# Custom Signer Integration (/sdk/v5_3_x/signers/custom-signer)

> For the complete documentation index, see [llms.txt](/llms.txt)



<VersionWarning version="5.3.x" />

ZeroDev offers the flexibility to integrate various types of signers, catering to diverse application requirements.

## Using Externally Owned Accounts (EOAs) [#using-externally-owned-accounts-eoas]

Most commonly used signers are Externally Owned Accounts (EOAs). If you're using a signer that falls under this category and isn't explicitly covered in our documentation, we recommend visiting our dedicated [EOA integration section](/sdk/v5_3_x/signers/eoa). This section provides detailed guidance on integrating EOAs with ZeroDev.

## Implementing Custom Signers [#implementing-custom-signers]

If your requirements extend beyond standard EOAs, ZeroDev supports the integration of custom signers. Our signers conform to the `SmartAccountSigner` interface defined in permissionless.js. For developers looking to implement a custom solution, you can reference the `SmartAccountSigner` interface on their [GitHub repository](https://github.com/pimlicolabs/permissionless.js/blob/0b1cf0086b3fa131415a6a9bf398852c159fc181/packages/permissionless/accounts/types.ts#L60). This interface provides the necessary structure and guidelines to ensure compatibility with ZeroDev.

One easy way to implement a `SmartAccountSigner` is to implement Viem's account type, [by following this guide](https://viem.sh/docs/accounts/custom).

Once you've implemented the signer, you should be able to [use it with a validator](/sdk/v5_3_x/core-api/create-account#creating-a-ecdsa-validator).