No Longer Maintained

Take a look at: #12 (comment)

Elasticpress Autosuggest Endpoint

Configuration:

• Elasticsearch Index name will be set automatically
• Optionally, specify the index name in ep_autosuggest()
• If needed, customize the endpoint in elasticpress-autosuggest-endpoint.php
• Otherwise, keep default settings

Setup:

• Elasticpress PHP Client is necessary (for Wordpress, see ElasticPress by 10up)
• if installed via composer it should be added automatically
• if not, go to plugin directory and run: composer install --no-dev

Elasticpress Autosuggest Settings:

• Default endpoint is http(s)://yourdomainname.com/wp-json/elasticpress/autosuggest/
• Use the default endpoint (or whatever you specified in register_rest_route) as the endpoint URL in the admin (ElasticPress / Autosuggest / Settings).