Claude Platform Docs

Create a Memory Store

$client->beta->memoryStores->create(string name, ?string description, ?array<string,string> metadata, ?list<AnthropicBeta> betas, ?string workspaceID): BetaManagedAgentsMemoryStore
POST/v1/memory_stores
Requires anthropic-beta: agent-memory-2026-07-22 or anthropic-beta: managed-agents-2026-04-01. How to send beta headers

Create a Memory Store

Parameters
name: string

The name of the memory store, 1 to 255 characters long, without control characters. Names don't have to be unique in a workspace.

In a session, the store's directory under /mnt/memory/ is based on this name. The name is lowercased and every run of characters other than ASCII letters and digits becomes one hyphen. The session's memory store resource gives the exact path in mount_path.

See the memory guide to learn more about how agents access memory stores.

description?: optional string

Free-text description of what the store contains, up to 1,024 characters. Included in the agent's system prompt when the store is attached, so word it to be useful to the agent.

metadata?: optional array<string,string>

Key-value pairs for your own use, such as the end user that the store belongs to. The agent doesn't see them.

A store has at most 16 pairs. Keys are 1 to 64 characters long and values at most 512 characters.

betas?: optional list<AnthropicBeta>⁠Header parameter

This endpoint is in beta: requests must send agent-memory-2026-07-22 or managed-agents-2026-04-01 in this header.

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 = 'memory_store'; $id; $archivedAt; /* 5 more */ }
"memory_store" type
string id

The unique ID of the memory store (memstore_...). Use it to attach the store to a session.

?\Datetime archivedAt

When the memory store was archived, in RFC 3339, or null if it hasn't been.

Archiving can't be undone. An archived store can't be attached to new sessions. You can't create or update its memories or update the store. You can still read and delete its memories, redact their versions, and delete the store.

See the memory guide to learn more about archiving.

\Datetime createdAt

When the memory store was created, in RFC 3339.

string description

Free-text description of what the store contains, up to 1,024 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

Key-value pairs for your own use, such as the end user that the store belongs to.

A store has at most 16 pairs. Keys are 1 to 64 characters long and values at most 512 characters. You can't filter lists by metadata.

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

When the memory store was last changed, in RFC 3339.

Changing its name, description, or metadata updates it. Archiving the store does too. Changes to the store's memories don't.

Create a Memory Store
<?php

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

use Anthropic\Client;
use Anthropic\Beta\AnthropicBeta;

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

$betaManagedAgentsMemoryStore = $client->beta->memoryStores->create(
  name: 'x',
  description: 'description',
  metadata: ['foo' => 'string'],
  betas: [AnthropicBeta::MESSAGE_BATCHES_2024_09_24],
  workspaceID: 'wrkspc_011CZkZaBF1tNoB5wlCeusgy',
);

var_dump($betaManagedAgentsMemoryStore);
Returns Examples
Response 200
{
  "id": "id",
  "archived_at": "2019-12-27T18:11:19.117Z",
  "created_at": "2019-12-27T18:11:19.117Z",
  "description": "description",
  "metadata": {
    "foo": "string"
  },
  "name": "name",
  "type": "memory_store",
  "updated_at": "2019-12-27T18:11:19.117Z"
}