diff --git a/docker/deployed/staging/api/.env_validator.example b/docker/deployed/staging/api/.env_validator.example
index c38fc499..6c29ad27 100644
--- a/docker/deployed/staging/api/.env_validator.example
+++ b/docker/deployed/staging/api/.env_validator.example
@@ -1,3 +1,3 @@
 VALIDATOR_ALCHEMY_OPTIMISM_GOERLI_API_KEY=
-VALIDATOR_OPTIMISM_GOERLI_SIGNER_PRIVATE_KEY=
+VALIDATOR_ALCHEMY_OPTIMISM_SEPOLIA_API_KEY=
 METRICS_HUB_API_KEY=
\ No newline at end of file
diff --git a/docker/deployed/staging/api/config.json b/docker/deployed/staging/api/config.json
index d516576d..a91278c3 100644
--- a/docker/deployed/staging/api/config.json
+++ b/docker/deployed/staging/api/config.json
@@ -51,6 +51,25 @@
     "ChainStackCollectFrequency": "15m"
   },
   "Chains": [
+    {
+      "Name": "Optimism Sepolia",
+      "ChainID": 11155420,
+      "Registry": {
+        "EthEndpoint": "wss://eth-sepolia.g.alchemy.com/v2/${VALIDATOR_ALCHEMY_OPTIMISM_SEPOLIA_API_KEY}",
+        "ContractAddress": "0xd39a346e8299F4e3685f3D44215e0c9328e73439"
+      },
+      "EventFeed": {
+        "ChainAPIBackoff": "15s",
+        "NewBlockPollFreq": "10s",
+        "MinBlockDepth": 0,
+        "PersistEvents": false
+      },
+      "EventProcessor": {
+        "BlockFailedExecutionBackoff": "10s",
+        "DedupExecutedTxns": true
+      },
+      "HashCalculationStep": 100
+    },
     {
       "Name": "Optimism Goerli",
       "ChainID": 420,
diff --git a/docker/deployed/testnet/api/.env_validator.example b/docker/deployed/testnet/api/.env_validator.example
index 273dfb66..561a6ec2 100644
--- a/docker/deployed/testnet/api/.env_validator.example
+++ b/docker/deployed/testnet/api/.env_validator.example
@@ -3,4 +3,5 @@ VALIDATOR_GLIF_FILECOIN_CALIBRATION_API_KEY=
 VALIDATOR_ALCHEMY_POLYGON_MUMBAI_API_KEY=
 VALIDATOR_ALCHEMY_ARBITRUM_SEPOLIA_API_KEY=
 VALIDATOR_ALCHEMY_OPTIMISM_GOERLI_API_KEY=
+VALIDATOR_ALCHEMY_OPTIMISM_SEPOLIA_API_KEY=
 METRICS_HUB_API_KEY=
diff --git a/docker/deployed/testnet/api/config.json b/docker/deployed/testnet/api/config.json
index b18c8aa1..fb8792ea 100644
--- a/docker/deployed/testnet/api/config.json
+++ b/docker/deployed/testnet/api/config.json
@@ -128,6 +128,25 @@
             },
             "HashCalculationStep": 1800
         },
+        {
+            "Name": "Optimism Sepolia",
+            "ChainID": 11155420,
+            "Registry": {
+                "EthEndpoint": "wss://opt-sepolia.g.alchemy.com/v2/${VALIDATOR_ALCHEMY_OPTIMISM_SEPOLIA_API_KEY}",
+                "ContractAddress": "0x68A2f4423ad3bf5139Db563CF3bC80aA09ed7079"
+            },
+            "EventFeed": {
+                "ChainAPIBackoff": "15s",
+                "NewBlockPollFreq": "5s",
+                "MinBlockDepth": 0,
+                "PersistEvents": true
+            },
+            "EventProcessor": {
+                "BlockFailedExecutionBackoff": "10s",
+                "DedupExecutedTxns": true
+            },
+            "HashCalculationStep": 1800
+        },
         {
             "Name": "Filecoin Calibration",
             "ChainID": 314159,
diff --git a/pkg/client/chains.go b/pkg/client/chains.go
index 6b6cc982..48b32ba8 100644
--- a/pkg/client/chains.go
+++ b/pkg/client/chains.go
@@ -24,6 +24,7 @@ var ChainIDs = struct {
 	EthereumGoerli      ChainID
 	EthereumSepolia     ChainID
 	OptimismGoerli      ChainID
+	OptimismSepolia     ChainID
 	ArbitrumGoerli      ChainID
 	ArbitrumSepolia     ChainID
 	FilecoinCalibration ChainID
@@ -38,6 +39,7 @@ var ChainIDs = struct {
 	Filecoin:            314,
 	EthereumSepolia:     11155111,
 	OptimismGoerli:      420,
+	OptimismSepolia:     11155420,
 	ArbitrumSepolia:     421614,
 	FilecoinCalibration: 314159,
 	PolygonMumbai:       80001,
@@ -102,6 +104,12 @@ var Chains = map[ChainID]Chain{
 		Name:         "Optimism Goerli",
 		ContractAddr: common.HexToAddress("0xC72E8a7Be04f2469f8C2dB3F1BdF69A7D516aBbA"),
 	},
+	ChainIDs.OptimismSepolia: {
+		Endpoint:     testnetURL,
+		ID:           ChainIDs.OptimismSepolia,
+		Name:         "Optimism Sepolia",
+		ContractAddr: common.HexToAddress("0x68A2f4423ad3bf5139Db563CF3bC80aA09ed7079"),
+	},
 	ChainIDs.ArbitrumSepolia: {
 		Endpoint:     testnetURL,
 		ID:           ChainIDs.ArbitrumSepolia,
@@ -143,6 +151,7 @@ var AlchemyURLs = map[ChainID]string{
 	ChainIDs.EthereumSepolia: "https://eth-sepolia.g.alchemy.com/v2/%s",
 	ChainIDs.Ethereum:        "https://eth-mainnet.g.alchemy.com/v2/%s",
 	ChainIDs.OptimismGoerli:  "https://opt-goerli.g.alchemy.com/v2/%s",
+	ChainIDs.OptimismSepolia: "https://opt-sepolia.g.alchemy.com/v2/%s",
 	ChainIDs.Optimism:        "https://opt-mainnet.g.alchemy.com/v2/%s",
 	ChainIDs.ArbitrumSepolia: "https://arb-sepolia.g.alchemy.com/v2/%s",
 	ChainIDs.Arbitrum:        "https://arb-mainnet.g.alchemy.com/v2/%s",