opensearch-docs-cn/_ml-commons-plugin/api/memory-apis/get-message.md

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---
layout: default
title: Get message
parent: Memory APIs
grand_parent: ML Commons APIs
nav_order: 50
---
# Get message
**Introduced 2.12**
{: .label .label-purple }
Use this API to retrieve message information for [conversational search]({{site.url}}{{site.baseurl}}/search-plugins/conversational-search/).
To retrieve message information, you can:
- [Get a message by ID](#get-a-message-by-id).
- [Get all messages within a memory](#get-all-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.
{: .important}
## Get a message by ID
You can retrieve message information by using the `message_id`.
### Path and HTTP methods
```json
GET /_plugins/_ml/memory/message/<message_id>
```
### Path parameters
The following table lists the available path parameters.
Parameter | Data type | Description
:--- | :--- | :---
`message_id` | String | The ID of the message to retrieve.
#### Example request
```json
GET /_plugins/_ml/memory/message/0m8ya40BfUsSoeNTj-pU
```
{% include copy-curl.html %}
#### Example response
```json
{
"memory_id": "gW8Aa40BfUsSoeNTvOKI",
"message_id": "0m8ya40BfUsSoeNTj-pU",
"create_time": "2024-02-02T19:01:32.113621539Z",
"input": null,
"prompt_template": null,
"response": "Hello, this is OpenAI. Here is the answer to your question.",
"origin": null,
"additional_info": {
"suggestion": "api.openai.com"
}
}
```
For information about response fields, see [Create Message request fields]({{site.url}}{{site.baseurl}}/ml-commons-plugin/api/memory-apis/create-message#request-fields).
## Get all messages within a memory
Use this command to get a list of messages for a certain memory.
### Path and HTTP methods
```json
GET /_plugins/_ml/memory/<memory_id>/messages
```
### Path parameters
The following table lists the available path parameters.
Parameter | Data type | Description
:--- | :--- | :---
`memory_id` | String | The ID of the memory for which to retrieve messages.
#### Example request
```json
GET /_plugins/_ml/memory/gW8Aa40BfUsSoeNTvOKI/messages
```
{% include copy-curl.html %}
```json
POST /_plugins/_ml/message/_search
{
"query": {
"match_all": {}
},
"size": 1000
}
```
{% include copy-curl.html %}
#### Example response
```json
{
"messages": [
{
"memory_id": "gW8Aa40BfUsSoeNTvOKI",
"message_id": "BW8ha40BfUsSoeNT8-i3",
"create_time": "2024-02-02T18:43:23.566994302Z",
"input": "How do I make an interaction?",
"prompt_template": "Hello OpenAI, can you answer this question?",
"response": "Hello, this is OpenAI. Here is the answer to your question.",
"origin": "MyFirstOpenAIWrapper",
"additional_info": {
"suggestion": "api.openai.com"
}
},
{
"memory_id": "gW8Aa40BfUsSoeNTvOKI",
"message_id": "0m8ya40BfUsSoeNTj-pU",
"create_time": "2024-02-02T19:01:32.113621539Z",
"input": null,
"prompt_template": null,
"response": "Hello, this is OpenAI. Here is the answer to your question.",
"origin": null,
"additional_info": {
"suggestion": "api.openai.com"
}
}
]
}
```
## Response fields
For information about response fields, see [Create Message request fields]({{site.url}}{{site.baseurl}}/ml-commons-plugin/api/memory-apis/create-message#request-fields).