Get a memory

Introduced 2.12

Use this API to retrieve a conversational memory for conversational search.

To retrieve memory information, you can:

• Get a memory by ID.
• Get all memories.

To retrieve message information for a memory, you can:

• Get all messages within a memory.
• Search for messages within a memory.

When the Security plugin is enabled, all memories exist in a private security mode. Only the user who created a memory can interact with that memory and its messages.

Get a memory by ID

You can retrieve memory information by using the memory_id. The response includes all messages within the memory.

Endpoints

GET /_plugins/_ml/memory/<memory_id>

Path parameters

The following table lists the available path parameters.

Example request

GET /_plugins/_ml/memory/N8AE1osB0jLkkocYjz7D

Example response

{
  "memory_id": "gW8Aa40BfUsSoeNTvOKI",
  "create_time": "2024-02-02T18:07:06.887061463Z",
  "updated_time": "2024-02-02T19:01:32.121444968Z",
  "name": "Conversation for a RAG pipeline",
  "user": "admin"
}

Get all memories

Use this command to get all memories.

Endpoints

GET /_plugins/_ml/memory

Query parameters

Use the following query parameters to customize your results. All query parameters are optional.

Paginating results

The next_token parameter provides the ordered position of the first memory within the sorted list of memories to return in the results. When a memory is added between subsequent GET Memory calls, one of the listed memories will be duplicated in the results. For example, suppose the current ordered list of memories is BCDEF, where B is the memory created most recently. When you call the Get Memory API with next_token=0 and max_results=3, the API returns BCD. Suppose you then create another memory A. The memory list now appears as ABCDEF. The next time you call the Get Memory API with next_token=3 and max_results=3, you’ll receive DEF in the results. Notice that D will be returned in the first and second batches of results. The following diagram illustrates the duplication.

Example request: Get all memories

GET /_plugins/_ml/memory/

Example request: Paginating results

GET /_plugins/_ml/memory?max_results=2&next_token=1

Example response

{
  "memories": [
    {
      "memory_id": "gW8Aa40BfUsSoeNTvOKI",
      "create_time": "2024-02-02T18:07:06.887061463Z",
      "updated_time": "2024-02-02T19:01:32.121444968Z",
      "name": "Conversation for a RAG pipeline",
      "user": "admin"
    }
  ]
}

Response body fields

The following table lists the available response fields.