diff --git a/src/plugins/custom_integrations/server/language_clients/index.ts b/src/plugins/custom_integrations/server/language_clients/index.ts
index 0ce45dbcfcd87..d18eddaf08627 100644
--- a/src/plugins/custom_integrations/server/language_clients/index.ts
+++ b/src/plugins/custom_integrations/server/language_clients/index.ts
@@ -151,7 +151,11 @@ export function registerLanguageClients(
       description: integration.description,
       type: 'ui_link',
       shipper: 'language_clients',
-      uiInternalPath: integration.docUrlTemplate.replace('{branch}', branch),
+      // Documentation for `main` branches is still published at a `master` URL.
+      uiInternalPath: integration.docUrlTemplate.replace(
+        '{branch}',
+        branch === 'main' ? 'master' : branch
+      ),
       isBeta: false,
       icons,
       categories: ['elastic_stack', 'custom', 'language_client'],