---
title: API extension plugins
description: API extension plugins add new functionality to Elasticsearch by adding new APIs or features, usually to do with search or mapping. A number of plugins...
url: https://www.elastic.co/docs/reference/elasticsearch/plugins/api-extension-plugins
---

# API extension plugins
API extension plugins add new functionality to Elasticsearch by adding new APIs or features, usually to do with search or mapping.

## Community contributed API extension plugins

A number of plugins have been contributed by our community:
- [carrot2 Plugin](https://github.com/carrot2/elasticsearch-carrot2): Results clustering with [carrot2](https://github.com/carrot2/carrot2) (by Dawid Weiss)
- [Elasticsearch Trigram Accelerated Regular Expression Filter](https://github.com/wikimedia/search-extra): (by Wikimedia Foundation/Nik Everett)
- [Elasticsearch Experimental Highlighter](https://github.com/wikimedia/search-highlighter): (by Wikimedia Foundation/Nik Everett)
- [Entity Resolution Plugin](https://github.com/zentity-io/zentity) ([zentity](https://zentity.io)): Real-time entity resolution with pure Elasticsearch (by Dave Moore)