---
title: "Create Contact Details"
method: POST
path: "/external_accounts/{external_account_id}/contact_details"
---

# Create Contact Details

`POST /external_accounts/{external_account_id}/contact_details`

## Request

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

Create an account detail for an external account

## Path parameters

- `external_account_id` string, required

## Request body

- object
  - `contact_identifier` string, required: The actual contact information.
  - `contact_identifier_type` string, required: See available types at [Contact Details](ref:contact-detail-object)

---

[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)