# Apache OpenNLP

**Canonical:** https://apis.io/providers/apache-opennlp/  
**APIs profiled:** 10

Apache OpenNLP is a machine learning based toolkit for the processing of natural language text. It supports common NLP tasks such as tokenization, sentence segmentation, part-of-speech tagging, named entity extraction, chunking, parsing, and coreference resolution.

## Kin Score — 23.6 / 100 (emerging)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 23.6).

| Facet | Score |
|---|---|
| Discoverability | 64.8 |
| Contract Quality | 19.3 |
| Governance | 25.0 |
| Contract Governance | 25.0 |
| Operational Transparency | 10.5 |
| Developer Ergonomics | 23.8 |
| Commercial Clarity | 15.8 |
| Access Clarity | 15.8 |

## Agent readiness — 20.5 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| 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 (10)

- **Apache OpenNLP Chunking API** — The Chunking API from Apache OpenNLP — 1 operation(s) for chunking.
- **Apache OpenNLP Document Categorization API** — The Document Categorization API from Apache OpenNLP — 1 operation(s) for document categorization.
- **Apache OpenNLP Language Detection API** — The Language Detection API from Apache OpenNLP — 1 operation(s) for language detection.
- **Apache OpenNLP Lemmatization API** — The Lemmatization API from Apache OpenNLP — 1 operation(s) for lemmatization.
- **Apache OpenNLP Models API** — The Models API from Apache OpenNLP — 2 operation(s) for models.
- **Apache OpenNLP Named Entity Recognition API** — The Named Entity Recognition API from Apache OpenNLP — 1 operation(s) for named entity recognition.
- **Apache OpenNLP Parsing API** — The Parsing API from Apache OpenNLP — 1 operation(s) for parsing.
- **Apache OpenNLP POS Tagging API** — The POS Tagging API from Apache OpenNLP — 1 operation(s) for pos tagging.
- **Apache OpenNLP Sentence Detection API** — The Sentence Detection API from Apache OpenNLP — 1 operation(s) for sentence detection.
- **Apache OpenNLP Tokenization API** — The Tokenization API from Apache OpenNLP — 1 operation(s) for tokenization.

## Agentic access (1)

- **Apache Opennlp Agentic Access** — 11 operations · 9 acting

## Security (2)

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

## Plans (1)

- **Apache Opennlp Plans Pricing**

## Use cases (5)

- **Information Extraction** — Extract structured data from unstructured text documents
- **Text Classification** — Automatically categorize documents by topic or sentiment
- **Search Enhancement** — Improve search relevance with NLP-based query processing
- **Content Analysis** — Analyze large text corpora for entities, topics, and patterns
- **Chatbot Development** — Build conversational AI with NLP intent and entity extraction

## Tags

Machine-Learning, Natural Language Processing, NLP, Text Processing, Apache, Open-Source, Java

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