diff --git a/protocol-spec/json-schema/BaseMessage.schema.json b/protocol-spec/json-schema/BaseMessage.schema.json
new file mode 100644
index 0000000..03829ff
--- /dev/null
+++ b/protocol-spec/json-schema/BaseMessage.schema.json
@@ -0,0 +1,75 @@
+{
+    "definitions": {},
+    "$schema": "http://json-schema.org/draft-07/schema#",
+    "$id": "http://example.com/root.json",
+    "type": "object",
+    "title": "Base Message Schema",
+    "required": [
+      "id",
+      "type",
+      "from",
+      "to",
+      "payload"
+    ],
+    "additionalProperties": false,
+    "properties": {
+      "id": {
+        "$id": "#/properties/id",
+        "type": "string",
+        "title": "id",
+        "description": "Message identifier (used to track the request-response chain)",
+        "examples": [
+          "abcd"
+        ],
+        "pattern": "^(.*)$"
+      },
+      "type": {
+        "$id": "#/properties/type",
+        "type": "string",
+        "title": "type",
+        "description": "Type of message (used to determine which extension this message belongs to)",
+        "examples": [
+          "profile:register",
+          "profile:login",
+          "incorrectMessageType:error"
+        ],
+        "pattern": "^(.*)$"
+      },
+      "from": {
+        "$id": "#/properties/from",
+        "type": "string",
+        "title": "from",
+        "description": "From which entity this message is send. May be set to \"anonymous\" value, if action doesn't require authorization. This is EntityID",
+        "examples": [
+          "396277b7dcd0f1173f2007baa604de7593529cc3fbf335fb7924851cb25c1fdf",
+          "@juliet@396277b7dcd0f1173f2007baa604de7593529cc3fbf335fb7924851cb25c1fdf",
+          "#chpok@b9966d89028b120145dad38961bed0b3b2eac0a2915c0bb1665ffcc1586f6f59",
+          "anonymous"
+        ],
+        "pattern": "^(.*)$"
+      },
+      "to": {
+        "$id": "#/properties/to",
+        "type": "string",
+        "title": "to",
+        "description": "Message recipient. This is Entity ID.",
+        "examples": [
+          "@juliet@02a6f23250868e903ff62e99e664a5717e945ca8153bf0ebc4f505cbe3a0860c",
+          "#white_house_garden@8baef2426dc6a92e16d39d79d90ae6d5a0080aaeccc5f02f1e83a959bc4d0be7",
+          "%phone:1234567890@6dfea40d98f71b3191f94c31af887a00eaeef2fe3501226e3fbb302fc5269eec",
+          "@romeo@cadmium.im"
+        ],
+        "pattern": "^(.*)$"
+      },
+      "payload": {
+        "$id": "#/properties/payload",
+        "type": "object",
+        "title": "payload",
+        "description": "Message payload (used to store extra information in message, list of permissible fields in the payload depends on \"type\" field)",
+        "patternProperties": {
+          "^(.*)$": {}
+        }
+      }
+    }
+  }
+  
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