# Apache Lucene

**Canonical:** https://apis.io/providers/apache-lucene/  
**Website:** https://lucene.apache.org/  
**APIs profiled:** 1

Apache Lucene is a high-performance, full-featured text search engine library written entirely in Java. It provides indexing and search technology, as well as spellchecking, hit highlighting, faceting, vector similarity search, and advanced analysis and tokenization capabilities. Lucene is the foundation for many popular search applications including Apache Solr.

## Kin Score — 17.9 / 100 (emerging)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 17.9).

| Facet | Score |
|---|---|
| Discoverability | 59.3 |
| Contract Quality | 0.0 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 26.3 |
| Developer Ergonomics | 16.7 |
| Commercial Clarity | 26.3 |
| Access Clarity | 26.3 |

## Agent readiness — 3.0 (human-only)

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

## Access

Freemium — onboarding: unknown, pricing: freemium, trial: no (confidence: medium).

## APIs (1)

- **Apache Lucene** — Lucene provides a comprehensive Java API for full-text indexing, searching, faceting, hit highlighting, spatial search, vector nearest-neighbor search, and text analysis with su...

## Security (2)

- **Apache Lucene Domain Security** — TLSv1.3 · HSTS · DMARC
- **Apache Lucene Vulnerability Disclosure** — security.txt · contact published

## Plans (1)

- **Apache Lucene Plans Pricing**

## Use cases (5)

- **Enterprise Search** — Power full-text search across enterprise documents, emails, databases, and file systems.
- **E-Commerce Product Search** — Implement fast, relevant product search with facets, autocomplete, and spell correction.
- **Log and Event Search** — Index and search structured and unstructured log data for observability and security analytics.
- **Semantic Search** — Combine keyword search with vector embeddings for hybrid semantic and lexical retrieval.
- **Knowledge Base Search** — Build searchable knowledge bases and documentation portals with rich query capabilities.

## Tags

Full-Text Search, Indexing, Java, Search, Text Analysis, Vector Search

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