diff --git a/cellbase-app/src/main/java/org/opencb/cellbase/app/cli/admin/executors/ExportCommandExecutor.java b/cellbase-app/src/main/java/org/opencb/cellbase/app/cli/admin/executors/ExportCommandExecutor.java
index 72f992f344..f46f5bad6d 100644
--- a/cellbase-app/src/main/java/org/opencb/cellbase/app/cli/admin/executors/ExportCommandExecutor.java
+++ b/cellbase-app/src/main/java/org/opencb/cellbase/app/cli/admin/executors/ExportCommandExecutor.java
@@ -194,7 +194,7 @@ public void execute() throws CellBaseException {
                         case EtlCommons.VARIATION_FUNCTIONAL_SCORE_DATA: {
                             // Export data
                             VariantManager variantManager = managerFactory.getVariantManager(species, assembly);
-                            CellBaseDataResult<GenomicScoreRegion> results = variantManager.getFunctionalScoreRegion(regions, null,
+                            CellBaseDataResult<GenomicScoreRegion> results = variantManager.getFunctionalScoreRegion(regions, null, apiKey,
                                     dataRelease);
                             counter = writeExportedData(results.getResults(), "cadd", output);
                             counterMsg = counter + " CADD items";
diff --git a/cellbase-core/src/main/java/org/opencb/cellbase/core/api/key/ApiKeyLicensedDataUtils.java b/cellbase-core/src/main/java/org/opencb/cellbase/core/api/key/ApiKeyLicensedDataUtils.java
index e131a4eeee..be837af69c 100644
--- a/cellbase-core/src/main/java/org/opencb/cellbase/core/api/key/ApiKeyLicensedDataUtils.java
+++ b/cellbase-core/src/main/java/org/opencb/cellbase/core/api/key/ApiKeyLicensedDataUtils.java
@@ -35,6 +35,10 @@ public final class ApiKeyLicensedDataUtils {
     public static final Set<String> LICENSED_CLINICAL_DATA = new HashSet<>(Arrays.asList("cosmic", "hgmd"));
     public static final Set<String> UNLICENSED_CLINICAL_DATA = new HashSet<>(Collections.singletonList("clinvar"));
 
+    public static final int NUM_VARIANT_FUNCTIONAL_SCORE_SOURCES = 1;
+    public static final Set<String> LICENSED_VARIANT_FUNCTIONAL_SCORE_SOURCES = new HashSet<>(Collections.singletonList("cadd"));
+
+
     private ApiKeyLicensedDataUtils() {
     }
 
diff --git a/cellbase-lib/src/main/java/org/opencb/cellbase/lib/managers/VariantManager.java b/cellbase-lib/src/main/java/org/opencb/cellbase/lib/managers/VariantManager.java
index 28f5c70fa7..bc2c7c4fa4 100644
--- a/cellbase-lib/src/main/java/org/opencb/cellbase/lib/managers/VariantManager.java
+++ b/cellbase-lib/src/main/java/org/opencb/cellbase/lib/managers/VariantManager.java
@@ -35,6 +35,7 @@
 import org.opencb.cellbase.core.models.DataRelease;
 import org.opencb.cellbase.core.result.CellBaseDataResult;
 import org.opencb.cellbase.core.variant.AnnotationBasedPhasedQueryManager;
+import org.opencb.cellbase.lib.EtlCommons;
 import org.opencb.cellbase.lib.impl.core.CellBaseCoreDBAdaptor;
 import org.opencb.cellbase.lib.impl.core.SpliceScoreMongoDBAdaptor;
 import org.opencb.cellbase.lib.impl.core.VariantMongoDBAdaptor;
@@ -43,6 +44,7 @@
 import org.opencb.cellbase.lib.variant.annotation.CellBaseNormalizerSequenceAdaptor;
 import org.opencb.cellbase.lib.variant.annotation.VariantAnnotationCalculator;
 import org.opencb.cellbase.lib.variant.hgvs.HgvsCalculator;
+import org.opencb.commons.datastore.core.Event;
 import org.opencb.commons.datastore.core.Query;
 import org.opencb.commons.datastore.core.QueryOptions;
 
@@ -288,17 +290,24 @@ public List<CellBaseDataResult> getByRegion(Query query, QueryOptions queryOptio
         return queryResults;
     }
 
-    public CellBaseDataResult<Score> getFunctionalScoreVariant(Variant variant, QueryOptions queryOptions, int dataRelease)
+    public CellBaseDataResult<Score> getFunctionalScoreVariant(Variant variant, QueryOptions queryOptions, String apiKey, int dataRelease)
             throws CellBaseException {
-        return variantDBAdaptor.getFunctionalScoreVariant(variant, queryOptions, dataRelease);
+        Set<String> validSources = apiKeyManager.getValidSources(apiKey, null);
+        if (validSources.contains(EtlCommons.CADD_DATA)) {
+            return variantDBAdaptor.getFunctionalScoreVariant(variant, queryOptions, dataRelease);
+        } else {
+            return new CellBaseDataResult<>(variant.toStringSimple(), 0, Collections.singletonList(new Event(Event.Type.WARNING,
+                    "Your current API key does not grant access to CADD data")), 0);
+        }
     }
 
-    public List<CellBaseDataResult<Score>> getFunctionalScoreVariant(List<Variant> variants, QueryOptions options, int dataRelease)
+    public List<CellBaseDataResult<Score>> getFunctionalScoreVariant(List<Variant> variants, QueryOptions options, String apiKey,
+                                                                     int dataRelease)
             throws CellBaseException {
         List<CellBaseDataResult<Score>> cellBaseDataResults = new ArrayList<>(variants.size());
         for (Variant variant: variants) {
             if (variant.getType() == VariantType.SNV) {
-                cellBaseDataResults.add(getFunctionalScoreVariant(variant, options, dataRelease));
+                cellBaseDataResults.add(getFunctionalScoreVariant(variant, options, apiKey, dataRelease));
             } else {
                 cellBaseDataResults.add(new CellBaseDataResult<>(variant.toString(), 0, Collections.emptyList(), 0));
             }
@@ -344,13 +353,19 @@ public List<CellBaseDataResult<SpliceScore>> getSpliceScoreVariant(List<Variant>
     }
 
     public CellBaseDataResult<GenomicScoreRegion> getFunctionalScoreRegion(List<Region> regions, CellBaseQueryOptions options,
-                                                                           int dataRelease)
+                                                                           String apiKey, int dataRelease)
             throws CellBaseException {
         Set<String> chunkIdSet = new HashSet<>();
-        for (Region region : regions) {
-            chunkIdSet.addAll(variantDBAdaptor.getFunctionalScoreChunkIds(region));
-        }
 
-        return variantDBAdaptor.getFunctionalScoreRegion(new ArrayList<>(chunkIdSet), options, dataRelease);
+        Set<String> validSources = apiKeyManager.getValidSources(apiKey, null);
+        if (validSources.contains(EtlCommons.CADD_DATA)) {
+            for (Region region : regions) {
+                chunkIdSet.addAll(variantDBAdaptor.getFunctionalScoreChunkIds(region));
+            }
+            return variantDBAdaptor.getFunctionalScoreRegion(new ArrayList<>(chunkIdSet), options, dataRelease);
+        } else {
+            return new CellBaseDataResult<>("", 0, Collections.singletonList(new Event(Event.Type.WARNING, "Your current API key does not"
+                    + " grant access to CADD data.")), 0);
+        }
     }
 }
diff --git a/cellbase-lib/src/main/java/org/opencb/cellbase/lib/variant/annotation/VariantAnnotationCalculator.java b/cellbase-lib/src/main/java/org/opencb/cellbase/lib/variant/annotation/VariantAnnotationCalculator.java
index a503ba7045..ed804ca721 100644
--- a/cellbase-lib/src/main/java/org/opencb/cellbase/lib/variant/annotation/VariantAnnotationCalculator.java
+++ b/cellbase-lib/src/main/java/org/opencb/cellbase/lib/variant/annotation/VariantAnnotationCalculator.java
@@ -1679,7 +1679,7 @@ public List<CellBaseDataResult<Score>> call() throws Exception {
             long startTime = System.currentTimeMillis();
             logger.debug("Query variant functional score");
             List<CellBaseDataResult<Score>> variantFunctionalScoreCellBaseDataResultList =
-                    variantManager.getFunctionalScoreVariant(variantList, queryOptions, dataRelease);
+                    variantManager.getFunctionalScoreVariant(variantList, queryOptions, apiKey, dataRelease);
             logger.debug("VariantFunctionalScore query performance is {}ms for {} variants",
                     System.currentTimeMillis() - startTime, variantList.size());
             return variantFunctionalScoreCellBaseDataResultList;
diff --git a/cellbase-lib/src/test/java/org/opencb/cellbase/lib/GenericMongoDBAdaptorTest.java b/cellbase-lib/src/test/java/org/opencb/cellbase/lib/GenericMongoDBAdaptorTest.java
index 1b217c671d..4c709f97f5 100644
--- a/cellbase-lib/src/test/java/org/opencb/cellbase/lib/GenericMongoDBAdaptorTest.java
+++ b/cellbase-lib/src/test/java/org/opencb/cellbase/lib/GenericMongoDBAdaptorTest.java
@@ -79,6 +79,7 @@ public class GenericMongoDBAdaptorTest {
     protected String HGMD_COSMIC_ACCESS_API_KEY = "eyJhbGciOiJIUzI1NiJ9.eyJzb3VyY2VzIjp7ImNvc21pYyI6OTIyMzM3MjAzNjg1NDc3NTgwNywiaGdtZCI6OTIyMzM3MjAzNjg1NDc3NTgwN30sIm1heE51bVF1ZXJpZXMiOjEwMDAwMDAwLCJ2ZXJzaW9uIjoiMS4wIiwic3ViIjoiVEVTVCIsImlhdCI6MTY4OTgzNzQ5OX0.ZsTxFaSzsLwyQMLwNIODerfaOTLywoRwkxvpsnjVTSE";
     protected String HGMD_SPLICEAI_ACCESS_API_KEY = "eyJhbGciOiJIUzI1NiJ9.eyJzb3VyY2VzIjp7ImhnbWQiOjkyMjMzNzIwMzY4NTQ3NzU4MDcsInNwbGljZWFpIjo5MjIzMzcyMDM2ODU0Nzc1ODA3fSwibWF4TnVtUXVlcmllcyI6MTAwMDAwMDAsInZlcnNpb24iOiIxLjAiLCJzdWIiOiJURVNUIiwiaWF0IjoxNjg5ODM3NTE4fQ.rDH2BR2EkUgs3fz7hAuCbmAHgE0rHmp9JhD-5gFZmfI";
     protected String COSMIC_SPLICEAI_ACCESS_API_KEY = "eyJhbGciOiJIUzI1NiJ9.eyJzb3VyY2VzIjp7ImNvc21pYyI6OTIyMzM3MjAzNjg1NDc3NTgwNywic3BsaWNlYWkiOjkyMjMzNzIwMzY4NTQ3NzU4MDd9LCJtYXhOdW1RdWVyaWVzIjoxMDAwMDAwMCwidmVyc2lvbiI6IjEuMCIsInN1YiI6IlRFU1QiLCJpYXQiOjE2ODk4Mzc1MzZ9.CkXvpNg0NWAXL3N06R2gCqe0kF4ptBk0MPvaAdDSEpQ";
+    protected String HGMD_CADD_ACCESS_API_KEY = "eyJhbGciOiJIUzI1NiJ9.eyJzdWIiOiJaRVRUQS1URVNUSU5HIiwidmVyc2lvbiI6IjEuMCIsImlhdCI6MTcyMTMxNTg4MCwic291cmNlcyI6eyJjYWRkIjozMTQ5NDc4NDY5MDgwMDAwMCwiaGdtZCI6MzE0OTQ3ODQ2OTA4MDAwMDB9LCJxdW90YSI6eyJtYXhOdW1RdWVyaWVzIjoxMDAwMDAwMH19.kMCyzs6lMo44e-rlDTlZ1lucK1jEKVS0bl5MBOh6Ekg";
 
     protected LoadRunner loadRunner = null;
 
diff --git a/cellbase-lib/src/test/java/org/opencb/cellbase/lib/impl/core/VariantAnnotationCalculatorTest.java b/cellbase-lib/src/test/java/org/opencb/cellbase/lib/impl/core/VariantAnnotationCalculatorTest.java
index b973f0b996..263e5d7395 100644
--- a/cellbase-lib/src/test/java/org/opencb/cellbase/lib/impl/core/VariantAnnotationCalculatorTest.java
+++ b/cellbase-lib/src/test/java/org/opencb/cellbase/lib/impl/core/VariantAnnotationCalculatorTest.java
@@ -2129,6 +2129,33 @@ public void testLicensedDataCosmicSpliceApiKeyAnnotation() throws Exception {
         }
     }
 
+    @Test
+    public void testCaddApiKeyAnnotation() throws Exception {
+        QueryOptions queryOptions = new QueryOptions("useCache", false);
+        queryOptions.put("exclude", "pharmacogenomics");
+        queryOptions.put("normalize", true);
+
+        variantAnnotationCalculator.setApiKey(HGMD_CADD_ACCESS_API_KEY);
+
+        Variant variant = Variant.parseVariant("X:32896535:A:T");
+        CellBaseDataResult<VariantAnnotation> cellBaseDataResult = variantAnnotationCalculator.getAnnotationByVariant(variant, queryOptions);
+        VariantAnnotation variantAnnotation = cellBaseDataResult.first();
+        assertTrue(variantAnnotation.getFunctionalScore().size() > 0);
+    }
+
+    @Test
+    public void testNoCaddApiKeyAnnotation() throws Exception {
+        QueryOptions queryOptions = new QueryOptions("useCache", false);
+        queryOptions.put("exclude", "pharmacogenomics");
+        queryOptions.put("normalize", true);
+
+        variantAnnotationCalculator.setApiKey(SPLICEAI_ACCESS_API_KEY);
+
+        Variant variant = Variant.parseVariant("X:32896535:A:T");
+        CellBaseDataResult<VariantAnnotation> cellBaseDataResult = variantAnnotationCalculator.getAnnotationByVariant(variant, queryOptions);
+        VariantAnnotation variantAnnotation = cellBaseDataResult.first();
+        assertTrue(CollectionUtils.isEmpty(variantAnnotation.getFunctionalScore()));
+    }
 
     private boolean containTraitAssociation(VariantAnnotation variantAnnotation, String source) {
         if (variantAnnotation == null) {
diff --git a/cellbase-lib/src/test/java/org/opencb/cellbase/lib/impl/core/VariantMongoDBAdaptorTest.java b/cellbase-lib/src/test/java/org/opencb/cellbase/lib/impl/core/VariantMongoDBAdaptorTest.java
index 5a47e04d4b..7ab89a230a 100644
--- a/cellbase-lib/src/test/java/org/opencb/cellbase/lib/impl/core/VariantMongoDBAdaptorTest.java
+++ b/cellbase-lib/src/test/java/org/opencb/cellbase/lib/impl/core/VariantMongoDBAdaptorTest.java
@@ -22,6 +22,7 @@
 import org.opencb.biodata.models.variant.VariantBuilder;
 import org.opencb.biodata.models.variant.avro.PopulationFrequency;
 import org.opencb.biodata.models.variant.avro.SampleEntry;
+import org.opencb.biodata.models.variant.avro.Score;
 import org.opencb.cellbase.core.ParamConstants;
 import org.opencb.cellbase.core.api.VariantQuery;
 import org.opencb.cellbase.core.api.query.LogicalList;
@@ -37,6 +38,7 @@
 import java.util.Collections;
 import java.util.List;
 
+import static org.junit.Assert.assertTrue;
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertNotNull;
 
@@ -54,15 +56,44 @@ public VariantMongoDBAdaptorTest() throws Exception {
         variantManager = cellBaseManagerFactory.getVariantManager(SPECIES, ASSEMBLY);
     }
 
-    // TODO: to be finished - properly implemented
-    @Disabled
     @Test
-    public void testGetFunctionalScoreVariant() throws Exception {
-//        VariantMongoDBAdaptor variationDBAdaptor = dbAdaptorFactory.getVariationDBAdaptor("hsapiens", "GRCh37");
-        CellBaseDataResult functionalScoreVariant = variantManager.getFunctionalScoreVariant(Variant.parseVariant("10:130862563:A:G"),
-                new QueryOptions(), dataRelease.getRelease());
+    public void testGetFunctionalScoreVariantValidApiKey() throws Exception {
+        Variant variant = Variant.parseVariant("X:32896535:A:T");
+        CellBaseDataResult functionalScoreVariant = variantManager.getFunctionalScoreVariant(variant, new QueryOptions(),
+                HGMD_CADD_ACCESS_API_KEY, dataRelease.getRelease());
+
+        assertEquals(2, functionalScoreVariant.getNumResults());
+    }
+
+    @Test
+    public void testGetFunctionalScoreVariantInvalidApiKey() throws Exception {
+        Variant variant = Variant.parseVariant("X:32896535:A:T");
+        CellBaseDataResult functionalScoreVariant = variantManager.getFunctionalScoreVariant(variant, new QueryOptions(),
+                SPLICEAI_ACCESS_API_KEY, dataRelease.getRelease());
+
+        assertEquals(0, functionalScoreVariant.getNumResults());
+        System.out.println("functionalScoreVariant.getEvents() = " + functionalScoreVariant.getEvents());
+    }
 
-        System.out.println("Num. of results: " + functionalScoreVariant.getNumResults());
+    @Test
+    public void testGetFunctionalScoreVariantListValidApiKey() throws Exception {
+        List<Variant> variants = Arrays.asList(Variant.parseVariant("X:32896417:T:G"), Variant.parseVariant("X:32896535:A:T"));
+        List<CellBaseDataResult<Score>> functionalScoreVariantList = variantManager.getFunctionalScoreVariant(variants, new QueryOptions(),
+                HGMD_CADD_ACCESS_API_KEY, dataRelease.getRelease());
+        for (CellBaseDataResult<Score> functionalScoreVariant : functionalScoreVariantList) {
+            assertTrue(functionalScoreVariant.getNumResults() > 0);
+        }
+    }
+
+    @Test
+    public void testGetFunctionalScoreVariantListInvalidApiKey() throws Exception {
+        List<Variant> variants = Arrays.asList(Variant.parseVariant("X:32896417:T:G"), Variant.parseVariant("X:32896535:A:T"));
+        List<CellBaseDataResult<Score>> functionalScoreVariantList = variantManager.getFunctionalScoreVariant(variants, new QueryOptions(),
+                HGMD_SPLICEAI_ACCESS_API_KEY, dataRelease.getRelease());
+        for (CellBaseDataResult<Score> functionalScoreVariant : functionalScoreVariantList) {
+            assertEquals(0, functionalScoreVariant.getNumResults());
+            System.out.println("functionalScoreVariant.getEvents() = " + functionalScoreVariant.getEvents());
+        }
     }
 
     @Test