Update a memory

----
-title: Update a memory
-url: https://platform.claude.com/docs/en/api/beta/memory_stores/memories/update
----
+# Update a memory
 
-## Update a memory
+**POST** `/v1/memory_stores/{memory_store_id}/memories/{memory_id}`
 
-**post** `/v1/memory_stores/{memory_store_id}/memories/{memory_id}`
-
 Update a memory
 
-### Path Parameters
+## Path parameters
 
 - `memory_store_id: string`
 
 - `memory_id: string`
 
-### Query Parameters
+## Query parameters
 
 - `view: optional BetaManagedAgentsMemoryView`
 

 
   - `"full"`
 
-### Header Parameters
+## Headers
 
 - `"anthropic-beta": optional array of AnthropicBeta`
 

 
     - `"mid-conversation-tool-changes-2026-07-01"`
 
-### Body Parameters
+## Body parameters
 
 - `content: optional string or null`
 

 
   New path for the memory (a rename). Must start with `/`, contain at least one non-empty segment, and be at most 1,024 bytes. Must not contain empty segments, `.` or `..` segments, control or format characters, and must be NFC-normalized. Paths are case-sensitive. The memory's `id` is preserved across renames. Omit to leave the path unchanged.
 
+  minLength: 2, maxLength: 1024
+
 - `precondition: optional BetaManagedAgentsPrecondition`
 
   Optimistic-concurrency precondition: the update applies only if the memory's stored `content_sha256` equals the supplied value. On mismatch, the request returns `memory_precondition_failed_error` (HTTP 409); re-read the memory and retry against the fresh state. If the precondition fails but the stored state already exactly matches the requested `content` and `path`, the server returns 200 instead of 409.

 
   - `type: "content_sha256"`
 
-    - `"content_sha256"`
-
   - `content_sha256: optional string`
 
     Expected `content_sha256` of the stored memory (64 lowercase hexadecimal characters). Typically the `content_sha256` returned by a prior read or list call. Because the server applies no content normalization, clients can also compute this locally as the SHA-256 of the UTF-8 content bytes.
 
-### Returns
+## Returns
 
-- `BetaManagedAgentsMemory object { id, content_sha256, content_size_bytes, 7 more }`
+- `BetaManagedAgentsMemory object`
 
   A `memory` object: a single text document at a hierarchical path inside a memory store. The `content` field is populated when `view=full` and `null` when `view=basic`; the `content_size_bytes` and `content_sha256` fields are always populated so sync clients can diff without fetching content. Memories are addressed by their `mem_...` ID; the path is the create key and can be changed via update.
 

 
     Size of `content` in bytes (the UTF-8 plaintext length). Always populated, regardless of `view`.
 
+    format: int32
+
   - `created_at: string`
 
     A timestamp in RFC 3339 format
 
+    format: date-time
+
   - `memory_store_id: string`
 
     ID of the memory store this memory belongs to (a `memstore_...` value).

 
   - `type: "memory"`
 
-    - `"memory"`
-
   - `updated_at: string`
 
     A timestamp in RFC 3339 format
 
+    format: date-time
+
   - `content: optional string or null`
 
     The memory's UTF-8 text content. Populated when `view=full`; `null` when `view=basic`. Maximum 100 kB (102,400 bytes).
 
-### Example
+## Example
 
-```http
+```bash
 curl https://api.anthropic.com/v1/memory_stores/$MEMORY_STORE_ID/memories/$MEMORY_ID \
     -H 'Content-Type: application/json' \
     -H 'anthropic-version: 2023-06-01' \

     -d '{}'
 ```
 
-#### Response
+### Response (200)
 
 ```json
 {