diff --git a/run_udf.json b/run_udf.json
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+++ b/run_udf.json
@@ -0,0 +1,103 @@
+{
+    "id": "run_udf",
+    "summary": "Run a UDF",
+    "description": "Runs a UDF in one of the supported runtime environments.\n\nThe process can either:\n\n1. load and run a UDF stored in a file on the server-side workspace of the authenticated user. The path to the UDF file must be relative to the root directory of the user's workspace.\n2. fetch and run a remotely stored and published UDF by absolute URI.\n3. run the source code specified inline as string.\n\nThe loaded UDF can be executed in several processes such as ``aggregate_spatial()``, ``apply()``, ``apply_dimension()`` and ``reduce_dimension()``. The user must ensure that the data is given in a way that the UDF code can make sense of it.",
+    "categories": [
+        "cubes",
+        "import",
+        "udf"
+    ],
+    "parameters": [
+        {
+            "name": "data",
+            "description": "The data to be passed to the UDF.",
+            "schema": [
+                {
+                    "title": "Array",
+                    "type": "array",
+                    "minItems": 1,
+                    "items": {
+                        "description": "Any data type."
+                    }
+                },
+                {
+                    "title": "Single Value",
+                    "description": "A single value of any data type."
+                }
+            ]
+        },
+        {
+            "name": "udf",
+            "description": "Either source code, an absolute URL or a path to a UDF script.",
+            "schema": [
+                {
+                    "description": "Absolute URL to a UDF",
+                    "type": "string",
+                    "format": "uri",
+                    "subtype": "uri",
+                    "pattern": "^https?://"
+                },
+                {
+                    "description": "Path to a UDF uploaded to the server.",
+                    "type": "string",
+                    "subtype": "file-path",
+                    "pattern": "^[^\r\n\\:'\"]+$"
+                },
+                {
+                    "description": "The multi-line source code of a UDF, must contain a newline/line-break.",
+                    "type": "string",
+                    "subtype": "udf-code",
+                    "pattern": "(\r\n|\r|\n)"
+                }
+            ]
+        },
+        {
+            "name": "runtime",
+            "description": "A UDF runtime identifier available at the back-end.",
+            "schema": {
+                "type": "string",
+                "subtype": "udf-runtime"
+            }
+        },
+        {
+            "name": "version",
+            "description": "An UDF runtime version. If set to `null`, the default runtime version specified for each runtime is used.",
+            "schema": [
+                {
+                    "type": "string",
+                    "subtype": "udf-runtime-version"
+                },
+                {
+                    "title": "Default runtime version",
+                    "type": "null"
+                }
+            ],
+            "default": null,
+            "optional": true
+        },
+        {
+            "name": "context",
+            "description": "Additional data such as configuration options to be passed to the UDF.",
+            "schema": {
+                "description": "Any data type."
+            },
+            "default": {},
+            "optional": true
+        }
+    ],
+    "exceptions": {
+        "InvalidRuntime": {
+            "message": "The specified UDF runtime is not supported."
+        },
+        "InvalidVersion": {
+            "message": "The specified UDF runtime version is not supported."
+        }
+    },
+    "returns": {
+        "description": "The data processed by the UDF. The returned value can be of any data type and is exactly what the UDF code returns.",
+        "schema": {
+            "title": "Any",
+            "description": "Any data type."
+        }
+    }
+}
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