---
title: "Register a customer API bank connection"
method: POST
path: "/public/v2/bank-connections/"
tags: ["Bank Connections"]
---

# Register a customer API bank connection

`POST /public/v2/bank-connections/`

Register or upsert a customer-built bank connection and optional accounts under source_type=customer_api.

## Headers

- `Idempotency-Key` string

## Request body

- PublicBankConnectionRegisterSchemaIn
  - `connection_source_id` string, required
  - `institution_name` string, required
  - `accounts` PublicBankConnectionAccountSchemaIn[]
    - `account_id` string, required — Stable customer-supplied account key.
    - `account_name` string, required — Display name for the account.
    - `truncated_account_number` string, nullable
    - `currency_iso_4217_code` string, nullable

## Response `201`

Created

- PublicBankConnectionSchemaOut
  - `created_at` string, date-time, required — Date and time the record was created
  - `updated_at` string, date-time, required — Date and time the record was last updated
  - `id` integer, required
  - `connection_source_id` string, required
  - `institution_name` string, nullable
  - `status` string, required
  - `successfully_aggregated_at` string, date-time, nullable
  - `last_sync_at` string, date-time, nullable
  - `accounts` PublicBankConnectionAccountSchemaOut[]
    - `id` integer, required
    - `account_id` string, required
    - `account_name` string, required
    - `truncated_account_number` string, nullable
    - `currency_iso_4217_code` string, nullable
    - `status` string, required

## Other responses

- `400` — Bad Request
- `422` — Unprocessable Content

## Changes

- **2026-08-28** `48edcb3acb74` — 2 info
  - added the required property `created_at` to the response with the `201` status
  - added the required property `updated_at` to the response with the `201` status
- **2026-08-19** `f338ec8b3f52` — 1 info
  - endpoint added

[Change history](https://skmtc.dev/dualentry/apis/dualentry-public-api/changes/public/v2/bank-connections/post.md)

---

[API](https://skmtc.dev/dualentry/apis/dualentry-public-api.md) · [All operations](https://skmtc.dev/dualentry/apis/dualentry-public-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/dualentry/dualentry-public-api/revisions/48edcb3acb74/schema)