---
title: "Register Account Number"
method: POST
path: "/v1/financial_accounts/{financial_account_token}/register_account_number"
tags: ["Financial Account"]
---

# Register Account Number

`POST /v1/financial_accounts/{financial_account_token}/register_account_number`

## Request

- Base URL: `https://sandbox.lithic.com`
- URL: `https://sandbox.lithic.com/v1/financial_accounts/{financial_account_token}/register_account_number`
- Auth: API key in header `Authorization`

Register account number

## Path parameters

- `financial_account_token` string, uuid, required

## Request body

- RegisterAccountNumberRequest
  - `account_number` string, required

## Response `200`

OK

## Other responses

- `400`: A parameter in the query given in the request does not match the valid queries for the endpoint.
- `401`: | | | |---|---| | User has not been authenticated | Invalid or missing API key | | API key is not active | The API key used is no longer active | | Could not find API key | The API key provided is not associated with any user | | Please provide API key in Authorization header | The Authorization header is not in the request | | Please provide API key in the form Authorization: [api-key] | The Authorization header is not formatted properly | | Insufficient privileges. Issuing API key required | Write access requires an Issuing API key. Reach out at [lithic.com/contact](https://lithic.com/contact) | | Insufficient privileges to create virtual cards. | Creating virtual cards requires an additional privilege | Reach out at [lithic.com/contact](https://lithic.com/contact) |
- `404`: The specified resource was not found.
- `422`: Unprocessable entity.
- `429`: Client has exceeded the number of allowed requests in a given time period. | | | |---|---| | Rate limited, too many requests per second | User has exceeded their per second rate limit | | Rate limited, reached daily limit | User has exceeded their daily rate limit | | Rate limited, too many keys tried | One IP has queried too many different API keys |

---

[API](https://skmtc.dev/lithic-com/apis/lithic-developer-api.md) - [All operations](https://skmtc.dev/lithic-com/apis/lithic-developer-api/llms.txt) - [OpenAPI document](https://skmtc.dev/lithic-com/apis/lithic-developer-api/revisions/17d2fbc28992?raw)