diff --git a/check_id_unicity.py b/check_id_unicity.py
new file mode 100644
index 00000000..ec1cba26
--- /dev/null
+++ b/check_id_unicity.py
@@ -0,0 +1,56 @@
+import sys
+import json
+import requests
+
+
+def get_json(url, verify=True, token=None):
+
+    try:
+        # Retrieve and load manifest
+        if ".github" in url:
+            r = requests.get(url, verify=verify, auth=token)
+        else:
+            r = requests.get(url, verify=verify)
+        r.raise_for_status()
+        return r.json()
+    except requests.exceptions.RequestException as e:
+        print("-> Error: unable to request %s, %s" % (url, e))
+        return None
+    except ValueError as e:
+        print("-> Error: unable to decode json from %s : %s" % (url, e))
+        return None
+
+
+def main(apps):
+    for app_id, app_data in apps.items():
+        url = app_data["url"]
+        github_repo_name = url.split("/")[-1].replace("_ynh", "")
+
+        if app_id != github_repo_name:
+            print "[%s] github repo name is not coherent with app id: '%s' vs '%s' (%s)" % (app_id, app_id, url.split("/")[-1], url)
+
+        owner, repo_name = url.split("/")[-2:]
+
+        raw_url = "https://raw.githubusercontent.com/%s/%s/%s/manifest.json" % (
+            owner, repo_name, app_data["revision"]
+        )
+
+        manifest = get_json(raw_url)
+
+        if manifest is None:
+            continue
+
+        manifest_id = manifest["id"]
+        if app_id != manifest_id:
+            print "[%s] manifest id is different from app id: '%s' vs '%s' (manifest_id" % (app_id, app_id, manifest_id)
+
+        if manifest_id != github_repo_name:
+            print "[%s] manifest id is different from github repo name : '%s' vs '%s' (%s)" % (app_id, manifest_id, url.split("/")[-1], url)
+
+
+if __name__ == '__main__':
+    if not sys.argv[1:]:
+        print "Usage: python check_id_unicity.py list.json"
+        sys.exit(1)
+
+    main(json.load(open(sys.argv[1])))