diff --git a/java/server/src/main/java/org/softwareheritage/graph/App.java b/java/server/src/main/java/org/softwareheritage/graph/App.java
--- a/java/server/src/main/java/org/softwareheritage/graph/App.java
+++ b/java/server/src/main/java/org/softwareheritage/graph/App.java
@@ -108,7 +108,7 @@
       String edgesFmt = ctx.queryParam("edges", "*");
 
       Endpoint endpoint = new Endpoint(graph, direction, edgesFmt);
-      Endpoint.Output output = endpoint.leaves(src);
+      Endpoint.Output output = endpoint.leaves(new Endpoint.Input(src));
       ctx.json(formatEndpointOutput(output, showTimings));
     });
 
@@ -118,7 +118,7 @@
       String edgesFmt = ctx.queryParam("edges", "*");
 
       Endpoint endpoint = new Endpoint(graph, direction, edgesFmt);
-      Endpoint.Output output = endpoint.neighbors(src);
+      Endpoint.Output output = endpoint.neighbors(new Endpoint.Input(src));
       ctx.json(formatEndpointOutput(output, showTimings));
     });
 
@@ -128,7 +128,7 @@
       String edgesFmt = ctx.queryParam("edges", "*");
 
       Endpoint endpoint = new Endpoint(graph, direction, edgesFmt);
-      Endpoint.Output output = endpoint.visitNodes(src);
+      Endpoint.Output output = endpoint.visitNodes(new Endpoint.Input(src));
       ctx.json(formatEndpointOutput(output, showTimings));
     });
 
@@ -138,7 +138,7 @@
       String edgesFmt = ctx.queryParam("edges", "*");
 
       Endpoint endpoint = new Endpoint(graph, direction, edgesFmt);
-      Endpoint.Output output = endpoint.visitPaths(src);
+      Endpoint.Output output = endpoint.visitPaths(new Endpoint.Input(src));
       ctx.json(formatEndpointOutput(output, showTimings));
     });
 
@@ -150,7 +150,7 @@
       String algorithm = ctx.queryParam("traversal", "dfs");
 
       Endpoint endpoint = new Endpoint(graph, direction, edgesFmt);
-      Endpoint.Output output = endpoint.walk(src, dstFmt, algorithm);
+      Endpoint.Output output = endpoint.walk(new Endpoint.Input(src, dstFmt, algorithm));
       ctx.json(formatEndpointOutput(output, showTimings));
     });
 
diff --git a/java/server/src/main/java/org/softwareheritage/graph/Endpoint.java b/java/server/src/main/java/org/softwareheritage/graph/Endpoint.java
--- a/java/server/src/main/java/org/softwareheritage/graph/Endpoint.java
+++ b/java/server/src/main/java/org/softwareheritage/graph/Endpoint.java
@@ -23,9 +23,34 @@
 
 public class Endpoint {
   /**
+   * Wrapper class to unify traversal methods input signatures.
+   */
+  public static class Input {
+    /** Source node of endpoint call specified as a {@link SwhPID} */
+    public SwhPID src;
+    /**
+     * Destination formatted string as described in the <a
+     * href="https://docs.softwareheritage.org/devel/swh-graph/api.html#walk">API</a>
+     */
+    public String dstFmt;
+    /** Traversal algorithm used in endpoint call (either "dfs" or "bfs") */
+    public String algorithm;
+
+    public Input(SwhPID src) {
+      this.src = src;
+    }
+
+    public Input(SwhPID src, String dstFmt, String algorithm) {
+      this.src = src;
+      this.dstFmt = dstFmt;
+      this.algorithm = algorithm;
+    }
+  }
+
+  /**
    * Wrapper class to return both the endpoint result and metadata (such as timings).
    */
-  public class Output<T> {
+  public static class Output<T> {
     /** The result content itself */
     public T result;
     /** Various metadata about the result */
@@ -129,17 +154,17 @@
   /**
    * Leaves endpoint wrapper.
    *
-   * @param src source node of endpoint call specified as a {@link SwhPID}
+   * @param input input parameters for the underlying endpoint call
    * @return the resulting list of {@link SwhPID} from endpoint call and operation metadata
    * @see org.softwareheritage.graph.SwhPID
    * @see org.softwareheritage.graph.algo.Traversal#leaves(long)
    */
-  public Output leaves(SwhPID src) {
+  public Output leaves(Input input) {
     Output<ArrayList<SwhPID>> output = new Output<>();
     long startTime;
 
     startTime = Timing.start();
-    long srcNodeId = graph.getNodeId(src);
+    long srcNodeId = graph.getNodeId(input.src);
     output.meta.timings.pid2node = Timing.stop(startTime);
 
     startTime = Timing.start();
@@ -157,17 +182,17 @@
   /**
    * Neighbors endpoint wrapper.
    *
-   * @param src source node of endpoint call specified as a {@link SwhPID}
+   * @param input input parameters for the underlying endpoint call
    * @return the resulting list of {@link SwhPID} from endpoint call and operation metadata
    * @see org.softwareheritage.graph.SwhPID
    * @see org.softwareheritage.graph.algo.Traversal#neighbors(long)
    */
-  public Output neighbors(SwhPID src) {
+  public Output neighbors(Input input) {
     Output<ArrayList<SwhPID>> output = new Output<>();
     long startTime;
 
     startTime = Timing.start();
-    long srcNodeId = graph.getNodeId(src);
+    long srcNodeId = graph.getNodeId(input.src);
     output.meta.timings.pid2node = Timing.stop(startTime);
 
     startTime = Timing.start();
@@ -185,39 +210,36 @@
   /**
    * Walk endpoint wrapper.
    *
-   * @param src source node of endpoint call specified as a {@link SwhPID}
-   * @param dstFmt destination formatted string as described in the <a
-   * href="https://docs.softwareheritage.org/devel/swh-graph/api.html#walk">API</a>
-   * @param algorithm traversal algorithm used in endpoint call (either "dfs" or "bfs")
+   * @param input input parameters for the underlying endpoint call
    * @return the resulting {@link SwhPath} from endpoint call and operation metadata
    * @see org.softwareheritage.graph.SwhPID
    * @see org.softwareheritage.graph.SwhPath
    * @see org.softwareheritage.graph.algo.Traversal#walk
    */
-  public Output walk(SwhPID src, String dstFmt, String algorithm) {
+  public Output walk(Input input) {
     Output<SwhPath> output = new Output<>();
     long startTime;
 
     startTime = Timing.start();
-    long srcNodeId = graph.getNodeId(src);
+    long srcNodeId = graph.getNodeId(input.src);
     output.meta.timings.pid2node = Timing.stop(startTime);
 
     ArrayList<Long> nodeIds = new ArrayList<Long>();
 
     // Destination is either a SWH PID or a node type
     try {
-      SwhPID dstSwhPID = new SwhPID(dstFmt);
+      SwhPID dstSwhPID = new SwhPID(input.dstFmt);
       long dstNodeId = graph.getNodeId(dstSwhPID);
 
       startTime = Timing.start();
-      nodeIds = traversal.walk(srcNodeId, dstNodeId, algorithm);
+      nodeIds = traversal.walk(srcNodeId, dstNodeId, input.algorithm);
       output.meta.timings.traversal = Timing.stop(startTime);
     } catch (IllegalArgumentException ignored1) {
       try {
-        Node.Type dstType = Node.Type.fromStr(dstFmt);
+        Node.Type dstType = Node.Type.fromStr(input.dstFmt);
 
         startTime = Timing.start();
-        nodeIds = traversal.walk(srcNodeId, dstType, algorithm);
+        nodeIds = traversal.walk(srcNodeId, dstType, input.algorithm);
         output.meta.timings.traversal = Timing.stop(startTime);
       } catch (IllegalArgumentException ignored2) {
       }
@@ -235,17 +257,17 @@
   /**
    * VisitNodes endpoint wrapper.
    *
-   * @param src source node of endpoint call specified as a {@link SwhPID}
+   * @param input input parameters for the underlying endpoint call
    * @return the resulting list of {@link SwhPID} from endpoint call and operation metadata
    * @see org.softwareheritage.graph.SwhPID
    * @see org.softwareheritage.graph.algo.Traversal#visitNodes(long)
    */
-  public Output visitNodes(SwhPID src) {
+  public Output visitNodes(Input input) {
     Output<ArrayList<SwhPID>> output = new Output<>();
     long startTime;
 
     startTime = Timing.start();
-    long srcNodeId = graph.getNodeId(src);
+    long srcNodeId = graph.getNodeId(input.src);
     output.meta.timings.pid2node = Timing.stop(startTime);
 
     startTime = Timing.start();
@@ -263,18 +285,18 @@
   /**
    * VisitPaths endpoint wrapper.
    *
-   * @param src source node of endpoint call specified as a {@link SwhPID}
+   * @param input input parameters for the underlying endpoint call
    * @return the resulting list of {@link SwhPath} from endpoint call and operation metadata
    * @see org.softwareheritage.graph.SwhPID
    * @see org.softwareheritage.graph.SwhPath
    * @see org.softwareheritage.graph.algo.Traversal#visitPaths(long)
    */
-  public Output visitPaths(SwhPID src) {
+  public Output visitPaths(Input input) {
     Output<ArrayList<SwhPath>> output = new Output<>();
     long startTime;
 
     startTime = Timing.start();
-    long srcNodeId = graph.getNodeId(src);
+    long srcNodeId = graph.getNodeId(input.src);
     output.meta.timings.pid2node = Timing.stop(startTime);
 
     startTime = Timing.start();
diff --git a/java/server/src/main/java/org/softwareheritage/graph/benchmark/Common.java b/java/server/src/main/java/org/softwareheritage/graph/benchmark/Common.java
--- a/java/server/src/main/java/org/softwareheritage/graph/benchmark/Common.java
+++ b/java/server/src/main/java/org/softwareheritage/graph/benchmark/Common.java
@@ -23,16 +23,21 @@
    * @param graph compressed graph used in the benchmark
    * @param nodeIds node ids to use as starting point for the endpoint traversal
    * @param operation endpoint function to benchmark
+   * @param dstFmt destination formatted string as described in the <a
+   * href="https://docs.softwareheritage.org/devel/swh-graph/api.html#walk">API</a>
+   * @param algorithm traversal algorithm used in endpoint call (either "dfs" or "bfs")
    */
-  public static void timeEndpoint(
-      Graph graph, long[] nodeIds, Function<SwhPID, Endpoint.Output> operation) {
+  public static void timeEndpoint(Graph graph, long[] nodeIds,
+      Function<Endpoint.Input, Endpoint.Output> operation, String dstFmt, String algorithm) {
     ArrayList<Double> timings = new ArrayList<>();
     ArrayList<Double> timingsNormalized = new ArrayList<>();
 
     for (long nodeId : nodeIds) {
       SwhPID swhPID = graph.getSwhPID(nodeId);
 
-      Endpoint.Output output = operation.apply(swhPID);
+      Endpoint.Output output = (dstFmt == null)
+          ? operation.apply(new Endpoint.Input(swhPID))
+          : operation.apply(new Endpoint.Input(swhPID, dstFmt, algorithm));
 
       timings.add(output.meta.timings.traversal);
       if (output.meta.nbEdgesAccessed != 0) {
@@ -48,4 +53,12 @@
     Statistics statsNormalized = new Statistics(timingsNormalized);
     statsNormalized.printAll();
   }
+
+  /**
+   * Same as {@link timeEndpoint} but without destination or algorithm specified to endpoint call.
+   */
+  public static void timeEndpoint(
+      Graph graph, long[] nodeIds, Function<Endpoint.Input, Endpoint.Output> operation) {
+    timeEndpoint(graph, nodeIds, operation, null, null);
+  }
 }
diff --git a/java/server/src/test/java/org/softwareheritage/graph/LeavesTest.java b/java/server/src/test/java/org/softwareheritage/graph/LeavesTest.java
--- a/java/server/src/test/java/org/softwareheritage/graph/LeavesTest.java
+++ b/java/server/src/test/java/org/softwareheritage/graph/LeavesTest.java
@@ -24,7 +24,8 @@
     expectedLeaves.add(new SwhPID("swh:1:cnt:0000000000000000000000000000000000000005"));
     expectedLeaves.add(new SwhPID("swh:1:cnt:0000000000000000000000000000000000000007"));
 
-    GraphTest.assertEqualsAnyOrder(expectedLeaves, (ArrayList) endpoint.leaves(src).result);
+    ArrayList<SwhPID> actualLeaves = (ArrayList) endpoint.leaves(new Endpoint.Input(src)).result;
+    GraphTest.assertEqualsAnyOrder(expectedLeaves, actualLeaves);
   }
 
   @Test
@@ -42,7 +43,8 @@
     expectedLeaves.add(new SwhPID("swh:1:cnt:0000000000000000000000000000000000000007"));
     expectedLeaves.add(new SwhPID("swh:1:cnt:0000000000000000000000000000000000000011"));
 
-    GraphTest.assertEqualsAnyOrder(expectedLeaves, (ArrayList) endpoint.leaves(src).result);
+    ArrayList<SwhPID> actualLeaves = (ArrayList) endpoint.leaves(new Endpoint.Input(src)).result;
+    GraphTest.assertEqualsAnyOrder(expectedLeaves, actualLeaves);
   }
 
   @Test
@@ -53,13 +55,15 @@
     SwhPID src1 = new SwhPID("swh:1:cnt:0000000000000000000000000000000000000015");
     ArrayList<SwhPID> expectedLeaves1 = new ArrayList<>();
     expectedLeaves1.add(new SwhPID("swh:1:rel:0000000000000000000000000000000000000019"));
-    GraphTest.assertEqualsAnyOrder(expectedLeaves1, (ArrayList) endpoint.leaves(src1).result);
+    ArrayList<SwhPID> actualLeaves1 = (ArrayList) endpoint.leaves(new Endpoint.Input(src1)).result;
+    GraphTest.assertEqualsAnyOrder(expectedLeaves1, actualLeaves1);
 
     SwhPID src2 = new SwhPID("swh:1:cnt:0000000000000000000000000000000000000004");
     ArrayList<SwhPID> expectedLeaves2 = new ArrayList<>();
     expectedLeaves2.add(new SwhPID("swh:1:ori:0000000000000000000000000000000000000021"));
     expectedLeaves2.add(new SwhPID("swh:1:rel:0000000000000000000000000000000000000019"));
-    GraphTest.assertEqualsAnyOrder(expectedLeaves2, (ArrayList) endpoint.leaves(src2).result);
+    ArrayList<SwhPID> actualLeaves2 = (ArrayList) endpoint.leaves(new Endpoint.Input(src2)).result;
+    GraphTest.assertEqualsAnyOrder(expectedLeaves2, actualLeaves2);
   }
 
   @Test
@@ -71,7 +75,8 @@
     ArrayList<SwhPID> expectedLeaves = new ArrayList<>();
     expectedLeaves.add(new SwhPID("swh:1:rev:0000000000000000000000000000000000000003"));
 
-    GraphTest.assertEqualsAnyOrder(expectedLeaves, (ArrayList) endpoint.leaves(src).result);
+    ArrayList<SwhPID> actualLeaves = (ArrayList) endpoint.leaves(new Endpoint.Input(src)).result;
+    GraphTest.assertEqualsAnyOrder(expectedLeaves, actualLeaves);
   }
 
   @Test
@@ -86,7 +91,8 @@
     expectedLeaves.add(new SwhPID("swh:1:cnt:0000000000000000000000000000000000000001"));
     expectedLeaves.add(new SwhPID("swh:1:cnt:0000000000000000000000000000000000000007"));
 
-    GraphTest.assertEqualsAnyOrder(expectedLeaves, (ArrayList) endpoint.leaves(src).result);
+    ArrayList<SwhPID> actualLeaves = (ArrayList) endpoint.leaves(new Endpoint.Input(src)).result;
+    GraphTest.assertEqualsAnyOrder(expectedLeaves, actualLeaves);
   }
 
   @Test
@@ -98,6 +104,7 @@
     ArrayList<SwhPID> expectedLeaves = new ArrayList<>();
     expectedLeaves.add(new SwhPID("swh:1:dir:0000000000000000000000000000000000000012"));
 
-    GraphTest.assertEqualsAnyOrder(expectedLeaves, (ArrayList) endpoint.leaves(src).result);
+    ArrayList<SwhPID> actualLeaves = (ArrayList) endpoint.leaves(new Endpoint.Input(src)).result;
+    GraphTest.assertEqualsAnyOrder(expectedLeaves, actualLeaves);
   }
 }
diff --git a/java/server/src/test/java/org/softwareheritage/graph/NeighborsTest.java b/java/server/src/test/java/org/softwareheritage/graph/NeighborsTest.java
--- a/java/server/src/test/java/org/softwareheritage/graph/NeighborsTest.java
+++ b/java/server/src/test/java/org/softwareheritage/graph/NeighborsTest.java
@@ -19,23 +19,28 @@
 
     SwhPID src1 = new SwhPID("swh:1:ori:0000000000000000000000000000000000000021");
     Endpoint endpoint1 = new Endpoint(graph, "backward", "*");
-    GraphTest.assertEqualsAnyOrder(expectedNodes, (ArrayList) endpoint1.neighbors(src1).result);
+    ArrayList<SwhPID> actuals1 = (ArrayList) endpoint1.neighbors(new Endpoint.Input(src1)).result;
+    GraphTest.assertEqualsAnyOrder(expectedNodes, actuals1);
 
     SwhPID src2 = new SwhPID("swh:1:cnt:0000000000000000000000000000000000000004");
     Endpoint endpoint2 = new Endpoint(graph, "forward", "*");
-    GraphTest.assertEqualsAnyOrder(expectedNodes, (ArrayList) endpoint2.neighbors(src2).result);
+    ArrayList<SwhPID> actuals2 = (ArrayList) endpoint2.neighbors(new Endpoint.Input(src2)).result;
+    GraphTest.assertEqualsAnyOrder(expectedNodes, actuals2);
 
     SwhPID src3 = new SwhPID("swh:1:cnt:0000000000000000000000000000000000000015");
     Endpoint endpoint3 = new Endpoint(graph, "forward", "*");
-    GraphTest.assertEqualsAnyOrder(expectedNodes, (ArrayList) endpoint3.neighbors(src3).result);
+    ArrayList<SwhPID> actuals3 = (ArrayList) endpoint3.neighbors(new Endpoint.Input(src3)).result;
+    GraphTest.assertEqualsAnyOrder(expectedNodes, actuals3);
 
     SwhPID src4 = new SwhPID("swh:1:rel:0000000000000000000000000000000000000019");
     Endpoint endpoint4 = new Endpoint(graph, "backward", "*");
-    GraphTest.assertEqualsAnyOrder(expectedNodes, (ArrayList) endpoint4.neighbors(src4).result);
+    ArrayList<SwhPID> actuals4 = (ArrayList) endpoint4.neighbors(new Endpoint.Input(src4)).result;
+    GraphTest.assertEqualsAnyOrder(expectedNodes, actuals4);
 
     SwhPID src5 = new SwhPID("swh:1:dir:0000000000000000000000000000000000000008");
     Endpoint endpoint5 = new Endpoint(graph, "forward", "snp:*,rev:*,rel:*");
-    GraphTest.assertEqualsAnyOrder(expectedNodes, (ArrayList) endpoint5.neighbors(src5).result);
+    ArrayList<SwhPID> actuals5 = (ArrayList) endpoint5.neighbors(new Endpoint.Input(src5)).result;
+    GraphTest.assertEqualsAnyOrder(expectedNodes, actuals5);
   }
 
   @Test
@@ -46,31 +51,36 @@
     Endpoint endpoint1 = new Endpoint(graph, "forward", "*");
     ArrayList<SwhPID> expectedNodes1 = new ArrayList<>();
     expectedNodes1.add(new SwhPID("swh:1:dir:0000000000000000000000000000000000000002"));
-    GraphTest.assertEqualsAnyOrder(expectedNodes1, (ArrayList) endpoint1.neighbors(src1).result);
+    ArrayList<SwhPID> actuals1 = (ArrayList) endpoint1.neighbors(new Endpoint.Input(src1)).result;
+    GraphTest.assertEqualsAnyOrder(expectedNodes1, actuals1);
 
     SwhPID src2 = new SwhPID("swh:1:dir:0000000000000000000000000000000000000017");
     Endpoint endpoint2 = new Endpoint(graph, "forward", "dir:cnt");
     ArrayList<SwhPID> expectedNodes2 = new ArrayList<>();
     expectedNodes2.add(new SwhPID("swh:1:cnt:0000000000000000000000000000000000000014"));
-    GraphTest.assertEqualsAnyOrder(expectedNodes2, (ArrayList) endpoint2.neighbors(src2).result);
+    ArrayList<SwhPID> actuals2 = (ArrayList) endpoint2.neighbors(new Endpoint.Input(src2)).result;
+    GraphTest.assertEqualsAnyOrder(expectedNodes2, actuals2);
 
     SwhPID src3 = new SwhPID("swh:1:dir:0000000000000000000000000000000000000012");
     Endpoint endpoint3 = new Endpoint(graph, "backward", "*");
     ArrayList<SwhPID> expectedNodes3 = new ArrayList<>();
     expectedNodes3.add(new SwhPID("swh:1:rev:0000000000000000000000000000000000000013"));
-    GraphTest.assertEqualsAnyOrder(expectedNodes3, (ArrayList) endpoint3.neighbors(src3).result);
+    ArrayList<SwhPID> actuals3 = (ArrayList) endpoint3.neighbors(new Endpoint.Input(src3)).result;
+    GraphTest.assertEqualsAnyOrder(expectedNodes3, actuals3);
 
     SwhPID src4 = new SwhPID("swh:1:rev:0000000000000000000000000000000000000009");
     Endpoint endpoint4 = new Endpoint(graph, "backward", "rev:rev");
     ArrayList<SwhPID> expectedNodes4 = new ArrayList<>();
     expectedNodes4.add(new SwhPID("swh:1:rev:0000000000000000000000000000000000000013"));
-    GraphTest.assertEqualsAnyOrder(expectedNodes4, (ArrayList) endpoint4.neighbors(src4).result);
+    ArrayList<SwhPID> actuals4 = (ArrayList) endpoint4.neighbors(new Endpoint.Input(src4)).result;
+    GraphTest.assertEqualsAnyOrder(expectedNodes4, actuals4);
 
     SwhPID src5 = new SwhPID("swh:1:snp:0000000000000000000000000000000000000020");
     Endpoint endpoint5 = new Endpoint(graph, "backward", "*");
     ArrayList<SwhPID> expectedNodes5 = new ArrayList<>();
     expectedNodes5.add(new SwhPID("swh:1:ori:0000000000000000000000000000000000000021"));
-    GraphTest.assertEqualsAnyOrder(expectedNodes5, (ArrayList) endpoint5.neighbors(src5).result);
+    ArrayList<SwhPID> actuals5 = (ArrayList) endpoint5.neighbors(new Endpoint.Input(src5)).result;
+    GraphTest.assertEqualsAnyOrder(expectedNodes5, actuals5);
   }
 
   @Test
@@ -82,28 +92,32 @@
     ArrayList<SwhPID> expectedNodes1 = new ArrayList<>();
     expectedNodes1.add(new SwhPID("swh:1:rel:0000000000000000000000000000000000000010"));
     expectedNodes1.add(new SwhPID("swh:1:rev:0000000000000000000000000000000000000009"));
-    GraphTest.assertEqualsAnyOrder(expectedNodes1, (ArrayList) endpoint1.neighbors(src1).result);
+    ArrayList<SwhPID> actuals1 = (ArrayList) endpoint1.neighbors(new Endpoint.Input(src1)).result;
+    GraphTest.assertEqualsAnyOrder(expectedNodes1, actuals1);
 
     SwhPID src2 = new SwhPID("swh:1:dir:0000000000000000000000000000000000000008");
     Endpoint endpoint2 = new Endpoint(graph, "forward", "dir:cnt");
     ArrayList<SwhPID> expectedNodes2 = new ArrayList<>();
     expectedNodes2.add(new SwhPID("swh:1:cnt:0000000000000000000000000000000000000001"));
     expectedNodes2.add(new SwhPID("swh:1:cnt:0000000000000000000000000000000000000007"));
-    GraphTest.assertEqualsAnyOrder(expectedNodes2, (ArrayList) endpoint2.neighbors(src2).result);
+    ArrayList<SwhPID> actuals2 = (ArrayList) endpoint2.neighbors(new Endpoint.Input(src2)).result;
+    GraphTest.assertEqualsAnyOrder(expectedNodes2, actuals2);
 
     SwhPID src3 = new SwhPID("swh:1:cnt:0000000000000000000000000000000000000001");
     Endpoint endpoint3 = new Endpoint(graph, "backward", "*");
     ArrayList<SwhPID> expectedNodes3 = new ArrayList<>();
     expectedNodes3.add(new SwhPID("swh:1:dir:0000000000000000000000000000000000000008"));
     expectedNodes3.add(new SwhPID("swh:1:dir:0000000000000000000000000000000000000002"));
-    GraphTest.assertEqualsAnyOrder(expectedNodes3, (ArrayList) endpoint3.neighbors(src3).result);
+    ArrayList<SwhPID> actuals3 = (ArrayList) endpoint3.neighbors(new Endpoint.Input(src3)).result;
+    GraphTest.assertEqualsAnyOrder(expectedNodes3, actuals3);
 
     SwhPID src4 = new SwhPID("swh:1:rev:0000000000000000000000000000000000000009");
     Endpoint endpoint4 = new Endpoint(graph, "backward", "rev:snp,rev:rel");
     ArrayList<SwhPID> expectedNodes4 = new ArrayList<>();
     expectedNodes4.add(new SwhPID("swh:1:snp:0000000000000000000000000000000000000020"));
     expectedNodes4.add(new SwhPID("swh:1:rel:0000000000000000000000000000000000000010"));
-    GraphTest.assertEqualsAnyOrder(expectedNodes4, (ArrayList) endpoint4.neighbors(src4).result);
+    ArrayList<SwhPID> actuals4 = (ArrayList) endpoint4.neighbors(new Endpoint.Input(src4)).result;
+    GraphTest.assertEqualsAnyOrder(expectedNodes4, actuals4);
   }
 
   @Test
@@ -116,7 +130,8 @@
     expectedNodes1.add(new SwhPID("swh:1:dir:0000000000000000000000000000000000000006"));
     expectedNodes1.add(new SwhPID("swh:1:cnt:0000000000000000000000000000000000000001"));
     expectedNodes1.add(new SwhPID("swh:1:cnt:0000000000000000000000000000000000000007"));
-    GraphTest.assertEqualsAnyOrder(expectedNodes1, (ArrayList) endpoint1.neighbors(src1).result);
+    ArrayList<SwhPID> actuals1 = (ArrayList) endpoint1.neighbors(new Endpoint.Input(src1)).result;
+    GraphTest.assertEqualsAnyOrder(expectedNodes1, actuals1);
 
     SwhPID src2 = new SwhPID("swh:1:rev:0000000000000000000000000000000000000009");
     Endpoint endpoint2 = new Endpoint(graph, "backward", "*");
@@ -124,6 +139,7 @@
     expectedNodes2.add(new SwhPID("swh:1:snp:0000000000000000000000000000000000000020"));
     expectedNodes2.add(new SwhPID("swh:1:rel:0000000000000000000000000000000000000010"));
     expectedNodes2.add(new SwhPID("swh:1:rev:0000000000000000000000000000000000000013"));
-    GraphTest.assertEqualsAnyOrder(expectedNodes2, (ArrayList) endpoint2.neighbors(src2).result);
+    ArrayList<SwhPID> actuals2 = (ArrayList) endpoint2.neighbors(new Endpoint.Input(src2)).result;
+    GraphTest.assertEqualsAnyOrder(expectedNodes2, actuals2);
   }
 }
diff --git a/java/server/src/test/java/org/softwareheritage/graph/VisitTest.java b/java/server/src/test/java/org/softwareheritage/graph/VisitTest.java
--- a/java/server/src/test/java/org/softwareheritage/graph/VisitTest.java
+++ b/java/server/src/test/java/org/softwareheritage/graph/VisitTest.java
@@ -30,8 +30,8 @@
     Graph graph = getGraph();
     SwhPID swhPID = new SwhPID("swh:1:ori:0000000000000000000000000000000000000021");
     Endpoint endpoint = new Endpoint(graph, "forward", "*");
-    ArrayList<SwhPath> paths = (ArrayList) endpoint.visitPaths(swhPID).result;
-    ArrayList<SwhPID> nodes = (ArrayList) endpoint.visitNodes(swhPID).result;
+    ArrayList<SwhPath> paths = (ArrayList) endpoint.visitPaths(new Endpoint.Input(swhPID)).result;
+    ArrayList<SwhPID> nodes = (ArrayList) endpoint.visitNodes(new Endpoint.Input(swhPID)).result;
 
     ArrayList<SwhPath> expectedPaths = new ArrayList<SwhPath>();
     expectedPaths.add(
@@ -135,8 +135,8 @@
     Graph graph = getGraph();
     SwhPID swhPID = new SwhPID("swh:1:dir:0000000000000000000000000000000000000012");
     Endpoint endpoint = new Endpoint(graph, "forward", "*");
-    ArrayList<SwhPath> paths = (ArrayList) endpoint.visitPaths(swhPID).result;
-    ArrayList<SwhPID> nodes = (ArrayList) endpoint.visitNodes(swhPID).result;
+    ArrayList<SwhPath> paths = (ArrayList) endpoint.visitPaths(new Endpoint.Input(swhPID)).result;
+    ArrayList<SwhPID> nodes = (ArrayList) endpoint.visitNodes(new Endpoint.Input(swhPID)).result;
 
     ArrayList<SwhPath> expectedPaths = new ArrayList<SwhPath>();
     expectedPaths.add(
@@ -180,8 +180,8 @@
     Graph graph = getGraph();
     SwhPID swhPID = new SwhPID("swh:1:cnt:0000000000000000000000000000000000000004");
     Endpoint endpoint = new Endpoint(graph, "forward", "*");
-    ArrayList<SwhPath> paths = (ArrayList) endpoint.visitPaths(swhPID).result;
-    ArrayList<SwhPID> nodes = (ArrayList) endpoint.visitNodes(swhPID).result;
+    ArrayList<SwhPath> paths = (ArrayList) endpoint.visitPaths(new Endpoint.Input(swhPID)).result;
+    ArrayList<SwhPID> nodes = (ArrayList) endpoint.visitNodes(new Endpoint.Input(swhPID)).result;
 
     ArrayList<SwhPath> expectedPaths = new ArrayList<SwhPath>();
     expectedPaths.add(
@@ -198,8 +198,8 @@
     Graph graph = getGraph();
     SwhPID swhPID = new SwhPID("swh:1:ori:0000000000000000000000000000000000000021");
     Endpoint endpoint = new Endpoint(graph, "backward", "*");
-    ArrayList<SwhPath> paths = (ArrayList) endpoint.visitPaths(swhPID).result;
-    ArrayList<SwhPID> nodes = (ArrayList) endpoint.visitNodes(swhPID).result;
+    ArrayList<SwhPath> paths = (ArrayList) endpoint.visitPaths(new Endpoint.Input(swhPID)).result;
+    ArrayList<SwhPID> nodes = (ArrayList) endpoint.visitNodes(new Endpoint.Input(swhPID)).result;
 
     ArrayList<SwhPath> expectedPaths = new ArrayList<SwhPath>();
     expectedPaths.add(
@@ -216,8 +216,8 @@
     Graph graph = getGraph();
     SwhPID swhPID = new SwhPID("swh:1:dir:0000000000000000000000000000000000000012");
     Endpoint endpoint = new Endpoint(graph, "backward", "*");
-    ArrayList<SwhPath> paths = (ArrayList) endpoint.visitPaths(swhPID).result;
-    ArrayList<SwhPID> nodes = (ArrayList) endpoint.visitNodes(swhPID).result;
+    ArrayList<SwhPath> paths = (ArrayList) endpoint.visitPaths(new Endpoint.Input(swhPID)).result;
+    ArrayList<SwhPID> nodes = (ArrayList) endpoint.visitNodes(new Endpoint.Input(swhPID)).result;
 
     ArrayList<SwhPath> expectedPaths = new ArrayList<SwhPath>();
     expectedPaths.add(
@@ -237,8 +237,8 @@
     Graph graph = getGraph();
     SwhPID swhPID = new SwhPID("swh:1:cnt:0000000000000000000000000000000000000004");
     Endpoint endpoint = new Endpoint(graph, "backward", "*");
-    ArrayList<SwhPath> paths = (ArrayList) endpoint.visitPaths(swhPID).result;
-    ArrayList<SwhPID> nodes = (ArrayList) endpoint.visitNodes(swhPID).result;
+    ArrayList<SwhPath> paths = (ArrayList) endpoint.visitPaths(new Endpoint.Input(swhPID)).result;
+    ArrayList<SwhPID> nodes = (ArrayList) endpoint.visitNodes(new Endpoint.Input(swhPID)).result;
 
     ArrayList<SwhPath> expectedPaths = new ArrayList<SwhPath>();
     expectedPaths.add(
@@ -290,8 +290,8 @@
     Graph graph = getGraph();
     SwhPID swhPID = new SwhPID("swh:1:snp:0000000000000000000000000000000000000020");
     Endpoint endpoint = new Endpoint(graph, "forward", "snp:rev");
-    ArrayList<SwhPath> paths = (ArrayList) endpoint.visitPaths(swhPID).result;
-    ArrayList<SwhPID> nodes = (ArrayList) endpoint.visitNodes(swhPID).result;
+    ArrayList<SwhPath> paths = (ArrayList) endpoint.visitPaths(new Endpoint.Input(swhPID)).result;
+    ArrayList<SwhPID> nodes = (ArrayList) endpoint.visitNodes(new Endpoint.Input(swhPID)).result;
 
     ArrayList<SwhPath> expectedPaths = new ArrayList<SwhPath>();
     expectedPaths.add(
@@ -309,8 +309,8 @@
     Graph graph = getGraph();
     SwhPID swhPID = new SwhPID("swh:1:rel:0000000000000000000000000000000000000010");
     Endpoint endpoint = new Endpoint(graph, "forward", "rel:rev,rev:rev");
-    ArrayList<SwhPath> paths = (ArrayList) endpoint.visitPaths(swhPID).result;
-    ArrayList<SwhPID> nodes = (ArrayList) endpoint.visitNodes(swhPID).result;
+    ArrayList<SwhPath> paths = (ArrayList) endpoint.visitPaths(new Endpoint.Input(swhPID)).result;
+    ArrayList<SwhPID> nodes = (ArrayList) endpoint.visitNodes(new Endpoint.Input(swhPID)).result;
 
     ArrayList<SwhPath> expectedPaths = new ArrayList<SwhPath>();
     expectedPaths.add(
@@ -329,8 +329,8 @@
     Graph graph = getGraph();
     SwhPID swhPID = new SwhPID("swh:1:rev:0000000000000000000000000000000000000013");
     Endpoint endpoint = new Endpoint(graph, "forward", "rev:*,dir:*");
-    ArrayList<SwhPath> paths = (ArrayList) endpoint.visitPaths(swhPID).result;
-    ArrayList<SwhPID> nodes = (ArrayList) endpoint.visitNodes(swhPID).result;
+    ArrayList<SwhPath> paths = (ArrayList) endpoint.visitPaths(new Endpoint.Input(swhPID)).result;
+    ArrayList<SwhPID> nodes = (ArrayList) endpoint.visitNodes(new Endpoint.Input(swhPID)).result;
 
     ArrayList<SwhPath> expectedPaths = new ArrayList<SwhPath>();
     expectedPaths.add(
@@ -417,8 +417,8 @@
     Graph graph = getGraph();
     SwhPID swhPID = new SwhPID("swh:1:snp:0000000000000000000000000000000000000020");
     Endpoint endpoint = new Endpoint(graph, "forward", "snp:*,rev:*");
-    ArrayList<SwhPath> paths = (ArrayList) endpoint.visitPaths(swhPID).result;
-    ArrayList<SwhPID> nodes = (ArrayList) endpoint.visitNodes(swhPID).result;
+    ArrayList<SwhPath> paths = (ArrayList) endpoint.visitPaths(new Endpoint.Input(swhPID)).result;
+    ArrayList<SwhPID> nodes = (ArrayList) endpoint.visitNodes(new Endpoint.Input(swhPID)).result;
 
     ArrayList<SwhPath> expectedPaths = new ArrayList<SwhPath>();
     expectedPaths.add(
@@ -449,8 +449,8 @@
     Graph graph = getGraph();
     SwhPID swhPID = new SwhPID("swh:1:snp:0000000000000000000000000000000000000020");
     Endpoint endpoint = new Endpoint(graph, "forward", "");
-    ArrayList<SwhPath> paths = (ArrayList) endpoint.visitPaths(swhPID).result;
-    ArrayList<SwhPID> nodes = (ArrayList) endpoint.visitNodes(swhPID).result;
+    ArrayList<SwhPath> paths = (ArrayList) endpoint.visitPaths(new Endpoint.Input(swhPID)).result;
+    ArrayList<SwhPID> nodes = (ArrayList) endpoint.visitNodes(new Endpoint.Input(swhPID)).result;
 
     ArrayList<SwhPath> expectedPaths = new ArrayList<SwhPath>();
     expectedPaths.add(
@@ -467,8 +467,8 @@
     Graph graph = getGraph();
     SwhPID swhPID = new SwhPID("swh:1:rev:0000000000000000000000000000000000000003");
     Endpoint endpoint = new Endpoint(graph, "backward", "rev:rev,rev:rel");
-    ArrayList<SwhPath> paths = (ArrayList) endpoint.visitPaths(swhPID).result;
-    ArrayList<SwhPID> nodes = (ArrayList) endpoint.visitNodes(swhPID).result;
+    ArrayList<SwhPath> paths = (ArrayList) endpoint.visitPaths(new Endpoint.Input(swhPID)).result;
+    ArrayList<SwhPID> nodes = (ArrayList) endpoint.visitNodes(new Endpoint.Input(swhPID)).result;
 
     ArrayList<SwhPath> expectedPaths = new ArrayList<SwhPath>();
     expectedPaths.add(
@@ -495,7 +495,7 @@
     Graph graph = getGraph();
     SwhPID swhPID = new SwhPID("swh:1:ori:0000000000000000000000000000000000000021");
     Endpoint endpoint = new Endpoint(graph, "forward", "*");
-    ArrayList<SwhPID> nodes = (ArrayList) endpoint.visitNodes(swhPID).result;
+    ArrayList<SwhPID> nodes = (ArrayList) endpoint.visitNodes(new Endpoint.Input(swhPID)).result;
 
     ArrayList<SwhPID> expectedNodes = new ArrayList<SwhPID>();
     expectedNodes.add(new SwhPID("swh:1:ori:0000000000000000000000000000000000000021"));
@@ -519,7 +519,7 @@
     Graph graph = getGraph();
     SwhPID swhPID = new SwhPID("swh:1:rev:0000000000000000000000000000000000000003");
     Endpoint endpoint = new Endpoint(graph, "backward", "rev:*");
-    ArrayList<SwhPID> nodes = (ArrayList) endpoint.visitNodes(swhPID).result;
+    ArrayList<SwhPID> nodes = (ArrayList) endpoint.visitNodes(new Endpoint.Input(swhPID)).result;
 
     ArrayList<SwhPID> expectedNodes = new ArrayList<SwhPID>();
     expectedNodes.add(new SwhPID("swh:1:rev:0000000000000000000000000000000000000003"));
diff --git a/java/server/src/test/java/org/softwareheritage/graph/WalkTest.java b/java/server/src/test/java/org/softwareheritage/graph/WalkTest.java
--- a/java/server/src/test/java/org/softwareheritage/graph/WalkTest.java
+++ b/java/server/src/test/java/org/softwareheritage/graph/WalkTest.java
@@ -39,8 +39,8 @@
           "swh:1:cnt:0000000000000000000000000000000000000005"
       );
 
-    SwhPath dfsPath = (SwhPath) endpoint.walk(src, dstFmt, "dfs").result;
-    SwhPath bfsPath = (SwhPath) endpoint.walk(src, dstFmt, "bfs").result;
+    SwhPath dfsPath = (SwhPath) endpoint.walk(new Endpoint.Input(src, dstFmt, "dfs")).result;
+    SwhPath bfsPath = (SwhPath) endpoint.walk(new Endpoint.Input(src, dstFmt, "bfs")).result;
 
     List<SwhPath> possibleSolutions = Arrays.asList(solution1, solution2);
     Assert.assertTrue(possibleSolutions.contains(dfsPath));
@@ -59,8 +59,8 @@
           "swh:1:cnt:0000000000000000000000000000000000000007"
       );
 
-    SwhPath dfsPath = (SwhPath) endpoint.walk(src, dstFmt, "dfs").result;
-    SwhPath bfsPath = (SwhPath) endpoint.walk(src, dstFmt, "bfs").result;
+    SwhPath dfsPath = (SwhPath) endpoint.walk(new Endpoint.Input(src, dstFmt, "dfs")).result;
+    SwhPath bfsPath = (SwhPath) endpoint.walk(new Endpoint.Input(src, dstFmt, "bfs")).result;
 
     Assert.assertEquals(dfsPath, expectedPath);
     Assert.assertEquals(bfsPath, expectedPath);
@@ -81,8 +81,8 @@
           "swh:1:rev:0000000000000000000000000000000000000003"
       );
 
-    SwhPath dfsPath = (SwhPath) endpoint.walk(src, dstFmt, "dfs").result;
-    SwhPath bfsPath = (SwhPath) endpoint.walk(src, dstFmt, "bfs").result;
+    SwhPath dfsPath = (SwhPath) endpoint.walk(new Endpoint.Input(src, dstFmt, "dfs")).result;
+    SwhPath bfsPath = (SwhPath) endpoint.walk(new Endpoint.Input(src, dstFmt, "bfs")).result;
 
     Assert.assertEquals(dfsPath, expectedPath);
     Assert.assertEquals(bfsPath, expectedPath);
@@ -103,8 +103,8 @@
           "swh:1:rev:0000000000000000000000000000000000000018"
       );
 
-    SwhPath dfsPath = (SwhPath) endpoint.walk(src, dstFmt, "dfs").result;
-    SwhPath bfsPath = (SwhPath) endpoint.walk(src, dstFmt, "bfs").result;
+    SwhPath dfsPath = (SwhPath) endpoint.walk(new Endpoint.Input(src, dstFmt, "dfs")).result;
+    SwhPath bfsPath = (SwhPath) endpoint.walk(new Endpoint.Input(src, dstFmt, "bfs")).result;
 
     Assert.assertEquals(dfsPath, expectedPath);
     Assert.assertEquals(bfsPath, expectedPath);
@@ -150,8 +150,8 @@
           "swh:1:snp:0000000000000000000000000000000000000020"
       );
 
-    SwhPath dfsPath = (SwhPath) endpoint.walk(src, dstFmt, "dfs").result;
-    SwhPath bfsPath = (SwhPath) endpoint.walk(src, dstFmt, "bfs").result;
+    SwhPath dfsPath = (SwhPath) endpoint.walk(new Endpoint.Input(src, dstFmt, "dfs")).result;
+    SwhPath bfsPath = (SwhPath) endpoint.walk(new Endpoint.Input(src, dstFmt, "bfs")).result;
 
     List<SwhPath> possibleSolutions = Arrays.asList(solution1, solution2, solution3, solution4);
     Assert.assertTrue(possibleSolutions.contains(dfsPath));
@@ -199,8 +199,8 @@
           "swh:1:cnt:0000000000000000000000000000000000000001"
       );
 
-    SwhPath dfsPath = (SwhPath) endpoint.walk(src, dstFmt, "dfs").result;
-    SwhPath bfsPath = (SwhPath) endpoint.walk(src, dstFmt, "bfs").result;
+    SwhPath dfsPath = (SwhPath) endpoint.walk(new Endpoint.Input(src, dstFmt, "dfs")).result;
+    SwhPath bfsPath = (SwhPath) endpoint.walk(new Endpoint.Input(src, dstFmt, "bfs")).result;
 
     List<SwhPath> possibleSolutions =
       Arrays.asList(solution1, solution2, solution3, solution4, solution5);
@@ -223,8 +223,8 @@
           "swh:1:rel:0000000000000000000000000000000000000019"
       );
 
-    SwhPath dfsPath = (SwhPath) endpoint.walk(src, dstFmt, "dfs").result;
-    SwhPath bfsPath = (SwhPath) endpoint.walk(src, dstFmt, "bfs").result;
+    SwhPath dfsPath = (SwhPath) endpoint.walk(new Endpoint.Input(src, dstFmt, "dfs")).result;
+    SwhPath bfsPath = (SwhPath) endpoint.walk(new Endpoint.Input(src, dstFmt, "bfs")).result;
 
     Assert.assertEquals(dfsPath, expectedPath);
     Assert.assertEquals(bfsPath, expectedPath);