diff --git a/data/spot.py b/data/spot.py
index 50f3761..a2a6966 100644
--- a/data/spot.py
+++ b/data/spot.py
@@ -1,4 +1,5 @@
 import json
+import uuid
 from dataclasses import dataclass
 from datetime import datetime
 
@@ -15,6 +16,8 @@ from core.utils import infer_mode_family_from_mode, infer_band_from_freq, infer_
 # Data class that defines a spot.
 @dataclass
 class Spot:
+    # Globally unique identifier for the spot
+    guid: str = str(uuid.uuid4())
     # Callsign of the operator that has been spotted
     dx_call: str = None
     # Callsign of the operator that has spotted them
diff --git a/webassets/apidocs/openapi.yml b/webassets/apidocs/openapi.yml
index 1d56299..704e583 100644
--- a/webassets/apidocs/openapi.yml
+++ b/webassets/apidocs/openapi.yml
@@ -223,6 +223,10 @@ components:
     Spot:
       type: object
       properties:
+        guid:
+          type: string
+          description: Globally unique identifier to distinguish this spot from any others.
+          example: d8a3f1b6-cb73-464e-b717-54b7004aa04f
         dx_call:
           type: string
           description: Callsign of the operator that has been spotted