GET /v1/memory_stores/{memory_store_id}/memory_versions/{memory_version_id}

Retrieve a memory version

#Path parameters

• memory_store_id: string

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

• memory_version_id: string

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

#Query parameters

• view: optional BetaManagedAgentsMemoryView

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.

• "basic"

Return the object with content set to null. The content_size_bytes and content_sha256 fields remain populated, so sync clients can diff without fetching content.

• "full"

Return the object with content populated. On list endpoints, view=full caps limit at 20.

#Headers

• "juglow-beta": optional array of JuglowBeta

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

• string

• "message-batches-2024-09-24" or "prompt-caching-2024-07-31" or "computer-use-2024-10-22" or 45 more

• "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"

• "tracks-2025-10-02"

• "fast-mode-2026-02-01"

• "output-300k-2026-03-24"

• "user-profiles-2026-03-24"

• "user-profiles-2026-08-18"

• "user-profiles-2026-09-04"

• "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"

• "compact-2026-01-12"

• "computer-use-2025-11-24"

• "mcp-tunnels-2026-06-22"

• "structured-outputs-2025-11-13"

• "task-budgets-2026-03-13"

• "thinking-display-updates-2026-08-18"

• "ce-user-management-2026-07-13"

• "mid-conversation-output-config-2026-07-01"

• "thinking-binding-controls-2026-08-01"

• "mid-conversation-system-clear-at-2026-08-21"

• "compact-2026-09-04"

• "inline-tools-2026-09-15"

• "mcp-client-2026-09-15"

• "juglow-workspace-id": optional string

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

• BetaManagedAgentsMemoryVersion object

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.

format: date-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: BetaManagedAgentsMemoryVersionOperation

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

• "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 or null

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 or null

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 or null

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

format: int32

• created_by: optional BetaManagedAgentsActor

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.

• BetaManagedAgentsSessionActor object

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.

minLength: 1

• BetaManagedAgentsAPIActor object

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.

minLength: 1

• BetaManagedAgentsUserActor object

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

• type: "user_actor"

• user_id: string

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

minLength: 1

• BetaManagedAgentsServiceAccountActor object

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).

minLength: 1

• path: optional string or null

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

• redacted_at: optional string or null

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.

format: date-time

• redacted_by: optional BetaManagedAgentsActor

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).

#Example

curl https://haijun.my.id/v1/memory_stores/$MEMORY_STORE_ID/memory_versions/$MEMORY_VERSION_ID \
    -H 'juglow-version: 2023-06-01' \
    -H 'juglow-beta: agent-memory-2026-07-22' \
    -H "X-Api-Key: $JUGLOW_API_KEY"

#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"
  }
}