Kernel Account API

The Kernel Account API powers Patch wallets and controls the EIP-4337 account abstraction smart contract wallets called, Kernel Accounts.

Kernel Accounts are a simple smart contract wallet with the same address on all EVM chains and connected to a user's email, social account, phone, or an app provider. The Kernel Account API can be used to submit a transaction or sign a message through a target wallet.

Submit a Transaction

To send a transaction through a Kernel Account, see the Kernel Tx endpoint in Postman.

var myHeaders = new Headers();
myHeaders.append("Content-Type", "application/json");
myHeaders.append("Authorization", "Bearer {{access_token}}");

var raw = JSON.stringify({
  "userId": "test:elonmusk",
  "chain": "matic",
  "to": [
  "value": [
  "data": [
  "delegatecall": 0, // Optional parameter. Set to 1 for a delegatecall().
  "auth": ""

var requestOptions = {
  method: 'POST',
  headers: myHeaders,
  body: raw,
  redirect: 'follow'

fetch("", requestOptions)
  .then(response => response.text())
  .then(result => console.log(result))
  .catch(error => console.log('error', error));

Sign a Message

Sign any arbitrary message using an EIP-1271 signature from your Patch wallet. Commonly used to sign into an application, submit a trade, or list an NFT on a marketplace.

var request = require('request');
var options = {
  'method': 'POST',
  'url': '',
  'headers': {
    'Content-Type': 'application/json',
    'Authorization': 'Bearer {{access_token}}'
  body: JSON.stringify({
    "userId": "test:elonmusk",
    "hash": "0xec3608877ecbf8084c29896b7eab2a368b2b3c8d003288584d145613dfa4706c"

request(options, function (error, response) {
  if (error) throw new Error(error);

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