/api/solr/<collectionName>/<solrRequest>
where <collectionName> is the name of an specific collection and <solrRequest> is the Solr command you wish to run.
Since this API proxies requests to Solr, each available method corresponds to the method in Solr. So, a GET request to Solr would use the GET method of this endpoint; a POST would use the POST method, etc.
Depending on the request, the response may consist of records that match a query
or output from a Schema API request.