diff --git a/contracts/hardhat.config.ts b/contracts/hardhat.config.ts
index 715a479db..0c1898086 100644
--- a/contracts/hardhat.config.ts
+++ b/contracts/hardhat.config.ts
@@ -6,6 +6,7 @@ import '@nomiclabs/hardhat-ethers'
 import 'hardhat-deploy';
 import '@nomiclabs/hardhat-etherscan';
 import '@nomicfoundation/hardhat-chai-matchers'
+import './tasks';
 
 import { HardhatUserConfig } from "hardhat/config";
 
diff --git a/contracts/package.json b/contracts/package.json
index 1f0c5b31e..619fa4219 100644
--- a/contracts/package.json
+++ b/contracts/package.json
@@ -19,6 +19,7 @@
     "etherscan:goerli": "yarn hardhat --network goerli etherscan-verify",
     "etherscan:base": "yarn hardhat --network base etherscan-verify",
     "etherscan:base_staging": "yarn hardhat --network base_staging etherscan-verify",
+    "genKeyUpdateCalldata": "npx hardhat genKeyUpdateCalldata",
     "importVerifier": "rm -rf ./contracts/verifiers/ && cp -r ../circuits-circom/contracts ./contracts/verifiers",
     "test": "npx hardhat test test/libs/*.ts test/processors/*.ts test/ramps/**/*.ts",
     "test:clean": "yarn build && yarn test",
diff --git a/contracts/tasks/genKeyUpdateCalldata.ts b/contracts/tasks/genKeyUpdateCalldata.ts
new file mode 100644
index 000000000..3e4575adc
--- /dev/null
+++ b/contracts/tasks/genKeyUpdateCalldata.ts
@@ -0,0 +1,67 @@
+import { task } from "hardhat/config";
+import { HardhatRuntimeEnvironment as HRE } from "hardhat/types";
+import * as readline from 'readline';
+
+import {
+  ManagedKeyHashAdapter__factory,
+  ManagedKeyHashAdapterV2__factory
+} from "../typechain/factories/contracts/processors/keyHashAdapters/index";
+import { PaymentProviders } from "../utils/types"
+
+task("genKeyUpdateCalldata", "Add a manufacturer to the ManufacturerRegistry")
+  .addParam("hash", "Hash of the modulus of the new domain key")
+  .setAction(async (taskArgs, hre: HRE) => {
+    // Generate the calldata for adding a new domain key to the ManagedKeyHashAdapter
+    const hash = taskArgs.hash;
+    const [ defaultAccount ] = await hre.getUnnamedAccounts();
+
+    // Allow script caller to select the payment provider they want to use
+    const paymentNetwork = await getPaymentNetwork();
+
+    let calldata;
+    if (paymentNetwork === "Venmo") {
+      calldata = ManagedKeyHashAdapter__factory.connect(
+        defaultAccount,
+        hre.ethers.provider
+      ).interface.encodeFunctionData("setMailserverKeyHash", [hash]);
+    } else {
+      calldata = ManagedKeyHashAdapterV2__factory.connect(
+        defaultAccount,
+        hre.ethers.provider
+      ).interface.encodeFunctionData("addMailServerKeyHash", [hash]);
+    }
+    
+    console.log(calldata);
+  });
+
+// A utility function to prompt the user for input
+async function getPaymentNetwork(): Promise<string> {
+  const rl = readline.createInterface({
+    input: process.stdin,
+    output: process.stdout
+  });
+
+  const paymentProviderList = Object.keys(PaymentProviders);
+
+  const baseQuestion = `Type the name of the payment provider you want to use: \n`;
+  const question = paymentProviderList.reduce((acc, curr) => {
+    return `${acc} - ${curr}\n`;
+  }, baseQuestion);
+  const paymentNetwork = await queryUser(rl, question);
+
+  if (!paymentProviderList.includes(paymentNetwork)) {
+    console.log("Invalid payment provider. Please try again.");
+    return await getPaymentNetwork();
+  }
+
+  return paymentNetwork;
+};
+
+// A utility function to prompt the user for input
+function queryUser(rl: readline.ReadLine, question: string): Promise<string> {
+  return new Promise(resolve => {
+    rl.question(question, (answer) => {
+      resolve(answer);
+    });
+  });
+};
diff --git a/contracts/tasks/index.ts b/contracts/tasks/index.ts
new file mode 100644
index 000000000..774fa25da
--- /dev/null
+++ b/contracts/tasks/index.ts
@@ -0,0 +1 @@
+export * from './genKeyUpdateCalldata';