diff --git a/api/src/main/java/com/viaversion/viaversion/api/ViaAPI.java b/api/src/main/java/com/viaversion/viaversion/api/ViaAPI.java
index 52aa3358a..2f6bd45e7 100644
--- a/api/src/main/java/com/viaversion/viaversion/api/ViaAPI.java
+++ b/api/src/main/java/com/viaversion/viaversion/api/ViaAPI.java
@@ -52,7 +52,7 @@ public interface ViaAPI<T> {
      * @return API version incremented with meaningful API changes
      */
     default int apiVersion() {
-        return 2;
+        return 3;
     }
 
     /**
diff --git a/api/src/main/java/com/viaversion/viaversion/api/minecraft/item/Item.java b/api/src/main/java/com/viaversion/viaversion/api/minecraft/item/Item.java
index bb92fcf3c..a3e30390d 100644
--- a/api/src/main/java/com/viaversion/viaversion/api/minecraft/item/Item.java
+++ b/api/src/main/java/com/viaversion/viaversion/api/minecraft/item/Item.java
@@ -27,23 +27,64 @@ import org.checkerframework.checker.nullness.qual.Nullable;
 
 public interface Item {
 
+    /**
+     * Returns the item identifier.
+     *
+     * @return item identifier
+     */
     int identifier();
 
+    /**
+     * Sets the item identifier.
+     *
+     * @param identifier item identifier
+     */
     void setIdentifier(int identifier);
 
+    /**
+     * Returns the item amount.
+     *
+     * @return item amount
+     */
     int amount();
 
+    /**
+     * Returns the item amount.
+     *
+     * @param amount item amount
+     */
     void setAmount(int amount);
 
+    /**
+     * Returns the item data. Always 0 for 1.13+ items.
+     *
+     * @return item data
+     */
     default short data() {
         return 0;
     }
 
+    /**
+     * Sets the item data used in versions before 1.13.
+     *
+     * @param data item data
+     * @throws UnsupportedOperationException if the item implementation does not store data
+     */
     default void setData(short data) {
         throw new UnsupportedOperationException();
     }
 
+    /**
+     * Returns the item compound tag if present.
+     *
+     * @return item tag
+     */
     @Nullable CompoundTag tag();
 
+    /**
+     * Sets the item compound tag.
+     *
+     * @param tag item tag
+     */
     void setTag(@Nullable CompoundTag tag);
 }
diff --git a/api/src/main/java/com/viaversion/viaversion/api/protocol/version/ProtocolVersion.java b/api/src/main/java/com/viaversion/viaversion/api/protocol/version/ProtocolVersion.java
index 8f68c2d06..0c1a0e9fc 100644
--- a/api/src/main/java/com/viaversion/viaversion/api/protocol/version/ProtocolVersion.java
+++ b/api/src/main/java/com/viaversion/viaversion/api/protocol/version/ProtocolVersion.java
@@ -76,7 +76,7 @@ public class ProtocolVersion {
     public static final ProtocolVersion v1_16_2 = register(751, "1.16.2");
     public static final ProtocolVersion v1_16_3 = register(753, "1.16.3");
     public static final ProtocolVersion v1_16_4 = register(754, "1.16.4/5", new VersionRange("1.16", 4, 5));
-    public static final ProtocolVersion v1_17 = register(755, 33, "1.17");
+    public static final ProtocolVersion v1_17 = register(755, 34, "1.17");
     public static final ProtocolVersion unknown = register(-1, "UNKNOWN");
 
     public static ProtocolVersion register(int version, String name) {
diff --git a/gradle.properties b/gradle.properties
index 754db90ad..2795b4b2a 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,5 +1,5 @@
 # Project properties - we put these here so they can be modified without causing a recompile of the build scripts
-projectVersion=4.0.0-1.17-pre5-SNAPSHOT
+projectVersion=4.0.0-1.17-rc1-SNAPSHOT
 
 # Gradle properties
 org.gradle.daemon=true