diff --git a/CHANGELOG.md b/CHANGELOG.md
index b5cb1894..eb27bd74 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,8 @@
 # Changelog
+## [1.5.2] - 2024-02-12
+### New
+- Added `GenericBundler` and `EtherspotBundler` as bundlerProviders and removed bundlerUrl params from SdkOptions
+
 ## [1.5.1] - 2024-02-08
 ### Bug fixes
 - Added `key` param on SimpleAccount and ZeroDev wallets
diff --git a/README.md b/README.md
index 9b262cd1..bc3646de 100644
--- a/README.md
+++ b/README.md
@@ -36,6 +36,8 @@ npm i @etherspot/prime-sdk
 Or follow our introductory guide on our docs [here](https://etherspot.fyi/getting-started) which walk you through 
 cloning down an example repo and setting up a dapp in your own environment. 
 
+The mainnet bundler API key `eyJvcmciOiI2NTIzZjY5MzUwOTBmNzAwMDFiYjJkZWIiLCJpZCI6IjMxMDZiOGY2NTRhZTRhZTM4MGVjYjJiN2Q2NDMzMjM4IiwiaCI6Im11cm11cjEyOCJ9` is included in the example programs which is a public API key with rate limits, to get higher limits register to https://portal.etherspot.io
+
 ## 📖 Documentation
 
 - [Quick Start](https://etherspot.fyi/getting-started)
diff --git a/examples/01-get-address.ts b/examples/01-get-address.ts
index 6e09f902..2785a1a7 100644
--- a/examples/01-get-address.ts
+++ b/examples/01-get-address.ts
@@ -1,12 +1,14 @@
-import { PrimeSdk } from '../src';
+import { EtherspotBundler, PrimeSdk } from '../src';
 import * as dotenv from 'dotenv';
 
 dotenv.config();
 
 
 async function main() {
+  const bundlerApiKey = 'eyJvcmciOiI2NTIzZjY5MzUwOTBmNzAwMDFiYjJkZWIiLCJpZCI6IjMxMDZiOGY2NTRhZTRhZTM4MGVjYjJiN2Q2NDMzMjM4IiwiaCI6Im11cm11cjEyOCJ9';
+  const customBundlerUrl = '';
   // initializating sdk...
-  const primeSdk = new PrimeSdk({ privateKey: process.env.WALLET_PRIVATE_KEY }, { chainId: Number(process.env.CHAIN_ID), projectKey: 'public-prime-testnet-key' })
+  const primeSdk = new PrimeSdk({ privateKey: process.env.WALLET_PRIVATE_KEY }, { chainId: Number(process.env.CHAIN_ID), projectKey: 'public-prime-testnet-key', bundlerProvider: new EtherspotBundler(Number(process.env.CHAIN_ID), bundlerApiKey, customBundlerUrl) }) // Testnets dont need apiKey on bundlerProvider
 
   // get EtherspotWallet address...
   const address: string = await primeSdk.getCounterFactualAddress();
diff --git a/examples/02-transfer-funds.ts b/examples/02-transfer-funds.ts
index 6e34b072..845dcee3 100644
--- a/examples/02-transfer-funds.ts
+++ b/examples/02-transfer-funds.ts
@@ -1,5 +1,5 @@
 import { ethers } from 'ethers';
-import { PrimeSdk } from '../src';
+import { EtherspotBundler, PrimeSdk } from '../src';
 import { printOp } from '../src/sdk/common/OperationUtils';
 import * as dotenv from 'dotenv';
 import { sleep } from '../src/sdk/common';
@@ -8,10 +8,11 @@ dotenv.config();
 
 const recipient = '0x80a1874E1046B1cc5deFdf4D3153838B72fF94Ac'; // recipient wallet address
 const value = '0.00001'; // transfer value
+const bundlerApiKey = 'eyJvcmciOiI2NTIzZjY5MzUwOTBmNzAwMDFiYjJkZWIiLCJpZCI6IjMxMDZiOGY2NTRhZTRhZTM4MGVjYjJiN2Q2NDMzMjM4IiwiaCI6Im11cm11cjEyOCJ9';
 
 async function main() {
   // initializating sdk...
-  const primeSdk = new PrimeSdk({ privateKey: process.env.WALLET_PRIVATE_KEY }, { chainId: Number(process.env.CHAIN_ID), projectKey: 'public-prime-testnet-key' })
+  const primeSdk = new PrimeSdk({ privateKey: process.env.WALLET_PRIVATE_KEY }, { chainId: Number(process.env.CHAIN_ID), projectKey: 'public-prime-testnet-key', bundlerProvider: new EtherspotBundler(Number(process.env.CHAIN_ID), bundlerApiKey) })
 
   console.log('address: ', primeSdk.state.EOAAddress)
 
diff --git a/examples/03-transfer-erc20.ts b/examples/03-transfer-erc20.ts
index d5502798..ad661ded 100644
--- a/examples/03-transfer-erc20.ts
+++ b/examples/03-transfer-erc20.ts
@@ -1,5 +1,5 @@
 import { ethers } from 'ethers';
-import { PrimeSdk } from '../src';
+import { EtherspotBundler, PrimeSdk } from '../src';
 import { printOp } from '../src/sdk/common/OperationUtils';
 import { ERC20_ABI } from '../src/sdk/helpers/abi/ERC20_ABI';
 import * as dotenv from 'dotenv';
@@ -11,10 +11,11 @@ dotenv.config();
 const recipient = '0x80a1874E1046B1cc5deFdf4D3153838B72fF94Ac'; // recipient wallet address
 const value = '0.1'; // transfer value
 const tokenAddress = '0x326C977E6efc84E512bB9C30f76E30c160eD06FB';
+const bundlerApiKey = 'eyJvcmciOiI2NTIzZjY5MzUwOTBmNzAwMDFiYjJkZWIiLCJpZCI6IjMxMDZiOGY2NTRhZTRhZTM4MGVjYjJiN2Q2NDMzMjM4IiwiaCI6Im11cm11cjEyOCJ9';
 
 async function main() {
   // initializating sdk...
-  const primeSdk = new PrimeSdk({ privateKey: process.env.WALLET_PRIVATE_KEY }, { chainId: Number(process.env.CHAIN_ID), projectKey: 'public-prime-testnet-key' })
+  const primeSdk = new PrimeSdk({ privateKey: process.env.WALLET_PRIVATE_KEY }, { chainId: Number(process.env.CHAIN_ID), projectKey: 'public-prime-testnet-key', bundlerProvider: new EtherspotBundler(Number(process.env.CHAIN_ID), bundlerApiKey) })
 
   console.log('address: ', primeSdk.state.EOAAddress)
 
diff --git a/examples/04-transfer-nft.ts b/examples/04-transfer-nft.ts
index 2a2efb23..b53a320b 100644
--- a/examples/04-transfer-nft.ts
+++ b/examples/04-transfer-nft.ts
@@ -1,5 +1,5 @@
 import { ethers } from 'ethers';
-import { PrimeSdk } from '../src';
+import { EtherspotBundler, PrimeSdk } from '../src';
 import { printOp } from '../src/sdk/common/OperationUtils';
 import * as dotenv from 'dotenv';
 import { sleep } from '../src/sdk/common';
@@ -10,10 +10,11 @@ dotenv.config();
 const recipient = '0xD129dB5e418e389c3F7D3ae0B8771B3f76799A52'; // recipient wallet address
 const tokenAddress = '0xe55C5793a52AF819fBf3e87a23B36708E6FDd2Cc';
 const tokenId = 4;
+const bundlerApiKey = 'eyJvcmciOiI2NTIzZjY5MzUwOTBmNzAwMDFiYjJkZWIiLCJpZCI6IjMxMDZiOGY2NTRhZTRhZTM4MGVjYjJiN2Q2NDMzMjM4IiwiaCI6Im11cm11cjEyOCJ9';
 
 async function main() {
   // initializating sdk...
-  const primeSdk = new PrimeSdk({ privateKey: process.env.WALLET_PRIVATE_KEY }, { chainId: Number(process.env.CHAIN_ID), projectKey: 'public-prime-testnet-key' })
+  const primeSdk = new PrimeSdk({ privateKey: process.env.WALLET_PRIVATE_KEY }, { chainId: Number(process.env.CHAIN_ID), projectKey: 'public-prime-testnet-key', bundlerProvider: new EtherspotBundler(Number(process.env.CHAIN_ID), bundlerApiKey) })
 
   console.log('address: ', primeSdk.state.EOAAddress)
 
diff --git a/examples/12-add-guardians.ts b/examples/12-add-guardians.ts
index 590e284c..08f94846 100644
--- a/examples/12-add-guardians.ts
+++ b/examples/12-add-guardians.ts
@@ -1,5 +1,5 @@
 import { ethers } from 'ethers';
-import { PrimeSdk } from '../src';
+import { EtherspotBundler, PrimeSdk } from '../src';
 import { printOp } from '../src/sdk/common/OperationUtils';
 import * as dotenv from 'dotenv';
 import { sleep } from '../src/sdk/common';
@@ -7,10 +7,12 @@ import { sleep } from '../src/sdk/common';
 dotenv.config();
 
 async function main() {
+  const bundlerApiKey = 'eyJvcmciOiI2NTIzZjY5MzUwOTBmNzAwMDFiYjJkZWIiLCJpZCI6IjMxMDZiOGY2NTRhZTRhZTM4MGVjYjJiN2Q2NDMzMjM4IiwiaCI6Im11cm11cjEyOCJ9';
+  
   // initializating sdk...
   const primeSdk = new PrimeSdk(
     { privateKey: process.env.WALLET_PRIVATE_KEY },
-    { chainId: Number(process.env.CHAIN_ID), projectKey: 'public-prime-testnet-key' },
+    { chainId: Number(process.env.CHAIN_ID), projectKey: 'public-prime-testnet-key', bundlerProvider: new EtherspotBundler(Number(process.env.CHAIN_ID), bundlerApiKey) },
   );
 
   console.log('address: ', primeSdk.state.EOAAddress);
diff --git a/examples/13-paymaster.ts b/examples/13-paymaster.ts
index 4096747a..ac01217d 100644
--- a/examples/13-paymaster.ts
+++ b/examples/13-paymaster.ts
@@ -1,5 +1,5 @@
 import { ethers } from 'ethers';
-import { PrimeSdk } from '../src';
+import { EtherspotBundler, PrimeSdk } from '../src';
 import { printOp } from '../src/sdk/common/OperationUtils';
 import * as dotenv from 'dotenv';
 import { sleep } from '../src/sdk/common';
@@ -9,11 +9,13 @@ dotenv.config();
 const recipient = '0x80a1874E1046B1cc5deFdf4D3153838B72fF94Ac'; // recipient wallet address
 const value = '0.01'; // transfer value
 const api_key = 'arka_public_key'; // Only testnets are available, if you need further assistance in setting up a paymaster service for your dapp, please reach out to us on discord or https://etherspot.fyi/arka/intro
+const bundlerApiKey = 'eyJvcmciOiI2NTIzZjY5MzUwOTBmNzAwMDFiYjJkZWIiLCJpZCI6IjMxMDZiOGY2NTRhZTRhZTM4MGVjYjJiN2Q2NDMzMjM4IiwiaCI6Im11cm11cjEyOCJ9';
 
 async function main() {
   // initializating sdk...
   const primeSdk = new PrimeSdk({ privateKey: process.env.WALLET_PRIVATE_KEY }, {
     chainId: Number(process.env.CHAIN_ID), projectKey: 'public-prime-testnet-key',
+    bundlerProvider: new EtherspotBundler(Number(process.env.CHAIN_ID), bundlerApiKey)
   })
 
   console.log('address: ', primeSdk.state.EOAAddress)
diff --git a/examples/14-zeroDev-address.ts b/examples/14-zeroDev-address.ts
index dd72b2c0..facd2890 100644
--- a/examples/14-zeroDev-address.ts
+++ b/examples/14-zeroDev-address.ts
@@ -1,12 +1,15 @@
-import { Factory, PrimeSdk } from '../src';
+import { EtherspotBundler, Factory, PrimeSdk } from '../src';
 import * as dotenv from 'dotenv';
 
 dotenv.config();
 
 
 async function main() {
+  const bundlerApiKey = 'eyJvcmciOiI2NTIzZjY5MzUwOTBmNzAwMDFiYjJkZWIiLCJpZCI6IjMxMDZiOGY2NTRhZTRhZTM4MGVjYjJiN2Q2NDMzMjM4IiwiaCI6Im11cm11cjEyOCJ9';
   // initializating sdk...
-  const primeSdk = new PrimeSdk({ privateKey: process.env.WALLET_PRIVATE_KEY }, { chainId: Number(process.env.CHAIN_ID), projectKey: 'public-prime-testnet-key', factoryWallet: Factory.ZERO_DEV })
+  const primeSdk = new PrimeSdk({ privateKey: process.env.WALLET_PRIVATE_KEY }, { chainId: Number(process.env.CHAIN_ID), projectKey: 'public-prime-testnet-key', factoryWallet: Factory.ZERO_DEV, 
+    bundlerProvider: new EtherspotBundler(Number(process.env.CHAIN_ID), bundlerApiKey) 
+  })
 
   // get ZeroDev address...
   const address: string = await primeSdk.getCounterFactualAddress();
diff --git a/examples/15-simpleAccount-address.ts b/examples/15-simpleAccount-address.ts
index 0bca7475..dbf83e1c 100644
--- a/examples/15-simpleAccount-address.ts
+++ b/examples/15-simpleAccount-address.ts
@@ -1,12 +1,15 @@
-import { Factory, PrimeSdk } from '../src';
+import { EtherspotBundler, Factory, PrimeSdk } from '../src';
 import * as dotenv from 'dotenv';
 
 dotenv.config();
 
 
 async function main() {
+  const bundlerApiKey = 'eyJvcmciOiI2NTIzZjY5MzUwOTBmNzAwMDFiYjJkZWIiLCJpZCI6IjMxMDZiOGY2NTRhZTRhZTM4MGVjYjJiN2Q2NDMzMjM4IiwiaCI6Im11cm11cjEyOCJ9';
   // initializating sdk...
-  const primeSdk = new PrimeSdk({ privateKey: process.env.WALLET_PRIVATE_KEY }, { chainId: Number(process.env.CHAIN_ID), projectKey: 'public-prime-testnet-key', factoryWallet: Factory.SIMPLE_ACCOUNT })
+  const primeSdk = new PrimeSdk({ privateKey: process.env.WALLET_PRIVATE_KEY }, { chainId: Number(process.env.CHAIN_ID), projectKey: 'public-prime-testnet-key', factoryWallet: Factory.SIMPLE_ACCOUNT, 
+    bundlerProvider: new EtherspotBundler(Number(process.env.CHAIN_ID), bundlerApiKey) 
+  })
 
   // get SimpleAccount address...
   const address: string = await primeSdk.getCounterFactualAddress();
diff --git a/examples/16-paymaster-arka.ts b/examples/16-paymaster-arka.ts
index 7854f387..bf18e170 100644
--- a/examples/16-paymaster-arka.ts
+++ b/examples/16-paymaster-arka.ts
@@ -1,5 +1,5 @@
 import { ethers, utils } from 'ethers';
-import { PrimeSdk } from '../src';
+import { EtherspotBundler, PrimeSdk } from '../src';
 import { printOp } from '../src/sdk/common/OperationUtils';
 import * as dotenv from 'dotenv';
 import { sleep } from '../src/sdk/common';
@@ -9,6 +9,7 @@ dotenv.config();
 
 const recipient = '0x80a1874E1046B1cc5deFdf4D3153838B72fF94Ac'; // recipient wallet address
 const value = '0.0001'; // transfer value
+const bundlerApiKey = 'eyJvcmciOiI2NTIzZjY5MzUwOTBmNzAwMDFiYjJkZWIiLCJpZCI6IjMxMDZiOGY2NTRhZTRhZTM4MGVjYjJiN2Q2NDMzMjM4IiwiaCI6Im11cm11cjEyOCJ9';
 
 const arka_api_key = 'arka_public_key';
 const arka_url = 'https://arka.etherspot.io'; // Only testnets are available, if you need further assistance in setting up a paymaster service for your dapp, please reach out to us on discord or https://etherspot.fyi/arka/intro
@@ -18,6 +19,7 @@ async function main() {
   // initializing sdk...
   const primeSdk = new PrimeSdk({ privateKey: process.env.WALLET_PRIVATE_KEY }, {
     chainId: Number(process.env.CHAIN_ID), projectKey: 'public-prime-testnet-key',
+    bundlerProvider: new EtherspotBundler(Number(process.env.CHAIN_ID), bundlerApiKey)
   })
 
   console.log('address: ', primeSdk.state.EOAAddress)
diff --git a/examples/19-paymaster-validUntil-validAfter.ts b/examples/19-paymaster-validUntil-validAfter.ts
index 6606f64f..91ec382b 100644
--- a/examples/19-paymaster-validUntil-validAfter.ts
+++ b/examples/19-paymaster-validUntil-validAfter.ts
@@ -1,5 +1,5 @@
 import { ethers } from 'ethers';
-import { PrimeSdk } from '../src';
+import { EtherspotBundler, PrimeSdk } from '../src';
 import { printOp } from '../src/sdk/common/OperationUtils';
 import * as dotenv from 'dotenv';
 import { sleep } from '../src/sdk/common';
@@ -8,6 +8,7 @@ dotenv.config();
 
 const recipient = '0x80a1874E1046B1cc5deFdf4D3153838B72fF94Ac'; // recipient wallet address
 const value = '0.0001'; // transfer value
+const bundlerApiKey = 'eyJvcmciOiI2NTIzZjY5MzUwOTBmNzAwMDFiYjJkZWIiLCJpZCI6IjMxMDZiOGY2NTRhZTRhZTM4MGVjYjJiN2Q2NDMzMjM4IiwiaCI6Im11cm11cjEyOCJ9';
 
 const arka_api_key = 'arka_public_key'; // Only testnets are available, if you need further assistance in setting up a paymaster service for your dapp, please reach out to us on discord or https://etherspot.fyi/arka/intro
 const arka_url = 'https://arka.etherspot.io';
@@ -16,7 +17,7 @@ const queryString = `?apiKey=${arka_api_key}&chainId=${Number(process.env.CHAIN_
 async function main() {
     // initializing sdk...
     const primeSdk = new PrimeSdk({ privateKey: process.env.WALLET_PRIVATE_KEY }, {
-        chainId: Number(process.env.CHAIN_ID), projectKey: 'public-prime-testnet-key',
+        chainId: Number(process.env.CHAIN_ID), projectKey: 'public-prime-testnet-key', bundlerProvider: new EtherspotBundler(Number(process.env.CHAIN_ID), bundlerApiKey)
     })
 
     console.log('address: ', primeSdk.state.EOAAddress)
diff --git a/examples/20-callGasLimit.ts b/examples/20-callGasLimit.ts
index 6eca5432..fb749804 100644
--- a/examples/20-callGasLimit.ts
+++ b/examples/20-callGasLimit.ts
@@ -1,5 +1,5 @@
 import { ethers } from 'ethers';
-import { PrimeSdk } from '../src';
+import { EtherspotBundler, PrimeSdk } from '../src';
 import { printOp } from '../src/sdk/common/OperationUtils';
 import * as dotenv from 'dotenv';
 import { sleep } from '../src/sdk/common';
@@ -8,10 +8,13 @@ dotenv.config();
 
 const recipient = '0x80a1874E1046B1cc5deFdf4D3153838B72fF94Ac'; // recipient wallet address
 const value = '0.0001'; // transfer value
+const bundlerApiKey = 'eyJvcmciOiI2NTIzZjY5MzUwOTBmNzAwMDFiYjJkZWIiLCJpZCI6IjMxMDZiOGY2NTRhZTRhZTM4MGVjYjJiN2Q2NDMzMjM4IiwiaCI6Im11cm11cjEyOCJ9';
 
 async function main() {
   // initializating sdk...
-  const primeSdk = new PrimeSdk({ privateKey: process.env.WALLET_PRIVATE_KEY }, { chainId: Number(process.env.CHAIN_ID), projectKey: 'public-prime-testnet-key' })
+  const primeSdk = new PrimeSdk({ privateKey: process.env.WALLET_PRIVATE_KEY }, { chainId: Number(process.env.CHAIN_ID), projectKey: 'public-prime-testnet-key', 
+    bundlerProvider: new EtherspotBundler(Number(process.env.CHAIN_ID), bundlerApiKey) 
+  })
 
   console.log('address: ', primeSdk.state.EOAAddress)
 
diff --git a/examples/21-get-multiple-accounts.ts b/examples/21-get-multiple-accounts.ts
index 57696c84..98ff06e9 100644
--- a/examples/21-get-multiple-accounts.ts
+++ b/examples/21-get-multiple-accounts.ts
@@ -1,13 +1,15 @@
-import { PrimeSdk } from '../src';
+import { EtherspotBundler, PrimeSdk } from '../src';
 import * as dotenv from 'dotenv';
 
 dotenv.config();
 
+const bundlerApiKey = 'eyJvcmciOiI2NTIzZjY5MzUwOTBmNzAwMDFiYjJkZWIiLCJpZCI6IjMxMDZiOGY2NTRhZTRhZTM4MGVjYjJiN2Q2NDMzMjM4IiwiaCI6Im11cm11cjEyOCJ9';
+
 async function main() {
   // initializating sdk for index 0...
   const primeSdk = new PrimeSdk(
     { privateKey: process.env.WALLET_PRIVATE_KEY },
-    { chainId: Number(process.env.CHAIN_ID), projectKey: 'public-prime-testnet-key' },
+    { chainId: Number(process.env.CHAIN_ID), projectKey: 'public-prime-testnet-key', bundlerProvider: new EtherspotBundler(Number(process.env.CHAIN_ID), bundlerApiKey) },
   );
 
   // get EtherspotWallet address for index 0...
@@ -17,7 +19,7 @@ async function main() {
   // initializating sdk for index 1...
   const primeSdk1 = new PrimeSdk(
     { privateKey: process.env.WALLET_PRIVATE_KEY },
-    { chainId: Number(process.env.CHAIN_ID), projectKey: 'public-prime-testnet-key', index: 1 },
+    { chainId: Number(process.env.CHAIN_ID), projectKey: 'public-prime-testnet-key', index: 1, bundlerProvider: new EtherspotBundler(Number(process.env.CHAIN_ID), bundlerApiKey) },
   );
 
   // get EtherspotWallet address for index 1...
diff --git a/examples/22-concurrent-userops.ts b/examples/22-concurrent-userops.ts
index 779a94bd..5547fe5b 100644
--- a/examples/22-concurrent-userops.ts
+++ b/examples/22-concurrent-userops.ts
@@ -1,5 +1,5 @@
 import { ethers, providers } from 'ethers';
-import { PrimeSdk } from '../src';
+import { EtherspotBundler, PrimeSdk } from '../src';
 import { printOp } from '../src/sdk/common/OperationUtils';
 import * as dotenv from 'dotenv';
 import { sleep } from '../src/sdk/common';
@@ -8,11 +8,14 @@ dotenv.config();
 
 const recipient = '0x80a1874E1046B1cc5deFdf4D3153838B72fF94Ac'; // recipient wallet address
 const value = '0.000001'; // transfer value
+const bundlerApiKey = 'eyJvcmciOiI2NTIzZjY5MzUwOTBmNzAwMDFiYjJkZWIiLCJpZCI6IjMxMDZiOGY2NTRhZTRhZTM4MGVjYjJiN2Q2NDMzMjM4IiwiaCI6Im11cm11cjEyOCJ9';
 
 async function main() {
   const provider = new providers.JsonRpcProvider(process.env.RPC_PROVIDER_URL);
   // initializating sdk...
-  const primeSdk = new PrimeSdk({ privateKey: process.env.WALLET_PRIVATE_KEY }, { chainId: Number(process.env.CHAIN_ID), projectKey: 'public-prime-testnet-key' })
+  const primeSdk = new PrimeSdk({ privateKey: process.env.WALLET_PRIVATE_KEY }, { chainId: Number(process.env.CHAIN_ID), projectKey: 'public-prime-testnet-key', 
+    bundlerProvider: new EtherspotBundler(Number(process.env.CHAIN_ID), bundlerApiKey) 
+  })
 
   console.log('address: ', primeSdk.state.EOAAddress)
 
diff --git a/examples/23-bundlerApiKey.ts b/examples/23-bundlerApiKey.ts
new file mode 100644
index 00000000..bb845ebe
--- /dev/null
+++ b/examples/23-bundlerApiKey.ts
@@ -0,0 +1,21 @@
+import { EtherspotBundler, PrimeSdk } from '../src';
+import * as dotenv from 'dotenv';
+
+dotenv.config();
+
+
+async function main() {
+  const etherspotBundlerApiKey = 'eyJvcmciOiI2NTIzZjY5MzUwOTBmNzAwMDFiYjJkZWIiLCJpZCI6IjMxMDZiOGY2NTRhZTRhZTM4MGVjYjJiN2Q2NDMzMjM4IiwiaCI6Im11cm11cjEyOCJ9';
+  // initializating sdk...
+  const primeSdk = new PrimeSdk({ privateKey: process.env.WALLET_PRIVATE_KEY }, { chainId: Number(process.env.CHAIN_ID), projectKey: 'public-prime-testnet-key', 
+    bundlerProvider: new EtherspotBundler(Number(process.env.CHAIN_ID), etherspotBundlerApiKey) 
+  })
+
+  // get EtherspotWallet address...
+  const address: string = await primeSdk.getCounterFactualAddress();
+  console.log('\x1b[33m%s\x1b[0m', `EtherspotWallet address: ${address}`);
+}
+
+main()
+  .catch(console.error)
+  .finally(() => process.exit());
diff --git a/package-lock.json b/package-lock.json
index eb854407..e3a6e62c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@etherspot/prime-sdk",
-  "version": "1.4.1",
+  "version": "1.5.1",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@etherspot/prime-sdk",
-      "version": "1.4.1",
+      "version": "1.5.1",
       "license": "MIT",
       "dependencies": {
         "@apollo/client": "3.8.7",
diff --git a/package.json b/package.json
index cafc63bc..995ba200 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@etherspot/prime-sdk",
-  "version": "1.5.1",
+  "version": "1.5.2",
   "description": "Etherspot Prime (Account Abstraction) SDK",
   "keywords": [
     "ether",
diff --git a/src/sdk/base/BaseAccountAPI.ts b/src/sdk/base/BaseAccountAPI.ts
index be0757a2..a5dfcf95 100644
--- a/src/sdk/base/BaseAccountAPI.ts
+++ b/src/sdk/base/BaseAccountAPI.ts
@@ -70,21 +70,19 @@ export abstract class BaseAccountAPI {
       throw new Exception('Invalid wallet provider');
     }
 
-    // const env = Env.prepare(optionsLike.env);
-
     const {
       chainId, //
       stateStorage,
       rpcProviderUrl,
-      bundlerRpcUrl,
       factoryWallet,
+      bundlerProvider,
     } = optionsLike;
 
     this.services = {
       networkService: new NetworkService(chainId),
       walletService: new WalletService(params.walletProvider, {
         provider: rpcProviderUrl,
-      }, bundlerRpcUrl, chainId),
+      }, bundlerProvider.url, chainId),
       stateService: new StateService({
         storage: stateStorage,
       }),
diff --git a/src/sdk/bundler/index.ts b/src/sdk/bundler/index.ts
new file mode 100644
index 00000000..e7adc5a7
--- /dev/null
+++ b/src/sdk/bundler/index.ts
@@ -0,0 +1,2 @@
+export * from './interface';
+export * from './providers';
\ No newline at end of file
diff --git a/src/sdk/bundler/interface.ts b/src/sdk/bundler/interface.ts
new file mode 100644
index 00000000..10de729c
--- /dev/null
+++ b/src/sdk/bundler/interface.ts
@@ -0,0 +1,6 @@
+
+export interface BundlerProvider {
+  readonly url: string;
+}
+
+export type BundlerProviderLike = BundlerProvider;
\ No newline at end of file
diff --git a/src/sdk/bundler/providers/EtherspotBundler.ts b/src/sdk/bundler/providers/EtherspotBundler.ts
new file mode 100644
index 00000000..36e345da
--- /dev/null
+++ b/src/sdk/bundler/providers/EtherspotBundler.ts
@@ -0,0 +1,23 @@
+import { Exception } from "../../common";
+import { getNetworkConfig } from "../../network/constants";
+import { BundlerProvider } from "../interface";
+
+export class EtherspotBundler implements BundlerProvider {
+  readonly url: string;
+  readonly apiKey: string;
+  readonly chainId: string;
+
+  constructor(chainId: number, apiKey?: string, bundlerUrl?: string) {
+    if (!bundlerUrl) {
+      const networkConfig = getNetworkConfig(chainId);
+      if (!networkConfig || networkConfig.bundler == '') throw new Exception('No bundler url provided')
+      bundlerUrl = networkConfig.bundler;
+    }
+    if (apiKey) {
+      if (bundlerUrl.includes('?api-key=')) this.url = bundlerUrl + apiKey;
+      else this.url = bundlerUrl + '?api-key=' + apiKey;
+    }
+    else this.url = bundlerUrl;
+    this.apiKey = apiKey;
+  }
+}
\ No newline at end of file
diff --git a/src/sdk/bundler/providers/GenericBundler.ts b/src/sdk/bundler/providers/GenericBundler.ts
new file mode 100644
index 00000000..2446ad75
--- /dev/null
+++ b/src/sdk/bundler/providers/GenericBundler.ts
@@ -0,0 +1,9 @@
+import { BundlerProvider } from "../interface";
+
+
+export class GenericBundler implements BundlerProvider {
+  readonly url: string;
+  constructor(bundlerUrl: string) {
+    this.url = bundlerUrl;
+  }
+}
\ No newline at end of file
diff --git a/src/sdk/bundler/providers/index.ts b/src/sdk/bundler/providers/index.ts
new file mode 100644
index 00000000..4b6685cc
--- /dev/null
+++ b/src/sdk/bundler/providers/index.ts
@@ -0,0 +1,2 @@
+export * from './GenericBundler';
+export * from './EtherspotBundler';
\ No newline at end of file
diff --git a/src/sdk/index.ts b/src/sdk/index.ts
index 9967fe6e..16f02391 100644
--- a/src/sdk/index.ts
+++ b/src/sdk/index.ts
@@ -8,6 +8,7 @@ export * from './interfaces';
 export * from './network';
 export * from './state';
 export * from './wallet';
+export * from './bundler';
 
 export { PrimeSdk, DataUtils };
 export default PrimeSdk;
\ No newline at end of file
diff --git a/src/sdk/interfaces.ts b/src/sdk/interfaces.ts
index 818c46b6..4ef7301f 100644
--- a/src/sdk/interfaces.ts
+++ b/src/sdk/interfaces.ts
@@ -1,3 +1,4 @@
+import { BundlerProviderLike } from './bundler';
 import { StateStorage } from './state';
 
 export interface PaymasterApi {
@@ -13,11 +14,12 @@ export enum Factory {
 
 export interface SdkOptions {
   chainId: number;
+  projectKey: string;
+  bundlerProvider?: BundlerProviderLike;
   stateStorage?: StateStorage;
-  bundlerRpcUrl?: string;
   rpcProviderUrl?: string;
   graphqlEndpoint?: string;
-  projectKey: string;
+  etherspotBundlerApiKey?: string;
   factoryWallet?: Factory;
   walletFactoryAddress?: string;
   entryPointAddress?: string;
diff --git a/src/sdk/network/constants.ts b/src/sdk/network/constants.ts
index 029e0cc1..82de3bbe 100644
--- a/src/sdk/network/constants.ts
+++ b/src/sdk/network/constants.ts
@@ -147,7 +147,7 @@ export const Networks: {
   },
   [10]: {
     chainId: 10,
-    bundler: 'https://optimism-bundler.etherspot.io',
+    bundler: 'https://rpc.etherspot.io/optimism',
     contracts: {
       entryPoint: '0x5FF137D4b0FDCD49DcA30c7CF57E578a026d2789',
       walletFactory: {
@@ -160,7 +160,7 @@ export const Networks: {
   },
   [137]: {
     chainId: 137,
-    bundler: 'https://polygon-bundler.etherspot.io',
+    bundler: 'https://rpc.etherspot.io/polygon',
     contracts: {
       entryPoint: '0x5FF137D4b0FDCD49DcA30c7CF57E578a026d2789',
       walletFactory: {
@@ -173,7 +173,7 @@ export const Networks: {
   },
   [42161]: {
     chainId: 42161,
-    bundler: 'https://arbitrum-bundler.etherspot.io',
+    bundler: 'https://rpc.etherspot.io/arbitrum',
     contracts: {
       entryPoint: '0x5FF137D4b0FDCD49DcA30c7CF57E578a026d2789',
       walletFactory: {
@@ -199,7 +199,7 @@ export const Networks: {
   },
   [1]: {
     chainId: 1,
-    bundler: 'https://ethereum-bundler.etherspot.io/',
+    bundler: 'https://rpc.etherspot.io/ethereum',
     contracts: {
       entryPoint: '0x5FF137D4b0FDCD49DcA30c7CF57E578a026d2789',
       walletFactory: {
@@ -238,7 +238,7 @@ export const Networks: {
   },
   [122]: {
     chainId: 122,
-    bundler: 'https://fuse-bundler.etherspot.io',
+    bundler: 'https://rpc.etherspot.io/fuse',
     contracts: {
       entryPoint: '0x5FF137D4b0FDCD49DcA30c7CF57E578a026d2789',
       walletFactory: {
@@ -251,7 +251,7 @@ export const Networks: {
   },
   [123]: {
     chainId: 123,
-    bundler: '',
+    bundler: 'https://fusetestnet-bundler.etherspot.io/',
     contracts: {
       entryPoint: '0x5FF137D4b0FDCD49DcA30c7CF57E578a026d2789',
       walletFactory: {
@@ -264,7 +264,7 @@ export const Networks: {
   },
   [100]: {
     chainId: 100,
-    bundler: 'https://gnosis-bundler.etherspot.io/',
+    bundler: 'https://rpc.etherspot.io/gnosis',
     contracts: {
       entryPoint: '0x5FF137D4b0FDCD49DcA30c7CF57E578a026d2789',
       walletFactory: {
@@ -329,7 +329,7 @@ export const Networks: {
   },
   [5000]: {
     chainId: 5000,
-    bundler: 'https://mantle-bundler.etherspot.io/',
+    bundler: 'https://rpc.etherspot.io/mantle',
     contracts: {
       entryPoint: '0x5FF137D4b0FDCD49DcA30c7CF57E578a026d2789',
       walletFactory: {
@@ -355,7 +355,7 @@ export const Networks: {
   },
   [43114]: {
     chainId: 43114,
-    bundler: 'https://avalanche-bundler.etherspot.io/',
+    bundler: 'https://rpc.etherspot.io/avalanche',
     contracts: {
       entryPoint: '0x5FF137D4b0FDCD49DcA30c7CF57E578a026d2789',
       walletFactory: {
@@ -368,7 +368,7 @@ export const Networks: {
   },
   [8453]: {
     chainId: 8453,
-    bundler: 'https://base-bundler.etherspot.io/',
+    bundler: 'https://rpc.etherspot.io/base',
     contracts: {
       entryPoint: '0x5FF137D4b0FDCD49DcA30c7CF57E578a026d2789',
       walletFactory: {
@@ -381,7 +381,7 @@ export const Networks: {
   },
   [56]: {
     chainId: 56,
-    bundler: 'https://bnb-bundler.etherspot.io/',
+    bundler: 'https://rpc.etherspot.io/bnb',
     contracts: {
       entryPoint: '0x5FF137D4b0FDCD49DcA30c7CF57E578a026d2789',
       walletFactory: {
@@ -420,7 +420,7 @@ export const Networks: {
   },
   [59144]: {
     chainId: 59144,
-    bundler: 'https://linea-bundler.etherspot.io/',
+    bundler: 'https://rpc.etherspot.io/linea',
     contracts: {
       entryPoint: '0x5FF137D4b0FDCD49DcA30c7CF57E578a026d2789',
       walletFactory: {
@@ -459,7 +459,7 @@ export const Networks: {
   },
   [14]: {
     chainId: 14,
-    bundler: 'https://flare-bundler.etherspot.io/',
+    bundler: 'https://rpc.etherspot.io/flare',
     contracts: {
       entryPoint: '0x5FF137D4b0FDCD49DcA30c7CF57E578a026d2789',
       walletFactory: {
@@ -485,7 +485,7 @@ export const Networks: {
   },
   [534352]: {
     chainId: 534352,
-    bundler: 'https://scroll-bundler.etherspot.io/',
+    bundler: 'https://rpc.etherspot.io/scroll',
     contracts: {
       entryPoint: '0x5FF137D4b0FDCD49DcA30c7CF57E578a026d2789',
       walletFactory: {
diff --git a/src/sdk/sdk.ts b/src/sdk/sdk.ts
index e012a208..dc46acbe 100644
--- a/src/sdk/sdk.ts
+++ b/src/sdk/sdk.ts
@@ -19,6 +19,7 @@ import { OnRamperDto, SignMessageDto, validateDto } from './dto';
 import { ZeroDevWalletAPI } from './base/ZeroDevWalletAPI';
 import { SimpleAccountAPI } from './base/SimpleAccountWalletAPI';
 import { ErrorHandler } from './errorHandler/errorHandler.service';
+import { EtherspotBundler } from './bundler';
 
 /**
  * Prime-Sdk
@@ -55,9 +56,8 @@ export class PrimeSdk {
     this.index = index ?? 0;
     const networkConfig = getNetworkConfig(chainId);
 
-    if (!optionsLike.bundlerRpcUrl) {
-      if (!networkConfig) throw new Exception('No bundler Rpc provided');
-      optionsLike.bundlerRpcUrl = networkConfig.bundler;
+    if (!optionsLike.bundlerProvider) {
+      optionsLike.bundlerProvider = new EtherspotBundler(chainId);
     }
 
     if (networkConfig) {
@@ -70,7 +70,7 @@ export class PrimeSdk {
 
     if (rpcProviderUrl) {
       provider = new providers.JsonRpcProvider(rpcProviderUrl);
-    } else provider = new providers.JsonRpcProvider(optionsLike.bundlerRpcUrl);
+    } else provider = new providers.JsonRpcProvider(optionsLike.bundlerProvider.url);
 
     let entryPointAddress = '', walletFactoryAddress = '';
     if (Networks[chainId]) {
@@ -115,7 +115,7 @@ export class PrimeSdk {
         index: this.index,
       })
     }
-    this.bundler = new HttpRpcClient(optionsLike.bundlerRpcUrl, entryPointAddress, chainId);
+    this.bundler = new HttpRpcClient(optionsLike.bundlerProvider.url, entryPointAddress, chainId);
 
   }