diff --git a/contracts/src/bridge/ISequencerInbox.sol b/contracts/src/bridge/ISequencerInbox.sol
index d801dca356..994c7c0126 100644
--- a/contracts/src/bridge/ISequencerInbox.sol
+++ b/contracts/src/bridge/ISequencerInbox.sol
@@ -69,6 +69,8 @@ interface ISequencerInbox is IDelayedMessageProvider {
 
     function isBatchPoster(address) external view returns (bool);
 
+    function isSequencer(address) external view returns (bool);
+
     struct DasKeySetInfo {
         bool isValidKeyset;
         uint64 creationBlock;
@@ -154,6 +156,14 @@ interface ISequencerInbox is IDelayedMessageProvider {
      */
     function invalidateKeysetHash(bytes32 ksHash) external;
 
+    /**
+     * @notice Updates whether an address is authorized to be a sequencer.
+     * @dev The IsSequencer information is used only off-chain by the nitro node to validate sequencer feed signer.
+     * @param addr the address
+     * @param isSequencer_ if the specified address should be authorized as a sequencer
+     */
+    function setIsSequencer(address addr, bool isSequencer_) external;
+
     // ---------- initializer ----------
 
     function initialize(IBridge bridge_, MaxTimeVariation calldata maxTimeVariation_) external;
diff --git a/contracts/src/bridge/SequencerInbox.sol b/contracts/src/bridge/SequencerInbox.sol
index 5072359b09..c95cd70b72 100644
--- a/contracts/src/bridge/SequencerInbox.sol
+++ b/contracts/src/bridge/SequencerInbox.sol
@@ -64,6 +64,8 @@ contract SequencerInbox is DelegateCallAware, GasRefundEnabled, ISequencerInbox
 
     uint256 internal immutable deployTimeChainId = block.chainid;
 
+    mapping(address => bool) public isSequencer;
+
     function _chainIdChanged() internal view returns (bool) {
         return deployTimeChainId != block.chainid;
     }
@@ -450,6 +452,12 @@ contract SequencerInbox is DelegateCallAware, GasRefundEnabled, ISequencerInbox
         emit OwnerFunctionCalled(3);
     }
 
+    /// @inheritdoc ISequencerInbox
+    function setIsSequencer(address addr, bool isSequencer_) external onlyRollupOwner {
+        isSequencer[addr] = isSequencer_;
+        emit OwnerFunctionCalled(4);
+    }
+
     function isValidKeysetHash(bytes32 ksHash) external view returns (bool) {
         return dasKeySetInfo[ksHash].isValidKeyset;
     }
diff --git a/contracts/test/storage/SequencerInbox.dot b/contracts/test/storage/SequencerInbox.dot
index 81ca079da4..f9ea05abe5 100644
--- a/contracts/test/storage/SequencerInbox.dot
+++ b/contracts/test/storage/SequencerInbox.dot
@@ -4,7 +4,7 @@ rankdir=LR
 color=black
 arrowhead=open
 node [shape=record, style=filled, fillcolor=gray95 fontname="Courier New"]
-3 [label="SequencerInbox \<\<Contract\>\>\n | {{ slot| 0 | 1 | 2 | 3 | 4-7 | 8 } | { type: \<inherited contract\>.variable (bytes) | {  uint256: totalDelayedMessagesRead (32) } | {  unallocated (12)  |  IBridge: bridge (20) } | {  unallocated (12)  |  IOwnable: rollup (20) } | {  mapping\(address=\>bool\): isBatchPoster (32) } | { <9> ISequencerInbox.MaxTimeVariation: maxTimeVariation (128) } | { <12> mapping\(bytes32=\>DasKeySetInfo\): dasKeySetInfo (32) }}}"]
+3 [label="SequencerInbox \<\<Contract\>\>\n | {{ slot| 0 | 1 | 2 | 3 | 4-7 | 8 | 9 } | { type: \<inherited contract\>.variable (bytes) | {  uint256: totalDelayedMessagesRead (32) } | {  unallocated (12)  |  IBridge: bridge (20) } | {  unallocated (12)  |  IOwnable: rollup (20) } | {  mapping\(address=\>bool\): isBatchPoster (32) } | { <9> ISequencerInbox.MaxTimeVariation: maxTimeVariation (128) } | { <12> mapping\(bytes32=\>DasKeySetInfo\): dasKeySetInfo (32) } | {  mapping\(address=\>bool\): isSequencer (32) }}}"]
 
 1 [label="ISequencerInbox.MaxTimeVariation \<\<Struct\>\>\n | {{ slot| 4 | 5 | 6 | 7 } | { type: variable (bytes) | {  uint256: MaxTimeVariation.delayBlocks (32) } | {  uint256: MaxTimeVariation.futureBlocks (32) } | {  uint256: MaxTimeVariation.delaySeconds (32) } | {  uint256: MaxTimeVariation.futureSeconds (32) }}}"]