diff --git a/local-test/README.md b/local-test/README.md
index e5e801a..e07d35a 100644
--- a/local-test/README.md
+++ b/local-test/README.md
@@ -67,7 +67,8 @@ All defaults can be overridden via environment variables. Common ones:
 | `MORPHNODE_BIN` | `../morph/node/build/bin/morphnode` | Path to morphnode binary |
 | `RETH_HTTP_PORT` | `8545` | HTTP RPC port |
 | `RETH_AUTHRPC_PORT` | `8551` | Engine API auth RPC port |
-| `MORPH_NODE_L1_RPC` | *(per-network default)* | L1 Ethereum RPC endpoint |
+| `MORPH_NODE_L1_RPC` | *(per-network default)* | L1 Ethereum execution RPC endpoint |
+| `MORPH_NODE_L1_BEACON_RPC` | *(per-network default)* | L1 Ethereum beacon (blob) RPC endpoint — required for L1 derivation |
 
 Example with overrides:
 
diff --git a/local-test/common.sh b/local-test/common.sh
index 75e6e8b..90fea06 100755
--- a/local-test/common.sh
+++ b/local-test/common.sh
@@ -25,6 +25,9 @@ export MORPH_NETWORK
 
 if [[ "${MORPH_NETWORK}" == "mainnet" ]]; then
   : "${MORPH_NODE_L1_RPC:=${MORPH_NODE_L1_ETH_RPC:-https://ethereum.publicnode.com}}"
+  # L1 Beacon (CL) endpoint — a fullnode (no sequencer signer) derives L2 blocks
+  # from batches posted to L1 as EIP-4844 blobs, so the beacon blob API is required.
+  : "${MORPH_NODE_L1_BEACON_RPC:=${MORPH_NODE_L1_ETH_BEACON_RPC:-https://ethereum-beacon-api.publicnode.com}}"
   : "${MORPH_NODE_DEPOSIT_CONTRACT:=${MORPH_NODE_SYNC_DEPOSIT_CONTRACT_ADDRESS:-0x3931ade842f5bb8763164bdd81e5361dce6cc1ef}}"
   : "${MORPH_NODE_ROLLUP_CONTRACT:=}"
   : "${MORPH_NODE_EXTRA_FLAGS:=--mainnet}"
@@ -33,9 +36,11 @@ if [[ "${MORPH_NETWORK}" == "mainnet" ]]; then
   : "${MORPH_CHAIN:=mainnet}"
 else
   : "${MORPH_NODE_L1_RPC:=${MORPH_NODE_L1_ETH_RPC:-https://ethereum-hoodi-rpc.publicnode.com}}"
+  # L1 Beacon (CL) endpoint — see mainnet branch above for why this is required.
+  : "${MORPH_NODE_L1_BEACON_RPC:=${MORPH_NODE_L1_ETH_BEACON_RPC:-https://ethereum-hoodi-beacon-api.publicnode.com}}"
   : "${MORPH_NODE_DEPOSIT_CONTRACT:=${MORPH_NODE_SYNC_DEPOSIT_CONTRACT_ADDRESS:-0xd7f39d837f4790b215ba67e0ab63665912648dbe}}"
   : "${MORPH_NODE_ROLLUP_CONTRACT:=0x57e0e6dde89dc52c01fe785774271504b1e04664}"
-  : "${MORPH_NODE_EXTRA_FLAGS:=}"
+  : "${MORPH_NODE_EXTRA_FLAGS:=--hoodi}"
   : "${CONFIG_ZIP_URL:=https://raw.githubusercontent.com/morph-l2/run-morph-node/main/hoodi/data.zip}"
   : "${CONFIG_ZIP_PATH:=./local-test/hoodi-data.zip}"
   : "${MORPH_CHAIN:=hoodi}"
diff --git a/local-test/node-start.sh b/local-test/node-start.sh
index 3f74a4b..b6038a5 100755
--- a/local-test/node-start.sh
+++ b/local-test/node-start.sh
@@ -29,6 +29,7 @@ args=(
   --l2.eth "http://${RETH_HTTP_ADDR}:${RETH_HTTP_PORT}"
   --l2.engine "http://${RETH_AUTHRPC_ADDR}:${RETH_AUTHRPC_PORT}"
   --l1.rpc "${MORPH_NODE_L1_RPC}"
+  --l1.beaconrpc "${MORPH_NODE_L1_BEACON_RPC}"
   --sync.depositContractAddr "${MORPH_NODE_DEPOSIT_CONTRACT}"
   --log.filename "${NODE_LOG_FILE}"
 )