Claude Platform Docs

Retrieve a memory version

$ ant beta:memory-stores:memory-versions retrieve
GET/v1/memory_stores/{memory_store_id}/memory_versions/{memory_version_id}

Retrieve a memory version

Parameters
--memory-store-id: string⁠Path parameter

The ID of the memory store that holds the version (memstore_...).

--memory-version-id: string⁠Path parameter

The ID of the memory version to retrieve (memver_...).

--view: optional "basic" or "full"⁠Query parameter

Selects which projection of a memory or memory_version the server returns. basic returns the object with content set to null; full populates content. When omitted, the default is endpoint-specific: retrieve operations default to full; list, create, and update operations default to basic. Listing with view=full caps limit at 20.

--beta: optional array of AnthropicBeta⁠Header parameter

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

--workspace-id: 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
beta_managed_agents_memory_version: object{ type: "memory_version", id, created_at, 10 more }

A memory_version object: one immutable, attributed row in a memory's append-only history. Every non-no-op mutation to a memory produces a new version. Versions belong to the store (not the individual memory) and are not deleted with the memory; each version is retained for at least the version retention period after it was written, unless the store itself is deleted. Retrieving a redacted version returns 200 with content, path, content_size_bytes, and content_sha256 set to null; branch on redacted_at, not HTTP status.

type: "memory_version"
id: string

Unique identifier for this version (a memver_... value).

created_at: string

When this version was written, in RFC 3339 format.

formatdate-time
memory_id: string

ID of the memory this version snapshots (a mem_... value). Remains valid after the memory is deleted; pass it as memory_id to List memory versions to retrieve the memory's retained versions, including the deleted row while the lineage is retained.

memory_store_id: string

ID of the memory store this version belongs to (a memstore_... value).

operation: "created" or "modified" or "deleted"

The kind of mutation this version records: created, modified, or deleted.

One of the following:
"created"

The memory was created. The first version in any memory's lineage.

"modified"

The memory's content, path, or both were changed via update. Writes the agent makes through the filesystem mount also appear as modified.

"deleted"

The memory was deleted. The content, content_size_bytes, and content_sha256 fields are null on this version. The preceding version, while it is retained, records the deleted content's size and hash.

content: optional string

The memory's UTF-8 text content as of this version. null when view=basic, when operation is deleted, or when redacted_at is set.

content_sha256: optional string

Lowercase hex SHA-256 digest of content as of this version (64 characters). null when redacted_at is set or operation is deleted. Populated regardless of view otherwise.

content_size_bytes: optional number

Size of content in bytes as of this version. null when redacted_at is set or operation is deleted. Populated regardless of view otherwise.

formatint32
created_by: optional BetaManagedAgentsSessionActor or BetaManagedAgentsAPIActor or BetaManagedAgentsUserActor or BetaManagedAgentsServiceAccountActor

Who performed this write: one of session_actor, api_actor, user_actor, or service_account_actor; null when no writer is recorded. Captured at write time and preserved through redaction. A session_actor is an agent writing through the store's mounted filesystem at /mnt/memory/. The API key that created that session is not recorded on agent writes, so attribution names who made the write, not who is ultimately responsible; look up session provenance via the Sessions API.

One of the following:
beta_managed_agents_session_actor: object{ type: "session_actor", session_id }

An agent acting during a session, for example through the session's mounted filesystem. It names the session itself, not the user or API key that started the session.

type: "session_actor"
session_id: string

ID of the session (a sesn_... value). Look up the session via Retrieve a session for further provenance.

minLength1
beta_managed_agents_api_actor: object{ type: "api_actor", api_key_id }

A direct caller of the public API, identified by the API key that authenticated the request.

type: "api_actor"
api_key_id: string

ID of the API key (an apikey_... value). This identifies the key, not the secret.

minLength1
beta_managed_agents_user_actor: object{ type: "user_actor", user_id }

A human user, for example acting through the Anthropic Console.

type: "user_actor"
user_id: string

ID of the user (a user_... value).

minLength1
beta_managed_agents_service_account_actor: object{ type: "service_account_actor", service_account_id }

A workload authenticated as a service account, for example via Workload Identity Federation.

type: "service_account_actor"
service_account_id: string

ID of the service account (a svac_... value).

minLength1
path: optional string

The memory's path at the time of this write. null if and only if redacted_at is set.

redacted_at: optional string

When this version was redacted, in RFC 3339 format, or null if it has not been redacted. When set, content, path, content_size_bytes, and content_sha256 are all null. See Redact a memory version.

formatdate-time
redacted_by: optional BetaManagedAgentsSessionActor or BetaManagedAgentsAPIActor or BetaManagedAgentsUserActor or BetaManagedAgentsServiceAccountActor

Who redacted this version, or null if it has not been redacted. In practice always an api_actor, user_actor, or service_account_actor (agents do not have a redact capability).

One of the following:
beta_managed_agents_session_actor: object{ type: "session_actor", session_id }

An agent acting during a session, for example through the session's mounted filesystem. It names the session itself, not the user or API key that started the session.

type: "session_actor"
session_id: string

ID of the session (a sesn_... value). Look up the session via Retrieve a session for further provenance.

minLength1
beta_managed_agents_api_actor: object{ type: "api_actor", api_key_id }

A direct caller of the public API, identified by the API key that authenticated the request.

type: "api_actor"
api_key_id: string

ID of the API key (an apikey_... value). This identifies the key, not the secret.

minLength1
beta_managed_agents_user_actor: object{ type: "user_actor", user_id }

A human user, for example acting through the Anthropic Console.

type: "user_actor"
user_id: string

ID of the user (a user_... value).

minLength1
beta_managed_agents_service_account_actor: object{ type: "service_account_actor", service_account_id }

A workload authenticated as a service account, for example via Workload Identity Federation.

type: "service_account_actor"
service_account_id: string

ID of the service account (a svac_... value).

minLength1
Retrieve a memory version
ant beta:memory-stores:memory-versions retrieve \
  --api-key my-anthropic-api-key \
  --memory-store-id memory_store_id \
  --memory-version-id memory_version_id
Returns Examples
Response 200
{
  "id": "id",
  "created_at": "2019-12-27T18:11:19.117Z",
  "memory_id": "memory_id",
  "memory_store_id": "memory_store_id",
  "operation": "created",
  "type": "memory_version",
  "content": "content",
  "content_sha256": "content_sha256",
  "content_size_bytes": 0,
  "created_by": {
    "session_id": "x",
    "type": "session_actor"
  },
  "path": "path",
  "redacted_at": "2019-12-27T18:11:19.117Z",
  "redacted_by": {
    "session_id": "x",
    "type": "session_actor"
  }
}