diff --git a/opensearch/src/root/bulk.rs b/opensearch/src/root/bulk.rs
index e9f430a9..12a28d59 100644
--- a/opensearch/src/root/bulk.rs
+++ b/opensearch/src/root/bulk.rs
@@ -172,7 +172,7 @@ where
     B: Serialize,
 {
     /// Creates a new instance of a [bulk create operation](BulkCreateOperation)
-    pub fn create<S>(id: S, source: B) -> BulkCreateOperation<B>
+    pub fn create<S>(id: Option<S>, source: B) -> BulkCreateOperation<B>
     where
         S: Into<String>,
     {
@@ -180,8 +180,11 @@ where
     }
 
     /// Creates a new instance of a [bulk index operation](BulkIndexOperation)
-    pub fn index(source: B) -> BulkIndexOperation<B> {
-        BulkIndexOperation::new(source)
+    pub fn index<S>(id: Option<S>, source: B) -> BulkIndexOperation<B>
+    where
+        S: Into<String>,
+    {
+        BulkIndexOperation::new(id, source)
     }
 
     /// Creates a new instance of a [bulk delete operation](BulkDeleteOperation)
@@ -227,7 +230,7 @@ pub struct BulkCreateOperation<B> {
 
 impl<B> BulkCreateOperation<B> {
     /// Creates a new instance of [BulkCreateOperation]
-    pub fn new<S>(id: S, source: B) -> Self
+    pub fn new<S>(id: Option<S>, source: B) -> Self
     where
         S: Into<String>,
     {
@@ -236,7 +239,10 @@ impl<B> BulkCreateOperation<B> {
                 header: BulkHeader {
                     action: BulkAction::Create,
                     metadata: BulkMetadata {
-                        _id: Some(id.into()),
+                        _id: match id {
+                            Some(_id) => Some(_id.into()),
+                            None => None,
+                        },
                         ..Default::default()
                     },
                 },
@@ -291,12 +297,19 @@ pub struct BulkIndexOperation<B> {
 
 impl<B> BulkIndexOperation<B> {
     /// Creates a new instance of [BulkIndexOperation]
-    pub fn new(source: B) -> Self {
+    pub fn new<S>(id: Option<S>, source: B) -> Self
+    where
+        S: Into<String>,
+    {
         Self {
             operation: BulkOperation {
                 header: BulkHeader {
                     action: BulkAction::Index,
                     metadata: BulkMetadata {
+                        _id: match id {
+                            Some(_id) => Some(_id.into()),
+                            None => None,
+                        },
                         ..Default::default()
                     },
                 },
@@ -696,8 +709,7 @@ mod tests {
         let mut ops: Vec<BulkOperation<Value>> = Vec::with_capacity(4);
 
         ops.push(
-            BulkOperation::index(json!({ "foo": "index" }))
-                .id("1")
+            BulkOperation::index(Some("1"), json!({ "foo": "index" }))
                 .pipeline("pipeline")
                 .routing("routing")
                 .if_seq_no(1)
@@ -707,7 +719,7 @@ mod tests {
                 .into(),
         );
         ops.push(
-            BulkOperation::create("2", json!({ "bar": "create" }))
+            BulkOperation::create(Some("2"), json!({ "bar": "create" }))
                 .pipeline("pipeline")
                 .routing("routing")
                 .index("create_index")
@@ -782,13 +794,19 @@ mod tests {
         let mut ops = BulkOperations::new();
 
         ops.push(
-            BulkOperation::index(IndexDoc { foo: "index" })
-                .id("1")
+            BulkOperation::index(Some("1"), IndexDoc { foo: "index" })
                 .pipeline("pipeline")
                 .index("index_doc")
                 .routing("routing"),
         )?;
-        ops.push(BulkOperation::create("2", CreateDoc { bar: "create" }))?;
+        ops.push(BulkOperation::create(
+            Some("2"),
+            CreateDoc { bar: "create" },
+        ))?;
+        ops.push(BulkOperation::create(
+            None::<String>,
+            CreateDoc { bar: "create" },
+        ))?;
         ops.push(BulkOperation::update("3", UpdateDoc { baz: "update" }))?;
         ops.push(BulkOperation::<()>::delete("4"))?;
 
@@ -800,6 +818,8 @@ mod tests {
         expected.put_slice(b"{\"foo\":\"index\"}\n");
         expected.put_slice(b"{\"create\":{\"_id\":\"2\"}}\n");
         expected.put_slice(b"{\"bar\":\"create\"}\n");
+        expected.put_slice(b"{\"create\":{}}\n");
+        expected.put_slice(b"{\"bar\":\"create\"}\n");
         expected.put_slice(b"{\"update\":{\"_id\":\"3\"}}\n");
         expected.put_slice(b"{\"baz\":\"update\"}\n");
         expected.put_slice(b"{\"delete\":{\"_id\":\"4\"}}\n");
diff --git a/opensearch/tests/common/client.rs b/opensearch/tests/common/client.rs
index c5935cf7..6e438182 100644
--- a/opensearch/tests/common/client.rs
+++ b/opensearch/tests/common/client.rs
@@ -151,9 +151,8 @@ pub async fn index_documents(client: &OpenSearch) -> Result<Response, Error> {
     if exists_response.status_code() == StatusCode::NOT_FOUND {
         let mut body: Vec<BulkOperation<_>> = vec![];
         for i in 1..=10 {
-            let op = BulkOperation::index(json!({"title":"OpenSearch"}))
-                .id(i.to_string())
-                .into();
+            let op =
+                BulkOperation::index(Some(i.to_string()), json!({"title":"OpenSearch"})).into();
             body.push(op);
         }