diff --git a/packages/blockfrost/src/BlockfrostToOgmios.ts b/packages/blockfrost/src/BlockfrostToOgmios.ts
index 5f4d806711e..7864ba45bae 100644
--- a/packages/blockfrost/src/BlockfrostToOgmios.ts
+++ b/packages/blockfrost/src/BlockfrostToOgmios.ts
@@ -64,6 +64,7 @@ export const BlockfrostToOgmios = {
   currentWalletProtocolParameters: (
     blockfrost: Responses['epoch_param_content']
   ): ProtocolParametersRequiredByWallet => ({
+    maxTxSize: Number(blockfrost.max_tx_size),
     minFeeCoefficient: blockfrost.min_fee_a,
     minFeeConstant: blockfrost.min_fee_b,
     stakeKeyDeposit: Number(blockfrost.key_deposit),
diff --git a/packages/blockfrost/test/blockfrostProvider.test.ts b/packages/blockfrost/test/blockfrostProvider.test.ts
index 3c62063d954..e9715ee584c 100644
--- a/packages/blockfrost/test/blockfrostProvider.test.ts
+++ b/packages/blockfrost/test/blockfrostProvider.test.ts
@@ -295,6 +295,7 @@ describe('blockfrostProvider', () => {
         protocol_major_ver: 5,
         protocol_minor_ver: 0,
         min_pool_cost: '340000000',
+        max_tx_size: '16384',
         max_val_size: '1000',
         max_collateral_inputs: 1,
         coins_per_utxo_word: '0'
@@ -313,6 +314,7 @@ describe('blockfrostProvider', () => {
       poolDeposit: 500_000_000,
       protocolVersion: { major: 5, minor: 0 },
       minPoolCost: 340_000_000,
+      maxTxSize: 16_384,
       maxValueSize: 1000,
       maxCollateralInputs: 1,
       coinsPerUtxoWord: 0
diff --git a/packages/cardano-graphql-db-sync/src/CardanoGraphqlToOgmios.ts b/packages/cardano-graphql-db-sync/src/CardanoGraphqlToOgmios.ts
index ccdc8f42127..cb71ba19eed 100644
--- a/packages/cardano-graphql-db-sync/src/CardanoGraphqlToOgmios.ts
+++ b/packages/cardano-graphql-db-sync/src/CardanoGraphqlToOgmios.ts
@@ -16,6 +16,7 @@ export type GraphqlCurrentWalletProtocolParameters = {
   maxValSize: string;
   keyDeposit: number;
   maxCollateralInputs: number;
+  maxTxSize: number;
   minFeeA: number;
   minFeeB: number;
   minPoolCost: number;
@@ -46,6 +47,7 @@ export const CardanoGraphqlToOgmios = {
     ...params,
     maxValueSize: Number(params.maxValSize),
     stakeKeyDeposit: params.keyDeposit,
+    maxTxSize: params.maxTxSize,
     minFeeCoefficient: params.minFeeA,
     minFeeConstant: params.minFeeB
   })
diff --git a/packages/cardano-graphql-db-sync/src/cardanoGraphqlDbSyncProvider.ts b/packages/cardano-graphql-db-sync/src/cardanoGraphqlDbSyncProvider.ts
index d5ee4486fc5..3d0b5248c95 100644
--- a/packages/cardano-graphql-db-sync/src/cardanoGraphqlDbSyncProvider.ts
+++ b/packages/cardano-graphql-db-sync/src/cardanoGraphqlDbSyncProvider.ts
@@ -133,6 +133,7 @@ export const cardanoGraphqlDbSyncProvider = (uri: string): CardanoProvider => {
           currentEpoch {
             protocolParams {
               coinsPerUtxoWord
+              maxTxSize
               maxValSize
               keyDeposit
               maxCollateralInputs
diff --git a/packages/cardano-graphql-db-sync/test/cardanoGraphqlDbSyncProvider.test.ts b/packages/cardano-graphql-db-sync/test/cardanoGraphqlDbSyncProvider.test.ts
index a750b513e3b..37e7553f8dd 100644
--- a/packages/cardano-graphql-db-sync/test/cardanoGraphqlDbSyncProvider.test.ts
+++ b/packages/cardano-graphql-db-sync/test/cardanoGraphqlDbSyncProvider.test.ts
@@ -180,6 +180,7 @@ describe('cardanoGraphqlDbSyncProvider', () => {
         currentEpoch: {
           protocolParams: {
             coinsPerUtxoWord: 34_482,
+            maxTxSize: 16_384,
             maxValSize: '5000',
             keyDeposit: 2_000_000,
             maxCollateralInputs: 3,
@@ -203,6 +204,7 @@ describe('cardanoGraphqlDbSyncProvider', () => {
 
     expect(response).toMatchObject<ProtocolParametersRequiredByWallet>({
       coinsPerUtxoWord: 34_482,
+      maxTxSize: 16_384,
       maxValueSize: 5000,
       stakeKeyDeposit: 2_000_000,
       maxCollateralInputs: 3,
diff --git a/packages/core/src/Provider/CardanoProvider.ts b/packages/core/src/Provider/CardanoProvider.ts
index cb6a98745e9..5b7546a40c4 100644
--- a/packages/core/src/Provider/CardanoProvider.ts
+++ b/packages/core/src/Provider/CardanoProvider.ts
@@ -6,6 +6,7 @@ import { Tx } from '../Transaction';
 export type ProtocolParametersRequiredByWallet = Pick<
   ProtocolParametersAlonzo,
   | 'coinsPerUtxoWord'
+  | 'maxTxSize'
   | 'maxValueSize'
   | 'stakeKeyDeposit'
   | 'maxCollateralInputs'