diff --git a/CHANGELOG.md b/CHANGELOG.md
index e4788966b2..dae6287e05 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,7 @@ Changes:
 - Support Moonbeam author extraction on `derive.chain.*` (w/ shared logic dedupe)
 - Cater for older `BlockBuilder 2/3/4` & `GrandpaApi 2` runtime interface definitions
 - Support for `NominationPoolsApi` runtime interface
+- Support for `DebugRuntimeApi` runtime interface, Frontier-specific
 - Support for `NimbusApi` runtime interface (& older `AuthorFilterAPI`)
 - Add Kusama 9250 upgrade block
 
diff --git a/packages/types/src/interfaces/eth/definitions.ts b/packages/types/src/interfaces/eth/definitions.ts
index 53fc20ab0c..54964d3812 100644
--- a/packages/types/src/interfaces/eth/definitions.ts
+++ b/packages/types/src/interfaces/eth/definitions.ts
@@ -295,7 +295,31 @@ const types: DefinitionsTypes = objectSpread({}, V0, V1, V2, {
       None: 'Null'
     }
   },
-  EthTransaction: 'LegacyTransaction',
+  EthTransaction: {
+    hash: 'H256',
+    nonce: 'U256',
+    blockHash: 'Option<H256>',
+    blockNumber: 'Option<U256>',
+    transactionIndex: 'Option<U256>',
+    from: 'H160',
+    to: 'Option<H160>',
+    value: 'U256',
+    gasPrice: 'Option<U256>',
+    maxFeePerGas: 'Option<U256>',
+    maxPriorityFeePerGas: 'Option<U256>',
+    gas: 'U256',
+    input: 'Bytes',
+    creates: 'Option<H160>',
+    raw: 'Bytes',
+    publicKey: 'Option<H512>',
+    chainId: 'Option<U64>',
+    standardV: 'U256',
+    v: 'U256',
+    r: 'U256',
+    s: 'U256',
+    accessList: 'Option<Vec<EthAccessListItem>>',
+    transactionType: 'Option<U256>'
+  },
   EthTransactionSignature: {
     v: 'u64',
     r: 'H256',
diff --git a/packages/types/src/interfaces/eth/runtime.ts b/packages/types/src/interfaces/eth/runtime.ts
index 6f48e6ba88..fbc030fea6 100644
--- a/packages/types/src/interfaces/eth/runtime.ts
+++ b/packages/types/src/interfaces/eth/runtime.ts
@@ -21,6 +21,41 @@ export const runtime: DefinitionsCall = {
       version: 2
     }
   ],
+  DebugRuntimeApi: [
+    {
+      methods: {
+        trace_block: {
+          description: 'Trace all block extrinsics',
+          params: [
+            {
+              name: 'extrinsics',
+              type: 'Vec<Extrinsic>'
+            },
+            {
+              name: 'knownTransactions',
+              type: 'Vec<H256>'
+            }
+          ],
+          type: 'Result<(), DispatchError>'
+        },
+        trace_transaction: {
+          description: 'Trace transaction extrinsics',
+          params: [
+            {
+              name: 'extrinsics',
+              type: 'Vec<Extrinsic>'
+            },
+            {
+              name: 'transaction',
+              type: 'EthTransaction'
+            }
+          ],
+          type: 'Result<(), DispatchError>'
+        }
+      },
+      version: 4
+    }
+  ],
   EthereumRuntimeRPCApi: [
     {
       methods: {