diff --git a/op/bob/mainnet/rollup.json b/op/bob/mainnet/rollup.json
new file mode 100644
index 00000000..b70e7954
--- /dev/null
+++ b/op/bob/mainnet/rollup.json
@@ -0,0 +1,43 @@
+{
+  "genesis": {
+    "l1": {
+      "hash": "0x218132178d65c4bc490aadd93c31535326043fe1fe8fea2d87f26c1da83d45c2",
+      "number": 19634321
+    },
+    "l2": {
+      "hash": "0x8ed4903b7f9c3f7bb7a09374d63ae9c9852cd9aab1784b433c41dbeb47b4dba2",
+      "number": 0
+    },
+    "l2_time": 1712861987,
+    "system_config": {
+      "batcherAddr": "0x08f9f14ff43e112b18c96f0986f28cb1878f1d11",
+      "overhead": "0x00000000000000000000000000000000000000000000000000000000000000bc",
+      "scalar": "0x00000000000000000000000000000000000000000000000000000000000a6fe0",
+      "gasLimit": 30000000
+    }
+  },
+  "block_time": 2,
+  "max_sequencer_drift": 600,
+  "seq_window_size": 3600,
+  "channel_timeout": 300,
+  "l1_chain_id": 1,
+  "l2_chain_id": 60808,
+  "regolith_time": 0,
+  "canyon_time": 0,
+  "delta_time": 0,
+  "ecotone_time": 0,
+  "batch_inbox_address": "0x3a75346f81302aac0333fb5dcdd407e12a6cfa83",
+  "deposit_contract_address": "0x8adee124447435fe03e3cd24df3f4cae32e65a3e",
+  "l1_system_config_address": "0xacb886b75d76d1c8d9248cfddfa09b70c71c5393",
+  "protocol_versions_address": "0x0000000000000000000000000000000000000000",
+  "da_challenge_address": "0x0000000000000000000000000000000000000000",
+  "da_challenge_window": 0,
+  "da_resolve_window": 0,
+  "use_plasma": false,
+  "fjord_time": 1720627201,
+  "granite_time": 1726070401,
+  "holocene_time": 1736445601,
+  "isthmus_time": 1746806401,
+  "jovian_time": 1773325801,
+  "karst_time": 1790179201
+}