--- title: Retrieve a memory version url: https://platform.claude.com/docs/en/api/go/beta/memory_stores/memory_versions/retrieve --- # Retrieve a memory version `client.Beta.MemoryStores.MemoryVersions.Get(ctx, memoryVersionID, params) (*BetaManagedAgentsMemoryVersion, error)` **GET** `/v1/memory_stores/{memory_store_id}/memory_versions/{memory_version_id}` Retrieve a memory version ## Parameters - `memoryVersionID string` (path parameter) The ID of the memory version to retrieve (`memver_...`). - `params BetaMemoryStoreMemoryVersionGetParams` - `MemoryStoreID string` (path parameter) The ID of the memory store that holds the version (`memstore_...`). - `View BetaManagedAgentsMemoryView Optional` (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. - `Betas []AnthropicBeta Optional` (header parameter) This endpoint is in beta: requests must send `agent-memory-2026-07-22` or `managed-agents-2026-04-01` in this header. - `const AnthropicBetaMessageBatches2024_09_24 AnthropicBeta = "message-batches-2024-09-24"` - `const AnthropicBetaPromptCaching2024_07_31 AnthropicBeta = "prompt-caching-2024-07-31"` - `const AnthropicBetaComputerUse2024_10_22 AnthropicBeta = "computer-use-2024-10-22"` - `const AnthropicBetaComputerUse2025_01_24 AnthropicBeta = "computer-use-2025-01-24"` - `const AnthropicBetaPDFs2024_09_25 AnthropicBeta = "pdfs-2024-09-25"` - `const AnthropicBetaTokenCounting2024_11_01 AnthropicBeta = "token-counting-2024-11-01"` - `const AnthropicBetaTokenEfficientTools2025_02_19 AnthropicBeta = "token-efficient-tools-2025-02-19"` - `const AnthropicBetaOutput128k2025_02_19 AnthropicBeta = "output-128k-2025-02-19"` - `const AnthropicBetaFilesAPI2025_04_14 AnthropicBeta = "files-api-2025-04-14"` - `const AnthropicBetaMCPClient2025_04_04 AnthropicBeta = "mcp-client-2025-04-04"` - `const AnthropicBetaMCPClient2025_11_20 AnthropicBeta = "mcp-client-2025-11-20"` - `const AnthropicBetaDevFullThinking2025_05_14 AnthropicBeta = "dev-full-thinking-2025-05-14"` - `const AnthropicBetaInterleavedThinking2025_05_14 AnthropicBeta = "interleaved-thinking-2025-05-14"` - `const AnthropicBetaCodeExecution2025_05_22 AnthropicBeta = "code-execution-2025-05-22"` - `const AnthropicBetaExtendedCacheTTL2025_04_11 AnthropicBeta = "extended-cache-ttl-2025-04-11"` - `const AnthropicBetaContext1m2025_08_07 AnthropicBeta = "context-1m-2025-08-07"` - `const AnthropicBetaContextManagement2025_06_27 AnthropicBeta = "context-management-2025-06-27"` - `const AnthropicBetaModelContextWindowExceeded2025_08_26 AnthropicBeta = "model-context-window-exceeded-2025-08-26"` - `const AnthropicBetaSkills2025_10_02 AnthropicBeta = "skills-2025-10-02"` - `const AnthropicBetaFastMode2026_02_01 AnthropicBeta = "fast-mode-2026-02-01"` - `const AnthropicBetaOutput300k2026_03_24 AnthropicBeta = "output-300k-2026-03-24"` - `const AnthropicBetaUserProfiles2026_03_24 AnthropicBeta = "user-profiles-2026-03-24"` - `const AnthropicBetaUserProfiles2026_08_18 AnthropicBeta = "user-profiles-2026-08-18"` - `const AnthropicBetaUserProfiles2026_09_04 AnthropicBeta = "user-profiles-2026-09-04"` - `const AnthropicBetaAdvisorTool2026_03_01 AnthropicBeta = "advisor-tool-2026-03-01"` - `const AnthropicBetaManagedAgents2026_04_01 AnthropicBeta = "managed-agents-2026-04-01"` - `const AnthropicBetaCacheDiagnosis2026_04_07 AnthropicBeta = "cache-diagnosis-2026-04-07"` - `const AnthropicBetaDreaming2026_04_21 AnthropicBeta = "dreaming-2026-04-21"` - `const AnthropicBetaThinkingTokenCount2026_05_13 AnthropicBeta = "thinking-token-count-2026-05-13"` - `const AnthropicBetaServerSideFallback2026_06_01 AnthropicBeta = "server-side-fallback-2026-06-01"` - `const AnthropicBetaServerSideFallback2026_07_01 AnthropicBeta = "server-side-fallback-2026-07-01"` - `const AnthropicBetaFallbackCredit2026_06_01 AnthropicBeta = "fallback-credit-2026-06-01"` - `const AnthropicBetaFallbackCredit2026_07_01 AnthropicBeta = "fallback-credit-2026-07-01"` - `const AnthropicBetaAgentMemory2026_07_22 AnthropicBeta = "agent-memory-2026-07-22"` - `const AnthropicBetaMidConversationToolChanges2026_07_01 AnthropicBeta = "mid-conversation-tool-changes-2026-07-01"` - `const AnthropicBetaCompact2026_01_12 AnthropicBeta = "compact-2026-01-12"` - `const AnthropicBetaComputerUse2025_11_24 AnthropicBeta = "computer-use-2025-11-24"` - `const AnthropicBetaMCPTunnels2026_06_22 AnthropicBeta = "mcp-tunnels-2026-06-22"` - `const AnthropicBetaStructuredOutputs2025_11_13 AnthropicBeta = "structured-outputs-2025-11-13"` - `const AnthropicBetaTaskBudgets2026_03_13 AnthropicBeta = "task-budgets-2026-03-13"` - `const AnthropicBetaThinkingDisplayUpdates2026_08_18 AnthropicBeta = "thinking-display-updates-2026-08-18"` - `const AnthropicBetaCEUserManagement2026_07_13 AnthropicBeta = "ce-user-management-2026-07-13"` - `const AnthropicBetaMidConversationOutputConfig2026_07_01 AnthropicBeta = "mid-conversation-output-config-2026-07-01"` - `const AnthropicBetaThinkingBindingControls2026_08_01 AnthropicBeta = "thinking-binding-controls-2026-08-01"` - `const AnthropicBetaMidConversationSystemClearAt2026_08_21 AnthropicBeta = "mid-conversation-system-clear-at-2026-08-21"` - `const AnthropicBetaCompact2026_09_04 AnthropicBeta = "compact-2026-09-04"` - `const AnthropicBetaInlineTools2026_09_15 AnthropicBeta = "inline-tools-2026-09-15"` - `const AnthropicBetaMCPClient2026_09_15 AnthropicBeta = "mcp-client-2026-09-15"` - `const AnthropicBetaCEPlugins2026_09_01 AnthropicBeta = "ce-plugins-2026-09-01"` - `const AnthropicBetaSpendLimitReads2026_09_26 AnthropicBeta = "spend-limit-reads-2026-09-26"` - `const AnthropicBetaTelemetryDestinations2026_08_11 AnthropicBeta = "telemetry-destinations-2026-08-11"` - `WorkspaceID param.Opt[string] Optional` (header 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 - `type BetaManagedAgentsMemoryVersion` 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 BetaManagedAgentsMemoryVersionType` - `ID string` Unique identifier for this version (a `memver_...` value). - `CreatedAt Time` When this version was written, in RFC 3339 format. format: date-time - `MemoryID 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](https://platform.claude.com/docs/en/api/beta/memory_stores/memory_versions/list?sdk_languages=go) to retrieve the memory's retained versions, including the `deleted` row while the lineage is retained. - `MemoryStoreID 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`. - `const BetaManagedAgentsMemoryVersionOperationCreated BetaManagedAgentsMemoryVersionOperation = "created"` The memory was created. The first version in any memory's lineage. - `const BetaManagedAgentsMemoryVersionOperationModified BetaManagedAgentsMemoryVersionOperation = "modified"` The memory's `content`, `path`, or both were changed via update. Writes the agent makes through the filesystem mount also appear as `modified`. - `const BetaManagedAgentsMemoryVersionOperationDeleted BetaManagedAgentsMemoryVersionOperation = "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 string Optional` 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. - `ContentSha256 string Optional` 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. - `ContentSizeBytes int64 Optional` 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 - `CreatedBy BetaManagedAgentsActorUnion Optional` 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](https://platform.claude.com/docs/en/api/beta/sessions/retrieve?sdk_languages=go). - `type BetaManagedAgentsSessionActor` 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 BetaManagedAgentsSessionActorType` - `SessionID string` ID of the session (a `sesn_...` value). Look up the session via [Retrieve a session](https://platform.claude.com/docs/en/api/beta/sessions/retrieve?sdk_languages=go) for further provenance. minLength: 1 - `type BetaManagedAgentsAPIActor` A direct caller of the public API, identified by the API key that authenticated the request. - `Type BetaManagedAgentsAPIActorType` - `APIKeyID string` ID of the API key (an `apikey_...` value). This identifies the key, not the secret. minLength: 1 - `type BetaManagedAgentsUserActor` A human user, for example acting through the Anthropic Console. - `Type BetaManagedAgentsUserActorType` - `UserID string` ID of the user (a `user_...` value). minLength: 1 - `type BetaManagedAgentsServiceAccountActor` A workload authenticated as a service account, for example via Workload Identity Federation. - `Type ServiceAccountActor` - `ServiceAccountID string` ID of the service account (a `svac_...` value). minLength: 1 - `Path string Optional` The memory's path at the time of this write. `null` if and only if `redacted_at` is set. - `RedactedAt Time Optional` 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](https://platform.claude.com/docs/en/api/beta/memory_stores/memory_versions/redact?sdk_languages=go). format: date-time - `RedactedBy BetaManagedAgentsActorUnion Optional` 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 ```go package main import ( "context" "fmt" "github.com/anthropics/anthropic-sdk-go" "github.com/anthropics/anthropic-sdk-go/option" ) func main() { client := anthropic.NewClient( option.WithAPIKey("my-anthropic-api-key"), ) betaManagedAgentsMemoryVersion, err := client.Beta.MemoryStores.MemoryVersions.Get( context.TODO(), "memory_version_id", anthropic.BetaMemoryStoreMemoryVersionGetParams{ MemoryStoreID: "memory_store_id", }, ) if err != nil { panic(err.Error()) } fmt.Printf("%+v\n", betaManagedAgentsMemoryVersion.ID) } ``` ### Response (200) ```json { "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" } } ```