Claude Platform Docs

List memory versions

beta.memory_stores.memory_versions.list(memory_store_id, **kwargs) -> SyncPageCursor[BetaManagedAgentsMemoryVersion]
GET/v1/memory_stores/{memory_store_id}/memory_versions

List memory versions

Parameters
memory_store_id: str
api_key_id: Optional[str]

Query parameter for api_key_id

created_at_gte: Optional[Union[str, datetime]]

Return versions created at or after this time (inclusive).

formatdate-time
created_at_lte: Optional[Union[str, datetime]]

Return versions created at or before this time (inclusive).

formatdate-time
limit: Optional[int]

Query parameter for limit

formatint32
memory_id: Optional[str]

Query parameter for memory_id

operation: Optional[BetaManagedAgentsMemoryVersionOperation]

Query parameter for operation

One of the following:
"created"
"modified"
"deleted"
page: Optional[str]

Query parameter for page

service_account_id: Optional[str]

Query parameter for service_account_id

session_id: Optional[str]

Query parameter for session_id

view: Optional[BetaManagedAgentsMemoryView]

Query parameter for view

One of the following:
"basic"
"full"
betas: Optional[List[AnthropicBetaParam]]

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

One of the following:
str
Literal["message-batches-2024-09-24", "prompt-caching-2024-07-31", "computer-use-2024-10-22", 41 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"
"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"
Returns
class 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.

List memory versions
import os
from anthropic import Anthropic

client = Anthropic(
    api_key=os.environ.get(
        "ANTHROPIC_API_KEY"
    ),  # This is the default and can be omitted
)
page = client.beta.memory_stores.memory_versions.list(
    memory_store_id="memory_store_id",
)
page = page.data[0]
print(page.id)
Returns Examples
Response 200
{
  "data": [
    {
      "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"
      }
    }
  ],
  "next_page": "next_page"
}