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: string

Path param: Path parameter memory_store_id

--memory-version-id: string

Path param: Path parameter memory_version_id

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

Query param: Query parameter for view

--beta: optional array of AnthropicBeta

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

Returns
beta_managed_agents_memory_version: object{ id, created_at, memory_id, 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.

id: string

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

created_at: string

A timestamp 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 a memory_version records. Every non-no-op mutation to a memory appends exactly one version row with one of these values.

One of the following:
"created"
"modified"
"deleted"
type: "memory_version"
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 { session_id, type } or BetaManagedAgentsAPIActor { api_key_id, type } or BetaManagedAgentsUserActor { type, user_id } or BetaManagedAgentsServiceAccountActor { service_account_id, type }

Identifies who performed a write or redact operation. Captured at write time on the memory_version row. The API key that created a session is not recorded on agent writes; attribution answers who made the write, not who is ultimately responsible. Look up session provenance separately via the Sessions API.

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

Attribution for a write made by an agent during a session, through the mounted filesystem at /mnt/memory/.

session_id: string

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

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

Attribution for a write made directly via the public API (outside of any session).

api_key_id: string

ID of the API key that performed the write. This identifies the key, not the secret.

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

Attribution for a write made by a human user through the Anthropic Console.

type: "user_actor"
user_id: string

ID of the user who performed the write (a user_... value).

minLength1
beta_managed_agents_service_account_actor: object{ service_account_id, type }

Attribution for a write made by a workload authenticated as a service account, for example via Workload Identity Federation.

service_account_id: string

ID of the service account that performed the write (a svac_... value).

minLength1
type: "service_account_actor"
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

A timestamp in RFC 3339 format

formatdate-time
redacted_by: optional BetaManagedAgentsSessionActor { session_id, type } or BetaManagedAgentsAPIActor { api_key_id, type } or BetaManagedAgentsUserActor { type, user_id } or BetaManagedAgentsServiceAccountActor { service_account_id, type }

Identifies who performed a write or redact operation. Captured at write time on the memory_version row. The API key that created a session is not recorded on agent writes; attribution answers who made the write, not who is ultimately responsible. Look up session provenance separately via the Sessions API.

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

Attribution for a write made by an agent during a session, through the mounted filesystem at /mnt/memory/.

session_id: string

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

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

Attribution for a write made directly via the public API (outside of any session).

api_key_id: string

ID of the API key that performed the write. This identifies the key, not the secret.

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

Attribution for a write made by a human user through the Anthropic Console.

type: "user_actor"
user_id: string

ID of the user who performed the write (a user_... value).

minLength1
beta_managed_agents_service_account_actor: object{ service_account_id, type }

Attribution for a write made by a workload authenticated as a service account, for example via Workload Identity Federation.

service_account_id: string

ID of the service account that performed the write (a svac_... value).

minLength1
type: "service_account_actor"

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
{
  "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"
  }
}
Returns Examples
{
  "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"
  }
}