diff --git a/arb-connext-sepolia.yml b/arb-connext-sepolia.yml
new file mode 100644
index 00000000..4b2e484a
--- /dev/null
+++ b/arb-connext-sepolia.yml
@@ -0,0 +1,58 @@
+version: '3.1'
+
+services:
+  arb-connext-sepolia:
+    image: 'offchainlabs/nitro-node:v2.3.4-rc.5-b4cc111'
+    stop_grace_period: 3m
+    user: root
+    volumes:
+      - 'arb-connext-sepolia:/persistent'
+      - './arb/sepolia/connext/baseConfig.json:/baseConfig.json'      
+    expose:
+      - 8547 # http + ws
+    command:
+      - --conf.file=/baseConfig.json
+      - --persistent.ancient=/persistent/ancient
+      - --persistent.chain=/persistent/chain
+      - --persistent.global-config=/persistent/global-config
+      - --execution.caching.archive=true
+      - --execution.forwarding-target=https://rpc.connext-sepolia.gelato.digital
+      - --node.feed.input.url=wss://feed.connext-sepolia.gelato.digital
+      - --parent-chain.connection.url=${CONNEXT_SEPOLIA_PARENT_RPC}
+      - --http.addr=0.0.0.0
+      - --http.port=8547
+      - --http.vhosts=*
+      - --http.corsdomain=*
+      - --http.api=eth,net,web3,arb,txpool,debug
+      - --ws.port=8547
+      - --ws.addr=0.0.0.0
+      - --ws.origins=*
+      - --ws.api=eth,net,web3,arb,txpool,debug
+      - --node.data-availability.enable=true
+      - --node.data-availability.sequencer-inbox-address=0x7f5C1a58014E9DE69663CAc441bfa4C5d94b7E64
+      - --node.data-availability.parent-chain-node-url=${CONNEXT_SEPOLIA_PARENT_RPC}
+      - --parent-chain.blob-client.beacon-url=${CONNEXT_SEPOLIA_PARENT_BEACON_REST}
+      - --node.data-availability.rest-aggregator.enable=true
+      - --node.data-availability.rest-aggregator.urls=https://das.connext-sepolia.gelato.digital
+      - --metrics
+      - --metrics-server.addr=0.0.0.0
+      - --metrics-server.port=6070
+      - --log-type=json
+      - --node.sequencer=false
+      - --execution.sequencer.enable=false
+      - --node.staker.enable=false
+      - --node.batch-poster.enable=false
+    restart: unless-stopped                 
+    labels:                     
+      - "traefik.enable=true"
+      - "traefik.http.middlewares.connext-sepolia-stripprefix.stripprefix.prefixes=/connext-sepolia"                      
+      - "traefik.http.services.connext-sepolia.loadbalancer.server.port=8547"
+      - "traefik.http.routers.connext-sepolia.entrypoints=websecure"                                              
+      - "traefik.http.routers.connext-sepolia.tls.certresolver=myresolver"                                        
+      - "traefik.http.routers.connext-sepolia.rule=Host(`$DOMAIN`) && PathPrefix(`/connext-sepolia`)"                     
+      - "traefik.http.routers.connext-sepolia.middlewares=connext-sepolia-stripprefix, ipwhitelist"                           
+    networks:                                                                                         
+      - chains
+
+volumes:  
+    arb-connext-sepolia:
diff --git a/arb/sepolia/connext/baseConfig.json b/arb/sepolia/connext/baseConfig.json
new file mode 100644
index 00000000..2e6fbcf8
--- /dev/null
+++ b/arb/sepolia/connext/baseConfig.json
@@ -0,0 +1,6 @@
+{
+  "chain": {
+    "info-json": "[{\"chain-id\":6398,\"parent-chain-id\":11155111,\"parent-chain-is-arbitrum\":false,\"chain-name\":\"Connext Sepolia\",\"chain-config\":{\"homesteadBlock\":0,\"daoForkBlock\":null,\"daoForkSupport\":true,\"eip150Block\":0,\"eip150Hash\":\"0x0000000000000000000000000000000000000000000000000000000000000000\",\"eip155Block\":0,\"eip158Block\":0,\"byzantiumBlock\":0,\"constantinopleBlock\":0,\"petersburgBlock\":0,\"istanbulBlock\":0,\"muirGlacierBlock\":0,\"berlinBlock\":0,\"londonBlock\":0,\"clique\":{\"period\":0,\"epoch\":0},\"arbitrum\":{\"EnableArbOS\":true,\"AllowDebugPrecompiles\":false,\"DataAvailabilityCommittee\":true,\"InitialArbOSVersion\":20,\"GenesisBlockNum\":0,\"MaxCodeSize\":24576,\"MaxInitCodeSize\":49152,\"InitialChainOwner\":\"0x8ECD393576Ca37a7e5095f31bdfE21F606FF5F75\"},\"chainId\":6398},\"rollup\":{\"bridge\":\"0xf0b58FA876005898798a66A04EE09159C199CB7A\",\"inbox\":\"0x7bc7DAF843bf57c54D41D912F8221A2eE830c320\",\"sequencer-inbox\":\"0x7f5C1a58014E9DE69663CAc441bfa4C5d94b7E64\",\"rollup\":\"0xE6D7bf11A6264BACa59e8fAD7f6985FaC8f62e60\",\"validator-utils\":\"0xb33Dca7b17c72CFC311D68C543cd4178E0d7ce55\",\"validator-wallet-creator\":\"0x75500812ADC9E51b721BEa31Df322EEc66967DDF\",\"deployed-at\":5780509}}]",
+    "name": "Connext Sepolia"
+  }
+}
diff --git a/reference-rpc-endpoint.json b/reference-rpc-endpoint.json
index 199d73f4..b94b33eb 100644
--- a/reference-rpc-endpoint.json
+++ b/reference-rpc-endpoint.json
@@ -33,7 +33,7 @@
     ]
   },
   "alephzero-sepolia": {
-    "id": 6398,
+    "id": 2039,
     "urls": [
       "https://rpc.alephzero-testnet.gelato.digital"
     ],
@@ -41,6 +41,15 @@
       "arb-alephzero-sepolia"
     ]
   },
+  "connext-sepolia": {
+    "id": 6398,
+    "urls": [
+      "https://rpc.connext-sepolia.gelato.digital"
+    ],
+    "default": [
+      "arb-connext-sepolia"
+    ]
+  },    
   "real": {
     "id": 111188,
     "urls": [