diff --git a/output/schema/schema.json b/output/schema/schema.json
index 5ddc312dda..45f989b1f9 100644
--- a/output/schema/schema.json
+++ b/output/schema/schema.json
@@ -9825,6 +9825,34 @@
         }
       ]
     },
+    {
+      "availability": {
+        "stack": {
+          "stability": "stable",
+          "visibility": "public"
+        }
+      },
+      "description": "Configure a custom inference endpoint",
+      "docUrl": "https://www.elastic.co/docs/api/doc/elasticsearch/operation/operation-inference-put-custom",
+      "name": "inference.put_custom",
+      "request": null,
+      "requestBodyRequired": false,
+      "requestMediaType": [
+        "application/json"
+      ],
+      "response": null,
+      "responseMediaType": [
+        "application/json"
+      ],
+      "urls": [
+        {
+          "methods": [
+            "PUT"
+          ],
+          "path": "/_inference/{task_type}/{custom_inference_id}"
+        }
+      ]
+    },
     {
       "availability": {
         "serverless": {
diff --git a/specification/_json_spec/inference.put_custom.json b/specification/_json_spec/inference.put_custom.json
new file mode 100644
index 0000000000..c12108683d
--- /dev/null
+++ b/specification/_json_spec/inference.put_custom.json
@@ -0,0 +1,35 @@
+{
+  "inference.put_custom": {
+    "documentation": {
+      "url": "https://www.elastic.co/docs/api/doc/elasticsearch/operation/operation-inference-put-custom",
+      "description": "Configure a custom inference endpoint"
+    },
+    "stability": "stable",
+    "visibility": "public",
+    "headers": {
+      "accept": ["application/json"],
+      "content_type": ["application/json"]
+    },
+    "url": {
+      "paths": [
+        {
+          "path": "/_inference/{task_type}/{custom_inference_id}",
+          "methods": ["PUT"],
+          "parts": {
+            "task_type": {
+              "type": "string",
+              "description": "The task type"
+            },
+            "custom_inference_id": {
+              "type": "string",
+              "description": "The inference Id"
+            }
+          }
+        }
+      ]
+    },
+    "body": {
+      "description": "The inference endpoint's task and service settings"
+    }
+  }
+}