Create a memory store

POST/v1/memory_stores

Headers

"anthropic-beta": optional array of AnthropicBeta

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

One of the following:

string

"message-batches-2024-09-24" or "prompt-caching-2024-07-31" or "computer-use-2024-10-22" or 31 more

One of the following:

"message-batches-2024-09-24"

"prompt-caching-2024-07-31"

"computer-use-2024-10-22"

"computer-use-2025-01-24"

"pdfs-2024-09-25"

"token-counting-2024-11-01"

"token-efficient-tools-2025-02-19"

"output-128k-2025-02-19"

"files-api-2025-04-14"

"mcp-client-2025-04-04"

"mcp-client-2025-11-20"

"dev-full-thinking-2025-05-14"

"interleaved-thinking-2025-05-14"

"code-execution-2025-05-22"

"extended-cache-ttl-2025-04-11"

"context-1m-2025-08-07"

"context-management-2025-06-27"

"model-context-window-exceeded-2025-08-26"

"skills-2025-10-02"

"fast-mode-2026-02-01"

"output-300k-2026-03-24"

"user-profiles-2026-03-24"

"user-profiles-2026-08-18"

"advisor-tool-2026-03-01"

"managed-agents-2026-04-01"

"cache-diagnosis-2026-04-07"

"dreaming-2026-04-21"

"thinking-token-count-2026-05-13"

"server-side-fallback-2026-06-01"

"server-side-fallback-2026-07-01"

"fallback-credit-2026-06-01"

"fallback-credit-2026-07-01"

"agent-memory-2026-07-22"

"mid-conversation-tool-changes-2026-07-01"

Body

name: string

Human-readable name for the store. Required; 1–255 characters; no control characters. The mount-path slug under /mnt/memory/ is derived from this name (lowercased, non-alphanumeric runs collapsed to a hyphen). Names need not be unique within a workspace.

minLength1

maxLength255

description: optional string

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.

maxLength1024

metadata: optional map[string]

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. Not visible to the agent.

Returns

BetaManagedAgentsMemoryStore object{ id, created_at, name, 5 more }

A memory_store: a named container for agent memories, scoped to a workspace. Attach a store to a session via resources[] to mount it as a directory the agent can read and write.

id: string

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.

created_at: string

A timestamp in RFC 3339 format

formatdate-time

name: string

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

type: "memory_store"

updated_at: string

A timestamp in RFC 3339 format

formatdate-time

archived_at: optional string or null

A timestamp in RFC 3339 format

formatdate-time

description: optional string

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.

metadata: optional map[string]

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.

Create a memory store

curl https://api.anthropic.com/v1/memory_stores \
    -H 'Content-Type: application/json' \
    -H 'anthropic-version: 2023-06-01' \
    -H 'anthropic-beta: agent-memory-2026-07-22' \
    -H "X-Api-Key: $ANTHROPIC_API_KEY" \
    -d '{
          "name": "x"
        }'

{
  "id": "id",
  "created_at": "2019-12-27T18:11:19.117Z",
  "name": "name",
  "type": "memory_store",
  "updated_at": "2019-12-27T18:11:19.117Z",
  "archived_at": "2019-12-27T18:11:19.117Z",
  "description": "description",
  "metadata": {
    "foo": "string"
  }
}

Returns Examples

{
  "id": "id",
  "created_at": "2019-12-27T18:11:19.117Z",
  "name": "name",
  "type": "memory_store",
  "updated_at": "2019-12-27T18:11:19.117Z",
  "archived_at": "2019-12-27T18:11:19.117Z",
  "description": "description",
  "metadata": {
    "foo": "string"
  }
}