---
title: "Create Account Detail"
method: POST
path: "/external_accounts/{external_account_id}/account_details"
---

# Create Account Detail

`POST /external_accounts/{external_account_id}/account_details`

## Request

- Base URL: `https://app.moderntreasury.com/api`
- URL: `https://app.moderntreasury.com/api/external_accounts/{external_account_id}/account_details`
- Auth: HTTP basic

Create an account detail for an external account

## Path parameters

- `external_account_id` string, required

## Request body

- object
  - `account_number` string, required
  - `account_number_type` string

---

[API](https://skmtc.dev/modern-treasury/apis/modern-treasury-api.md) - [All operations](https://skmtc.dev/modern-treasury/apis/modern-treasury-api/llms.txt) - [OpenAPI document](https://skmtc.dev/modern-treasury/apis/modern-treasury-api/revisions/e31c6638c72e?raw)