diff --git a/dnet-ariadneplus-graphdb-publisher/src/main/java/eu/dnetlib/ariadneplus/graphdb/GraphDBClient.java b/dnet-ariadneplus-graphdb-publisher/src/main/java/eu/dnetlib/ariadneplus/graphdb/GraphDBClient.java
index 2d7e8f9..9a8b78c 100644
--- a/dnet-ariadneplus-graphdb-publisher/src/main/java/eu/dnetlib/ariadneplus/graphdb/GraphDBClient.java
+++ b/dnet-ariadneplus-graphdb-publisher/src/main/java/eu/dnetlib/ariadneplus/graphdb/GraphDBClient.java
@@ -395,9 +395,10 @@ public class GraphDBClient {
 		return identifiers;
 	}
 
-	public String indexOnESByIdentifiers(String datasource, String collectionId, String resourceType, List <String> identifiers) throws AriadnePlusPublisherException {
+	public String indexOnESByIdentifier(String datasource, String collectionId, String resourceType, String identifier) throws AriadnePlusPublisherException {
 		String report = "";
 		try {
+			List <String> identifiers = Arrays.asList(identifier);
 			log.info("Start indexing from "+ datasource + " " + collectionId);
 			runSPQRLQuery.setupConnection( getWriterUser(), getWriterPwd(), this.graphDBServerUrl, getRepository());
 			runSPQRLQuery.setParser(parseRDFJSON);
diff --git a/dnet-ariadneplus-graphdb-publisher/src/main/java/eu/dnetlib/ariadneplus/publisher/AriadnePlusPublisherController.java b/dnet-ariadneplus-graphdb-publisher/src/main/java/eu/dnetlib/ariadneplus/publisher/AriadnePlusPublisherController.java
index 98f2ad5..37bd0a5 100644
--- a/dnet-ariadneplus-graphdb-publisher/src/main/java/eu/dnetlib/ariadneplus/publisher/AriadnePlusPublisherController.java
+++ b/dnet-ariadneplus-graphdb-publisher/src/main/java/eu/dnetlib/ariadneplus/publisher/AriadnePlusPublisherController.java
@@ -83,10 +83,10 @@ public class AriadnePlusPublisherController {
 				resourceType, getTarget(DEFAULT_TARGET_ENDPOINT));
 	}
 
-	@RequestMapping(value = "/indexOnESByIdentifiers", method = RequestMethod.POST)
-	public String indexOnESByIdentifiers(@RequestParam final String datasource, @RequestParam final String collectionId,
-										 @RequestParam String resourceType, @RequestParam List<String> identifiers) throws AriadnePlusPublisherException {
-		return getAriadnePlusPublisherHelper().indexOnESByIdentifiers(datasource, collectionId,
-				resourceType, identifiers, getTarget(DEFAULT_TARGET_ENDPOINT));
+	@RequestMapping(value = "/indexOnESByIdentifier", method = RequestMethod.POST)
+	public String indexOnESByIdentifier(@RequestParam final String datasource, @RequestParam final String collectionId,
+										 @RequestParam String resourceType, @RequestParam String identifier) throws AriadnePlusPublisherException {
+		return getAriadnePlusPublisherHelper().indexOnESByIdentifier(datasource, collectionId,
+				resourceType, identifier, getTarget(DEFAULT_TARGET_ENDPOINT));
 	}
 }
\ No newline at end of file
diff --git a/dnet-ariadneplus-graphdb-publisher/src/main/java/eu/dnetlib/ariadneplus/publisher/AriadnePlusPublisherHelper.java b/dnet-ariadneplus-graphdb-publisher/src/main/java/eu/dnetlib/ariadneplus/publisher/AriadnePlusPublisherHelper.java
index 6f8e526..368f18f 100644
--- a/dnet-ariadneplus-graphdb-publisher/src/main/java/eu/dnetlib/ariadneplus/publisher/AriadnePlusPublisherHelper.java
+++ b/dnet-ariadneplus-graphdb-publisher/src/main/java/eu/dnetlib/ariadneplus/publisher/AriadnePlusPublisherHelper.java
@@ -147,8 +147,8 @@ public class AriadnePlusPublisherHelper {
 		return graphDBClient.selectIdentifiers(datasource, collectionId, resourceType);
 	}
 
-	public String indexOnESByIdentifiers(String datasource, String collectionId, String resourceType, List<String> identifiers, AriadnePlusTargets target) throws AriadnePlusPublisherException {
+	public String indexOnESByIdentifier(String datasource, String collectionId, String resourceType, String identifier, AriadnePlusTargets target) throws AriadnePlusPublisherException {
 		GraphDBClient graphDBClient = this.graphdbClientFactory.getGraphDBClient();
-		return graphDBClient.indexOnESByIdentifiers(datasource, collectionId, resourceType, identifiers);
+		return graphDBClient.indexOnESByIdentifier(datasource, collectionId, resourceType, identifier);
 	}
 }