diff --git a/_api-reference/index.md b/_api-reference/index.md
index c981534a..7d01fd94 100644
--- a/_api-reference/index.md
+++ b/_api-reference/index.md
@@ -13,32 +13,50 @@ redirect_from:
 
 You can use REST APIs for most operations in OpenSearch. In this reference, we provide a description of the API, and details that include the paths and HTTP methods, supported parameters, and example requests and responses.
 
-Most REST APIs supported by OpenSearch are included in this reference. If you know of any that are missing, feel free to enter feedback or submit a pull request. 
+This reference includes the REST APIs supported by OpenSearch. If a REST API is missing, please provide feedback or submit a pull request in GitHub.
 {: .tip }
 
 ## Related articles 
 
 - [Analyze API]({{site.url}}{{site.baseurl}}/api-reference/analyze-apis/index/)
+- [Access control API]({{site.url}}{{site.baseurl}}/security/access-control/api/)
+- [Alerting API]({{site.url}}{{site.baseurl}}/observing-your-data/alerting/api/)
+- [Anomaly detection API]({{site.url}}{{site.baseurl}}/observing-your-data/ad/api/) 
 - [CAT APIs]({{site.url}}{{site.baseurl}}/api-reference/cat/index/)
 - [Cluster APIs]({{site.url}}{{site.baseurl}}/api-reference/cluster-api/index/)
-- [Common parameters]({{site.url}}{{site.baseurl}}/api-reference/common-parameters/)
+- [Common REST parameters]({{site.url}}{{site.baseurl}}/api-reference/common-parameters/)
 - [Count]({{site.url}}{{site.baseurl}}/api-reference/count/)
-- [Document]({{site.url}}{{site.baseurl}}/api-reference/document-apis/index/)
+- [Cross-cluster replication API]({{site.url}}{{site.baseurl}}/tuning-your-cluster/replication-plugin/api/)
+- [Document APIs]({{site.url}}{{site.baseurl}}/api-reference/document-apis/index/)
 - [Explain]({{site.url}}{{site.baseurl}}/api-reference/explain/)
 - [Index APIs]({{site.url}}{{site.baseurl}}/api-reference/index-apis/index/)
+- [Index rollups API]({{site.url}}{{site.baseurl}}/im-plugin/index-rollups/rollup-api/)
+- [Index state management API]({{site.url}}{{site.baseurl}}/im-plugin/ism/api/)
+- [ISM error prevention API]({{site.url}}{{site.baseurl}}/im-plugin/ism/error-prevention/api/)
 - [Ingest APIs]({{site.url}}{{site.baseurl}}/api-reference/ingest-apis/index/)
+- [k-NN plugin API]({{site.url}}{{site.baseurl}}/search-plugins/knn/api/)
+- [ML Commons API]({{site.url}}{{site.baseurl}}/ml-commons-plugin/api/) 
 - [Multi-search]({{site.url}}{{site.baseurl}}/api-reference/multi-search/)
 - [Nodes APIs]({{site.url}}{{site.baseurl}}/api-reference/nodes-apis/index/)
+- [Notifications API]({{site.url}}{{site.baseurl}}/observing-your-data/notifications/api/)
+- [Performance analyzer API]({{site.url}}{{site.baseurl}}/monitoring-your-cluster/pa/api/)
+- [Point in Time API]({{site.url}}{{site.baseurl}}/search-plugins/point-in-time-api/)
 - [Popular APIs]({{site.url}}{{site.baseurl}}/api-reference/popular-api/)
 - [Ranking evaluation]({{site.url}}{{site.baseurl}}/api-reference/rank-eval/)
 - [Reload search analyzer]({{site.url}}{{site.baseurl}}/api-reference/reload-search-analyzer/)
 - [Remove cluster information]({{site.url}}{{site.baseurl}}/api-reference/remote-info/)
+- [Root cause analysis API]({{site.url}}{{site.baseurl}}/monitoring-your-cluster/pa/rca/api/)
+- [Snapshot management API]({{site.url}}{{site.baseurl}}/tuning-your-cluster/availability-and-recovery/snapshots/sm-api/)
 - [Script APIs]({{site.url}}{{site.baseurl}}/api-reference/script-apis/index/)
 - [Scroll]({{site.url}}{{site.baseurl}}/api-reference/scroll/)
 - [Search]({{site.url}}{{site.baseurl}}/api-reference/search/)
+- [Search relevance stats API]({{site.url}}{{site.baseurl}}/search-plugins/search-relevance/stats-api/)
+- [Security analytics APIs]({{site.url}}{{site.baseurl}}/security-analytics/api-tools/index/)
 - [Snapshot APIs]({{site.url}}{{site.baseurl}}/api-reference/snapshots/index/)
+- [Stats API]({{site.url}}{{site.baseurl}}/tuning-your-cluster/availability-and-recovery/stats-api/)
 - [Supported units]({{site.url}}{{site.baseurl}}/api-reference/units/)
 - [Tasks]({{site.url}}{{site.baseurl}}/api-reference/tasks/)
+- [Transforms API]({{site.url}}{{site.baseurl}}/im-plugin/index-transforms/transforms-apis/)