diff --git a/src/main/java/com/atomgraph/client/model/impl/ProxyResourceBase.java b/src/main/java/com/atomgraph/client/model/impl/ProxyResourceBase.java
index 31554457..0a603139 100644
--- a/src/main/java/com/atomgraph/client/model/impl/ProxyResourceBase.java
+++ b/src/main/java/com/atomgraph/client/model/impl/ProxyResourceBase.java
@@ -45,6 +45,7 @@
 import java.util.Locale;
 import jakarta.inject.Inject;
 import jakarta.servlet.http.HttpServletRequest;
+import jakarta.ws.rs.Consumes;
 import jakarta.ws.rs.NotAcceptableException;
 import jakarta.ws.rs.NotFoundException;
 import jakarta.ws.rs.ProcessingException;
@@ -228,7 +229,7 @@ public Response get(WebTarget target, Invocation.Builder builder)
         }
         catch (MessageBodyProviderNotFoundException ex)
         {
-            if (log.isWarnEnabled()) log.debug("Dereferenced URI {} returned non-RDF media type", ex);
+            if (log.isWarnEnabled()) log.debug("Dereferenced URI {} returned non-RDF media type", webTarget.getUri());
             throw new NotAcceptableException(ex);
         }
         catch (ProcessingException ex)
@@ -336,6 +337,38 @@ public Response post(Model model)
             post(Entity.entity(model, com.atomgraph.core.MediaType.APPLICATION_NTRIPLES_TYPE));
     }
 
+    /**
+     * Forwards POST request with SPARQL query body and returns response from remote resource.
+     * 
+     * @param sparqlQuery SPARQL query string
+     * @return response
+     */
+    @POST
+    @Consumes(com.atomgraph.core.MediaType.APPLICATION_SPARQL_QUERY)
+    public Response post(String sparqlQuery)
+    {
+        if (getWebTarget() == null) throw new NotFoundException("Resource URI not supplied");
+        
+        if (log.isDebugEnabled()) log.debug("POSTing SPARQL query to URI: {}", getWebTarget().getUri());
+        
+        try (Response cr = getWebTarget().request()
+                .accept(getReadableMediaTypes())
+                .post(Entity.entity(sparqlQuery, com.atomgraph.core.MediaType.APPLICATION_SPARQL_QUERY_TYPE)))
+        {
+            return getResponse(cr);
+        }
+        catch (MessageBodyProviderNotFoundException ex)
+        {
+            if (log.isWarnEnabled()) log.debug("Dereferenced URI {} returned non-RDF media type", getWebTarget().getUri());
+            throw new NotAcceptableException(ex);
+        }
+        catch (ProcessingException ex)
+        {
+            if (log.isWarnEnabled()) log.debug("Could not dereference URI: {}", getWebTarget().getUri());
+            throw new BadGatewayException(ex);
+        }
+    }
+
     /**
      * Forwards PUT request with RDF dataset body and returns response from remote resource.
      * 
diff --git a/src/main/webapp/static/com/atomgraph/client/xsl/bootstrap/2.3.2/document.xsl b/src/main/webapp/static/com/atomgraph/client/xsl/bootstrap/2.3.2/document.xsl
index 0468e36c..137524b4 100644
--- a/src/main/webapp/static/com/atomgraph/client/xsl/bootstrap/2.3.2/document.xsl
+++ b/src/main/webapp/static/com/atomgraph/client/xsl/bootstrap/2.3.2/document.xsl
@@ -68,7 +68,7 @@ exclude-result-prefixes="#all">
 
     <xsl:template match="rdf:RDF" mode="bs2:Form">
         <xsl:param name="method" select="'post'" as="xs:string"/>
-        <xsl:param name="action" select="xs:anyURI('?_method=PUT')" as="xs:anyURI"/>
+        <xsl:param name="action" select="xs:anyURI('?_method=PUT')" as="xs:anyURI" tunnel="yes"/>
         <xsl:param name="id" as="xs:string?"/>
         <xsl:param name="class" select="'form-horizontal'" as="xs:string?"/>
         <xsl:param name="button-class" select="'btn btn-primary'" as="xs:string?"/>
diff --git a/src/main/webapp/static/com/atomgraph/client/xsl/bootstrap/2.3.2/sparql.xsl b/src/main/webapp/static/com/atomgraph/client/xsl/bootstrap/2.3.2/sparql.xsl
index 8daa5e98..f119af19 100644
--- a/src/main/webapp/static/com/atomgraph/client/xsl/bootstrap/2.3.2/sparql.xsl
+++ b/src/main/webapp/static/com/atomgraph/client/xsl/bootstrap/2.3.2/sparql.xsl
@@ -94,7 +94,7 @@ LIMIT 100</xsl:param>
 
     <xsl:template name="bs2:QueryForm">
         <xsl:param name="method" select="'get'" as="xs:string"/>
-        <xsl:param name="action" select="xs:anyURI('')" as="xs:anyURI"/>
+        <xsl:param name="action" select="xs:anyURI('')" as="xs:anyURI" tunnel="yes"/>
         <xsl:param name="id" select="'query-form'" as="xs:string?"/>
         <xsl:param name="class" select="'form-horizontal'" as="xs:string?"/>
         <xsl:param name="accept-charset" select="'UTF-8'" as="xs:string?"/>
diff --git a/src/main/webapp/static/js/yasqe.js b/src/main/webapp/static/js/yasqe.js
index 4ec508f8..05b51862 100644
--- a/src/main/webapp/static/js/yasqe.js
+++ b/src/main/webapp/static/js/yasqe.js
@@ -24371,7 +24371,7 @@ root.autocompleteVariables = function(cm, token) {
  * @method YASQE.fetchFromPrefixCc
  */
 root.fetchFromPrefixCc = function(cm) {
-	$.get("http://prefix.cc/popular/all.file.json", function(data) {
+	$.get("https://prefix.cc/popular/all.file.json", function(data) {
 		var prefixArray = [];
 		for ( var prefix in data) {
 			if (prefix == "bif")