---
title: "Add a new account address for authentication"
method: POST
path: "/api/v1/eoa-accounts"
tags: ["Account Management"]
---

# Add a new account address for authentication

`POST /api/v1/eoa-accounts`

Registers a new authenticated account address for the authenticated user.
This address can be used to sign in via SIWE and to start new API sessions.

## Request body

- object
  - `address` string — The Ethereum address of the new externally owned account.

## Response `201`

Successfully created EOA account.

- EOAAccount
  - `id` string
  - `address` string
  - `userId` string
  - `createdAt` string, date-time

## Other responses

- `400` — Invalid request body or address format.
- `401` — Unauthorized, missing or invalid token.
- `500` — Internal server error.

---

[API](https://skmtc.net/gnosispay/apis/gnosispay-api.md) · [All operations](https://skmtc.net/gnosispay/apis/gnosispay-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/gnosispay/gnosispay-api/versions/e0a09962c187/schema)