diff --git a/src/server/middleware/error.ts b/src/server/middleware/error.ts
index 92dbf820..7b61b4ca 100644
--- a/src/server/middleware/error.ts
+++ b/src/server/middleware/error.ts
@@ -42,6 +42,13 @@ export const badChainError = (chain: string | number): CustomError =>
     "INVALID_CHAIN",
   );
 
+export const badBigIntError = (variableName: string): CustomError =>
+  createCustomError(
+    `Invalid BigInt: ${variableName}`,
+    StatusCodes.BAD_REQUEST,
+    "INVALID_BIGINT",
+  );
+
 const flipObject = (data: object) =>
   Object.fromEntries(Object.entries(data).map(([key, value]) => [value, key]));
 
diff --git a/src/server/routes/backend-wallet/send-transaction.ts b/src/server/routes/backend-wallet/send-transaction.ts
index 13e2a8f3..3d783338 100644
--- a/src/server/routes/backend-wallet/send-transaction.ts
+++ b/src/server/routes/backend-wallet/send-transaction.ts
@@ -17,6 +17,10 @@ import {
 } from "../../schemas/wallet";
 import { getChainIdFromChain } from "../../utils/chain";
 import { parseTransactionOverrides } from "../../utils/transaction-overrides";
+import {
+  authorizationListSchema,
+  toParsedAuthorization,
+} from "../../schemas/transaction/authorization";
 
 const requestBodySchema = Type.Object({
   toAddress: Type.Optional(AddressSchema),
@@ -26,6 +30,7 @@ const requestBodySchema = Type.Object({
   value: Type.String({
     examples: ["10000000"],
   }),
+  authorizationList: authorizationListSchema,
   ...txOverridesSchema.properties,
 });
 
@@ -65,7 +70,8 @@ export async function sendTransaction(fastify: FastifyInstance) {
     },
     handler: async (request, reply) => {
       const { chain } = request.params;
-      const { toAddress, data, value, txOverrides } = request.body;
+      const { toAddress, data, value, txOverrides, authorizationList } =
+        request.body;
       const { simulateTx } = request.query;
       const {
         "x-backend-wallet-address": fromAddress,
@@ -110,6 +116,7 @@ export async function sendTransaction(fastify: FastifyInstance) {
             data: data as Hex,
             transactionMode: transactionMode,
             value: BigInt(value),
+            authorizationList: authorizationList?.map(toParsedAuthorization),
             ...parseTransactionOverrides(txOverrides),
           },
           shouldSimulate: simulateTx,
diff --git a/src/server/schemas/transaction/authorization.ts b/src/server/schemas/transaction/authorization.ts
new file mode 100644
index 00000000..3f6e9953
--- /dev/null
+++ b/src/server/schemas/transaction/authorization.ts
@@ -0,0 +1,30 @@
+import { type Static, Type } from "@sinclair/typebox";
+import { AddressSchema } from "../address";
+import { requiredAddress } from "../wallet";
+import { requiredBigInt } from "../../../shared/utils/primitive-types";
+
+export const authorizationSchema = Type.Object({
+  address: AddressSchema,
+  chainId: Type.Integer(),
+  nonce: Type.String(),
+  r: Type.String(),
+  s: Type.String(),
+  yParity: Type.Number(),
+});
+
+export const authorizationListSchema = Type.Optional(
+  Type.Array(authorizationSchema),
+);
+
+export const toParsedAuthorization = (
+  authorization: Static<typeof authorizationSchema>,
+) => {
+  return {
+    address: requiredAddress(authorization.address, "[Authorization List]"),
+    chainId: authorization.chainId,
+    nonce: requiredBigInt(authorization.nonce, "[Authorization List] -> nonce"),
+    r: requiredBigInt(authorization.r, "[Authorization List] -> r"),
+    s: requiredBigInt(authorization.s, "[Authorization List] -> s"),
+    yParity: authorization.yParity,
+  };
+};
diff --git a/src/server/utils/transaction-overrides.ts b/src/server/utils/transaction-overrides.ts
index 443758ef..06575dc4 100644
--- a/src/server/utils/transaction-overrides.ts
+++ b/src/server/utils/transaction-overrides.ts
@@ -1,6 +1,5 @@
 import type { Static } from "@sinclair/typebox";
 import { maybeBigInt } from "../../shared/utils/primitive-types";
-import type { InsertedTransaction } from "../../shared/utils/transaction/types";
 import type {
   txOverridesSchema,
   txOverridesWithValueSchema,
@@ -10,7 +9,7 @@ export const parseTransactionOverrides = (
   overrides:
     | Static<typeof txOverridesSchema>["txOverrides"]
     | Static<typeof txOverridesWithValueSchema>["txOverrides"],
-): Partial<InsertedTransaction> => {
+) => {
   if (!overrides) {
     return {};
   }
diff --git a/src/shared/utils/primitive-types.ts b/src/shared/utils/primitive-types.ts
index 759902bc..5f7f30cc 100644
--- a/src/shared/utils/primitive-types.ts
+++ b/src/shared/utils/primitive-types.ts
@@ -1,10 +1,19 @@
 import type { Address } from "thirdweb";
 import { checksumAddress } from "thirdweb/utils";
+import { badBigIntError } from "../../server/middleware/error";
 
 export const maybeBigInt = (val?: string) => (val ? BigInt(val) : undefined);
 export const maybeInt = (val?: string) =>
   val ? Number.parseInt(val) : undefined;
 
+export function requiredBigInt(val: string, variableName: string) {
+  try {
+    return BigInt(val);
+  } catch {
+    throw badBigIntError(variableName);
+  }
+}
+
 // These overloads hint TS at the response type (ex: Address if `val` is Address).
 export function normalizeAddress(val: Address): Address;
 export function normalizeAddress(val?: Address): Address | undefined;
diff --git a/src/shared/utils/transaction/types.ts b/src/shared/utils/transaction/types.ts
index 6b28b88d..920e23f4 100644
--- a/src/shared/utils/transaction/types.ts
+++ b/src/shared/utils/transaction/types.ts
@@ -1,4 +1,10 @@
-import type { Address, Hex, toSerializableTransaction } from "thirdweb";
+import {
+  signAuthorization,
+  SignedAuthorization,
+  type Address,
+  type Hex,
+  type toSerializableTransaction,
+} from "thirdweb";
 import type { TransactionType } from "viem";
 
 // TODO: Replace with thirdweb SDK exported type when available.
@@ -30,6 +36,7 @@ export type InsertedTransaction = {
   value?: bigint;
 
   data?: Hex;
+  authorizationList?: SignedAuthorization[];
   functionName?: string;
   functionArgs?: unknown[];