounded question answering. Upload document files (PDF, Markdown, HTML, and more) to a dataset, retrieve the most relevant...
- **TopK Management API** — Create, list, get, update, and delete datasets and collections that back TopK search and retrieval.

## MCP servers (1)

- **Topk MCP Server** — TopK ships an official hosted, remote MCP server that lets any MCP-compatible AI agent query private datasets using natural language. It is region-scoped (one HTTP endpoint per ...

## Security (4)

- **Topk Authentication** — http · 1 scheme
- **Topk Domain Security** — TLSv1.3 · HSTS · DMARC
- **Topk Vulnerability Disclosure** — security.txt · contact published
- **Topk Trust Center** — SOC 2

## Tags

Company, Search, Vector Search, Hybrid Search, Multi-Vector Retrieval, Semantic Search, BM25, Retrieval, RAG, Question Answering, AI Infrastructure, Embeddings, MCP

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/topk/). Scores are computed from the provider's own public artifacts under a published rubric.