# Depository (single)

A depository represents the place where instruments are held — a
custody account at a bank or broker. Owned by exactly one legal
entity. Linked to one or more accounts (a many-to-many relationship);
transactions on those accounts can update positions held in the
depository.

## Endpoints

GET /v2/depositories/:id
  Fetch one depository.

PATCH /v2/depositories/:id
  Update mutable attributes (`name`, `externalIdentifier`).

DELETE /v2/depositories/:id
  Delete the depository. Rejected if any holding or transaction
  history still references it.

## Path params

  id (required) — Depository identifier (Mongo ObjectID).

## Attributes (`type: depository`)

  name               (string, optional) — Display name.
  externalIdentifier (string, required) — Bank/custodian-assigned identifier.

## Relationships

  legalEntity — Owner (read-only here).
  accounts    — Linked accounts (read-only here).