Claude Platform Docs

List memory stores

$client->beta->memoryStores->list(?\Datetime createdAtGte, ?\Datetime createdAtLte, ?bool includeArchived, ?int limit, ?string page, ?list<AnthropicBeta> betas, ?string workspaceID): PageCursor<BetaManagedAgentsMemoryStore>
GET/v1/memory_stores

List memory stores

Parameters
createdAtGte?:optional \Datetime⁠Query parameter

Return only stores whose created_at is at or after this time (inclusive). Sent on the wire as created_at[gte].

createdAtLte?:optional \Datetime⁠Query parameter

Return only stores whose created_at is at or before this time (inclusive). Sent on the wire as created_at[lte].

includeArchived?:optional bool⁠Query parameter

When true, archived stores are included in the results. Defaults to false (archived stores are excluded).

limit?:optional int⁠Query parameter

Maximum number of stores to return per page. Must be between 1 and 100. Defaults to 20 when omitted.

page?:optional string⁠Query parameter

Opaque pagination cursor (a page_... value). Pass the next_page value from a previous response to fetch the next page; omit for the first page.

betas?:optional list<AnthropicBeta>⁠Header parameter

Optional header to specify the beta version(s) you want to use.

workspaceID?:optional string⁠Header parameter

Optional header to select the Workspace for this request. The value is a Workspace ID (for example, wrkspc_011CZkZaBF1tNoB5wlCeusgy).

Only needed for credentials that can act on more than one Workspace. A credential that belongs to a specific Workspace may omit it; if sent, it must match that Workspace.

Returns
class BetaManagedAgentsMemoryStore { $type; $id; $archivedAt; /* 5 more */ }
Type type
string id

Unique identifier for the memory store (a memstore_... tagged ID). Use this when attaching the store to a session, or in the {memory_store_id} path parameter of subsequent calls.

?\Datetime archivedAt

Timestamp when the store was archived, or null if active. Set once and never cleared; archiving is one-way. Archived stores are read-only and cannot be attached to new sessions.

\Datetime createdAt

Timestamp when the store was created.

string description

Free-text description of what the store contains, up to 1024 characters. Included in the agent's system prompt when the store is attached, so word it to be useful to the agent. Empty string when unset.

array<string,string> metadata

Arbitrary key-value tags for your own bookkeeping (such as the end user a store belongs to). Up to 16 pairs; keys 1–64 characters; values up to 512 characters. Returned on retrieve/list but not filterable.

string name

Human-readable name for the store. 1–255 characters. The store's mount-path slug under /mnt/memory/ is derived from this name.

\Datetime updatedAt

Timestamp when the store's name, description, or metadata was last modified. Memory writes inside the store do not advance this.

List memory stores
<?php

require_once dirname(__DIR__) . '/vendor/autoload.php';

$client = new Client(apiKey: 'my-anthropic-api-key');

$page = $client->beta->memoryStores->list(
  createdAtGte: new \DateTimeImmutable('2019-12-27T18:11:19.117Z'),
  createdAtLte: new \DateTimeImmutable('2019-12-27T18:11:19.117Z'),
  includeArchived: true,
  limit: 0,
  page: 'page',
  betas: [AnthropicBeta::MESSAGE_BATCHES_2024_09_24],
  workspaceID: 'wrkspc_011CZkZaBF1tNoB5wlCeusgy',
);

var_dump($page);
Returns Examples
Response 200
{
  "data": [
    {
      "id": "memstore_01Wf3kQ8tZxB2mVr7HcJ4aNd",
      "archived_at": null,
      "created_at": "2026-03-15T10:00:00Z",
      "description": "Per-user preferences and project context.",
      "metadata": {},
      "name": "User Preferences",
      "type": "memory_store",
      "updated_at": "2026-03-15T10:00:00Z"
    }
  ],
  "next_page": "page_MjAyNS0wNS0xNFQwMDowMDowMFo="
}