diff --git a/Common/build.gradle.kts b/Common/build.gradle.kts
index 8eff9f8..4f348fc 100644
--- a/Common/build.gradle.kts
+++ b/Common/build.gradle.kts
@@ -44,6 +44,9 @@ dependencies {
     modCompileOnly("mezz.jei:jei-$minecraftVersion-common:$jeiVersion") // required for common jei plugin and mixin
     modCompileOnly("dev.latvian.mods:kubejs-fabric:$kubejsVersion") // required for common kubejs plugin | common has remapping issues
 
+    compileOnly("com.google.auto.service:auto-service:1.0.1")
+    annotationProcessor("com.google.auto.service:auto-service:1.0.1")
+
     // JUnit Tests
     testImplementation("org.junit.jupiter:junit-jupiter-api:$junitVersion")
     testRuntimeOnly("org.junit.jupiter:junit-jupiter-engine:$junitVersion")
diff --git a/Common/src/main/java/com/almostreliable/unified/AlmostUnified.java b/Common/src/main/java/com/almostreliable/unified/AlmostUnified.java
index acca11d..36387bc 100644
--- a/Common/src/main/java/com/almostreliable/unified/AlmostUnified.java
+++ b/Common/src/main/java/com/almostreliable/unified/AlmostUnified.java
@@ -23,6 +23,10 @@ public final class AlmostUnified {
         return STARTUP_CONFIG;
     }
 
+    public static boolean isRuntimeLoaded() {
+        return RUNTIME != null;
+    }
+
     public static AlmostUnifiedRuntime getRuntime() {
         if (RUNTIME == null) {
             throw new IllegalStateException("AlmostUnifiedRuntime not initialized");
diff --git a/Common/src/main/java/com/almostreliable/unified/AlmostUnifiedLookupImpl.java b/Common/src/main/java/com/almostreliable/unified/AlmostUnifiedLookupImpl.java
new file mode 100644
index 0000000..9f788e9
--- /dev/null
+++ b/Common/src/main/java/com/almostreliable/unified/AlmostUnifiedLookupImpl.java
@@ -0,0 +1,76 @@
+package com.almostreliable.unified;
+
+import com.almostreliable.unified.api.AlmostUnifiedLookup;
+import com.almostreliable.unified.utils.UnifyTag;
+import com.google.auto.service.AutoService;
+import net.minecraft.core.Registry;
+import net.minecraft.resources.ResourceLocation;
+import net.minecraft.tags.TagKey;
+import net.minecraft.world.item.Item;
+import net.minecraft.world.level.ItemLike;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.Set;
+import java.util.stream.Collectors;
+
+@AutoService(AlmostUnifiedLookup.class)
+public class AlmostUnifiedLookupImpl implements AlmostUnifiedLookup {
+
+    @Override
+    public boolean isLoaded() {
+        return AlmostUnified.isRuntimeLoaded();
+    }
+
+    @Nullable
+    @Override
+    public Item getReplacementForItem(ItemLike itemLike) {
+        ResourceLocation id = Registry.ITEM.getKey(itemLike.asItem());
+        ResourceLocation result = AlmostUnified.getRuntime().getReplacementMap().getReplacementForItem(id);
+        return Registry.ITEM.getOptional(result).orElse(null);
+    }
+
+    @Nullable
+    @Override
+    public Item getPreferredItemForTag(TagKey<Item> tag) {
+        UnifyTag<Item> asUnifyTag = UnifyTag.item(tag.location());
+        ResourceLocation result = AlmostUnified
+                .getRuntime()
+                .getReplacementMap()
+                .getPreferredItemForTag(asUnifyTag, $ -> true);
+        return Registry.ITEM.getOptional(result).orElse(null);
+    }
+
+    @Nullable
+    @Override
+    public TagKey<Item> getPreferredTagForItem(ItemLike itemLike) {
+        ResourceLocation id = Registry.ITEM.getKey(itemLike.asItem());
+        UnifyTag<Item> unifyTag = AlmostUnified.getRuntime().getReplacementMap().getPreferredTagForItem(id);
+        if (unifyTag == null) {
+            return null;
+        }
+        return TagKey.create(Registry.ITEM_REGISTRY, unifyTag.location());
+    }
+
+    @Override
+    public Set<Item> getPotentialItems(TagKey<Item> tag) {
+        UnifyTag<Item> asUnifyTag = UnifyTag.item(tag.location());
+        return AlmostUnified
+                .getRuntime()
+                .getFilteredTagMap()
+                .getItems(asUnifyTag)
+                .stream()
+                .flatMap(rl -> Registry.ITEM.getOptional(rl).stream())
+                .collect(Collectors.toSet());
+    }
+
+    @Override
+    public Set<TagKey<Item>> getConfiguredTags() {
+        return AlmostUnified
+                .getRuntime()
+                .getFilteredTagMap()
+                .getTags()
+                .stream()
+                .map(ut -> TagKey.create(Registry.ITEM_REGISTRY, ut.location()))
+                .collect(Collectors.toSet());
+    }
+}
diff --git a/Common/src/main/java/com/almostreliable/unified/api/AlmostUnifiedLookup.java b/Common/src/main/java/com/almostreliable/unified/api/AlmostUnifiedLookup.java
new file mode 100644
index 0000000..971be7c
--- /dev/null
+++ b/Common/src/main/java/com/almostreliable/unified/api/AlmostUnifiedLookup.java
@@ -0,0 +1,97 @@
+package com.almostreliable.unified.api;
+
+import net.minecraft.tags.TagKey;
+import net.minecraft.world.item.Item;
+import net.minecraft.world.level.ItemLike;
+
+import javax.annotation.Nullable;
+import java.util.ServiceLoader;
+import java.util.Set;
+
+public interface AlmostUnifiedLookup {
+
+    AlmostUnifiedLookup INSTANCE = ServiceLoader.load(AlmostUnifiedLookup.class).findFirst().orElseGet(Empty::new);
+
+    boolean isLoaded();
+
+    /**
+     * Returns replacement item for given {@link ItemLike}. If no configured tag exists which includes the item it will return null. <p>
+     * If the item is part of some stone strata, it will only check items within the same stone strata. <br>
+     * => e.g. "modid:deepslate_foo_ore" would not return "prio_modid:foo_ore".
+     *
+     * @param itemLike The item like to find the replacement for
+     * @return replacement item or null if there is no replacement
+     */
+    @Nullable
+    Item getReplacementForItem(ItemLike itemLike);
+
+    /**
+     * Returns the preferred item for given {@link TagKey}. If no configured tag exists which includes the item it will return null. <p>
+     * The preferred item is mainly chose by mod priorities, but it's possible to provide a fixed override through the config.
+     *
+     * @param tag The tag to find the preferred item for
+     * @return preferred item or null if there is no preferred item
+     */
+    @Nullable
+    Item getPreferredItemForTag(TagKey<Item> tag);
+
+    /**
+     * Returns the preferred tag for given {@link ItemLike}. If no configured tag exists which includes the item it will return null. <p>
+     *
+     * @param itemLike The item like to find the preferred tag for
+     * @return preferred tag or null if there is no preferred tag
+     */
+    @Nullable
+    TagKey<Item> getPreferredTagForItem(ItemLike itemLike);
+
+    /**
+     * Returns all potential items which are part of the given tag. Tags are only considered if they are part of the config, otherwise they will always return an empty set.
+     *
+     * @param tag The tag to find the potential items for
+     * @return potential items or empty set if there are no potential items
+     */
+    Set<Item> getPotentialItems(TagKey<Item> tag);
+
+    /**
+     * Returns all configured tags.
+     *
+     * @return configured tags
+     */
+    Set<TagKey<Item>> getConfiguredTags();
+
+    class Empty implements AlmostUnifiedLookup {
+
+        @Override
+        public boolean isLoaded() {
+            return false;
+        }
+
+        @Nullable
+        @Override
+        public Item getReplacementForItem(ItemLike itemLike) {
+            return null;
+        }
+
+        @Nullable
+        @Override
+        public Item getPreferredItemForTag(TagKey<Item> tag) {
+            return null;
+        }
+
+        @Nullable
+        @Override
+        public TagKey<Item> getPreferredTagForItem(ItemLike itemLike) {
+            return null;
+        }
+
+        @Override
+        public Set<Item> getPotentialItems(TagKey<Item> tag) {
+            return Set.of();
+        }
+
+        @Override
+        public Set<TagKey<Item>> getConfiguredTags() {
+            return Set.of();
+        }
+    }
+}
diff --git a/Fabric/build.gradle.kts b/Fabric/build.gradle.kts
index a83001b..24d009f 100644
--- a/Fabric/build.gradle.kts
+++ b/Fabric/build.gradle.kts
@@ -90,6 +90,9 @@ dependencies {
         println("Extra mod $mod with version $version detected")
         modLocalRuntime("$extraModsDirectory:$mod:$version")
     }
+
+    compileOnly("com.google.auto.service:auto-service:1.0.1")
+    annotationProcessor("com.google.auto.service:auto-service:1.0.1")
 }
 
 tasks {
diff --git a/Forge/build.gradle.kts b/Forge/build.gradle.kts
index 73c4024..a973fe3 100644
--- a/Forge/build.gradle.kts
+++ b/Forge/build.gradle.kts
@@ -97,6 +97,9 @@ dependencies {
             modLocalRuntime("$extraModsDirectory:$mod:$version")
         }
 
+    compileOnly("com.google.auto.service:auto-service:1.0.1")
+    annotationProcessor("com.google.auto.service:auto-service:1.0.1")
+
     // JUnit Tests
     testImplementation(project(":Common"))
     testImplementation(commonTests)