Retrieve a memory version changedapi/beta/memory_stores/memory_versions/retrieve
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# Retrieve a memory version ## Path parameters ## Query parameters ## Headers ## Returns ## Example ### Response (200) ## Retrieve a memory version ### Path Parameters ### Query Parameters ### Header Parameters ### Returns ### Example #### Response
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1---
2title: Retrieve a memory version
3url: https://platform.claude.com/docs/en/api/beta/memory_stores/memory_versions/retrieve
4---
1# Retrieve a memory version
52
6## Retrieve a memory version
3**GET** `/v1/memory_stores/{memory_store_id}/memory_versions/{memory_version_id}`
74
8**get** `/v1/memory_stores/{memory_store_id}/memory_versions/{memory_version_id}`
9
105Retrieve a memory version
116
12### Path Parameters
7## Path parameters
138
149- `memory_store_id: string`
1510
1611- `memory_version_id: string`
1712
18### Query Parameters
13## Query parameters
1914
2015- `view: optional BetaManagedAgentsMemoryView`
2116
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2520
2621 - `"full"`
2722
28### Header Parameters
23## Headers
2924
3025- `"anthropic-beta": optional array of AnthropicBeta`
3126
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10398
10499 - `"mid-conversation-tool-changes-2026-07-01"`
105100
106### Returns
101## Returns
107102
108- `BetaManagedAgentsMemoryVersion object { id, created_at, memory_id, 10 more }`
103- `BetaManagedAgentsMemoryVersion object`
109104
110105 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 persist after the memory 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.
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117112
118113 A timestamp in RFC 3339 format
119114
115 format: date-time
116
120117 - `memory_id: string`
121118
122119 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 full lineage including the `deleted` row.
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137134
138135 - `type: "memory_version"`
139136
140 - `"memory_version"`
141
142137 - `content: optional string or null`
143138
144139 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.
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152147 Size of `content` in bytes as of this version. `null` when `redacted_at` is set or `operation` is `deleted`. Populated regardless of `view` otherwise.
153148
149 format: int32
150
154151 - `created_by: optional BetaManagedAgentsActor`
155152
156153 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](/docs/en/api/sessions-retrieve).
157154
158 - `BetaManagedAgentsSessionActor object { session_id, type }`
155 - `BetaManagedAgentsSessionActor object`
159156
160157 Attribution for a write made by an agent during a session, through the mounted filesystem at `/mnt/memory/`.
161158
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163160
164161 ID of the session that performed the write (a `sesn_...` value). Look up the session via [Retrieve a session](/docs/en/api/sessions-retrieve) for further provenance.
165162
163 minLength: 1
164
166165 - `type: "session_actor"`
167166
168 - `"session_actor"`
167 - `BetaManagedAgentsAPIActor object`
169168
170 - `BetaManagedAgentsAPIActor object { api_key_id, type }`
171
172169 Attribution for a write made directly via the public API (outside of any session).
173170
174171 - `api_key_id: string`
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175172
176173 ID of the API key that performed the write. This identifies the key, not the secret.
177174
175 minLength: 1
176
178177 - `type: "api_actor"`
179178
180 - `"api_actor"`
179 - `BetaManagedAgentsUserActor object`
181180
182 - `BetaManagedAgentsUserActor object { type, user_id }`
183
184181 Attribution for a write made by a human user through the Anthropic Console.
185182
186183 - `type: "user_actor"`
187184
188 - `"user_actor"`
189
190185 - `user_id: string`
191186
192187 ID of the user who performed the write (a `user_...` value).
193188
194 - `BetaManagedAgentsServiceAccountActor object { service_account_id, type }`
189 minLength: 1
195190
191 - `BetaManagedAgentsServiceAccountActor object`
192
196193 Attribution for a write made by a workload authenticated as a service account, for example via Workload Identity Federation.
197194
198195 - `service_account_id: string`
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199196
200197 ID of the service account that performed the write (a `svac_...` value).
201198
199 minLength: 1
200
202201 - `type: "service_account_actor"`
203202
204 - `"service_account_actor"`
205
206203 - `path: optional string or null`
207204
208205 The memory's path at the time of this write. `null` if and only if `redacted_at` is set.
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212209 A timestamp in RFC 3339 format
213210
211 format: date-time
212
214213 - `redacted_by: optional BetaManagedAgentsActor`
215214
216215 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](/docs/en/api/sessions-retrieve).
217216
218### Example
217## Example
219218
220```http
219```bash
221220curl https://api.anthropic.com/v1/memory_stores/$MEMORY_STORE_ID/memory_versions/$MEMORY_VERSION_ID \
222221 -H 'anthropic-version: 2023-06-01' \
223222 -H 'anthropic-beta: agent-memory-2026-07-22' \
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224223 -H "X-Api-Key: $ANTHROPIC_API_KEY"
225224```
226225
227#### Response
226### Response (200)
228227
229228```json
230229{
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