diff --git a/MC/bin/o2_hybrid_gen.py b/MC/bin/o2_hybrid_gen.py
new file mode 100755
index 000000000..12b5b7c73
--- /dev/null
+++ b/MC/bin/o2_hybrid_gen.py
@@ -0,0 +1,118 @@
+#!/usr/bin/env python3
+
+# This script creates a template JSON file for the configuration of the hybrid generator
+# The generators to be used are passed as a list of strings via the --gen flag, while the
+# output filename is set using --output. All the generators available in O2sim are supported.
+# Example:
+# $O2DPG_ROOT/MC/bin/o2_hybrid_gen.py --gen pythia8 boxgen external extkinO2 hepmc pythia8hf \
+#                                     --output config.json
+
+import argparse
+import json
+
+def main():
+    parser = argparse.ArgumentParser(description='Create a JSON file from command line flags.')
+    parser.add_argument('--gen', type=str, nargs='+', required=True, help='List of generators to be used')
+    parser.add_argument('--output', type=str, required=True, help='Output JSON file path')
+
+    args = parser.parse_args()
+
+    # put in a list all the elementes in the gen flag
+    noConfGen = ["pythia8pp", "pythia8hf", "pythia8hi", "pythia8powheg"]
+    gens = []
+    for gen in args.gen:
+        if gen == "pythia8":
+            gens.append({
+                'name': 'pythia8',
+                'config': {
+                    "config": "$O2_ROOT/share/Generators/egconfig/pythia8_inel.cfg",
+                    "hooksFileName": "",
+                    "hooksFuncName": "",
+                    "includePartonEvent": False,
+                    "particleFilter": "",
+                    "verbose": 0
+                }
+            })
+        elif gen == "external":
+            gens.append({
+                'name': 'external',
+                'config': {
+                    "fileName": "${O2DPG_ROOT}/MC/config/PWGDQ/external/generator/GeneratorParamPromptJpsiToElectronEvtGen_pp13TeV.C",
+                    "funcName": "GeneratorParamPromptJpsiToElectronEvtGen_pp13TeV()"
+                }
+            })
+        elif gen == "extkinO2": 
+            gens.append({
+                'name': 'extkinO2',
+                'config': {
+                    "skipNonTrackable": True,
+                    "continueMode": False,
+                    "roundRobin": False, 
+                    "randomize": False, 
+                    "rngseed": 0, 
+                    "randomphi": False, 
+                    "fileName": "/path/to/filename.root"
+                }
+            })
+        elif gen == "hepmc": 
+            gens.append({
+                "name": "hepmc",
+                "config": {
+                    "configcmd": {
+                    "fileNames": "",
+                    "cmd": ""
+                    },
+                    "confighepmc": {
+                    "version": 2,
+                    "eventsToSkip": 0,
+                    "fileName": "/path/to/filename.hepmc",
+                    "prune": False
+                    }
+                }
+            })
+        elif gen == "boxgen": 
+            gens.append({
+                "name": "boxgen",
+                "config": {
+                    "pdg": 13,
+                    "number": 1,
+                    "eta": [
+                    -4,
+                    -2.5
+                    ],
+                    "prange": [
+                    0.1,
+                    5
+                    ], 
+                    "phirange": [
+                    0,
+                    360
+                    ]
+                }
+            })
+        elif gen in noConfGen:
+            gens.append({
+                "name": gen,
+                "config": ""
+            })
+        else:
+            print(f"Generator {gen} not found in the list of available generators")
+            exit(1)
+
+    # fill fractions with 1 for each generator
+    fractions = [1] * len(gens)
+    
+    # Put gens and fractions in the data dictionary
+    data = {
+        "generators": gens,
+        "fractions": fractions
+    }
+    
+    # Write the data dictionary to a JSON file
+    with open(args.output, 'w') as f:
+        json.dump(data, f, indent=2)
+
+    print(f"JSON file created at {args.output}")
+
+if __name__ == "__main__":
+    main()