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HomeDocsClaude Developer Platform 12 Oct 2026
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Retrieve a memory version changedapi/beta/memory_stores/memory_versions/retrieve

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170170 - `memory_id: string`
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172 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](/docs/en/api/beta/memory_stores/memory_versions/list) to retrieve the memory's retained versions, including the `deleted` row while the lineage is retained.
172 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=http) to retrieve the memory's retained versions, including the `deleted` row while the lineage is retained.
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174174 - `memory_store_id: string`
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208208 - `created_by: optional BetaManagedAgentsActor`
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210 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](/docs/en/api/beta/sessions/retrieve).
210 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=http).
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212212 - `BetaManagedAgentsSessionActor object`
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218218 - `session_id: string`
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220 ID of the session (a `sesn_...` value). Look up the session via [Retrieve a session](/docs/en/api/beta/sessions/retrieve) for further provenance.
220 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=http) for further provenance.
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222222 minLength: 1
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264264 - `redacted_at: optional string or null`
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266 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](/docs/en/api/beta/memory_stores/memory_versions/redact).
266 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=http).
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268268 format: date-time
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