---
title: "Manage pooled account members"
method: POST
path: "/v0/bank/accounts/{bank-account-id}/membership-updates"
tags: ["Pooled account membership"]
---

# Manage pooled account members

`POST /v0/bank/accounts/{bank-account-id}/membership-updates`

## Request

- Base URL: `https://api.griffin.com`
- URL: `https://api.griffin.com/v0/bank/accounts/{bank-account-id}/membership-updates`
- Auth: API key in header `Authorization`

Add and update the legal persons in a pooled account membership. Limited to 1000 legal persons per operation.

## Path parameters

- `bank-account-id` string, required

## Request body

- object
  - `additions` union[], required
    - union: A contextual link to the [legal person](#tag/Legal-persons).
      - string
      - string
  - `deletions` union[], required
    - union: A contextual link to the [legal person](#tag/Legal-persons).
      - string
      - string

## Response `200`

OK

- object
  - `pooled-account-memberships-url` union, required: Link to the list of [pool members](#tag/Pooled-account-membership) associated with this account.
    - string
    - string

## Other responses

- `400`: Responds with bad-request if the body does not conform to the schema.
- `401`: Requires an API key to continue
- `403`: Forbidden
- `404`: Not Found
- `422`: Unprocessable Entity

## Changes

- **2026-09-19** `3e69d9e24ef6`: 1 info
  - api operation id `post-bank-accounts-bank-account-id-membership-updates` was added

[Operation history](https://skmtc.dev/griffin/apis/the-griffin-api/changes/v0/bank/accounts/:bank-account-id/membership-updates/post.md)

---

[API](https://skmtc.dev/griffin/apis/the-griffin-api.md) - [All operations](https://skmtc.dev/griffin/apis/the-griffin-api/llms.txt) - [OpenAPI document](https://skmtc.dev/griffin/apis/the-griffin-api/revisions/9e4c303c70a5?raw)