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OpenSearch:ListModels

Last Updated:Sep 22, 2025

Queries for models in an instance that meet specified criteria.

Operation description

Request description

This API retrieves a list of models from a specified instance. The instance ID is a required path parameter. You can filter the results using optional query parameters, such as model name, type, and paging parameters.

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Test

RAM authorization

The table below describes the authorization required to call this API. You can define it in a Resource Access Management (RAM) policy. The table's columns are detailed below:

  • Action: The actions can be used in the Action element of RAM permission policy statements to grant permissions to perform the operation.

  • API: The API that you can call to perform the action.

  • Access level: The predefined level of access granted for each API. Valid values: create, list, get, update, and delete.

  • Resource type: The type of the resource that supports authorization to perform the action. It indicates if the action supports resource-level permission. The specified resource must be compatible with the action. Otherwise, the policy will be ineffective.

    • For APIs with resource-level permissions, required resource types are marked with an asterisk (*). Specify the corresponding Alibaba Cloud Resource Name (ARN) in the Resource element of the policy.

    • For APIs without resource-level permissions, it is shown as All Resources. Use an asterisk (*) in the Resource element of the policy.

  • Condition key: The condition keys defined by the service. The key allows for granular control, applying to either actions alone or actions associated with specific resources. In addition to service-specific condition keys, Alibaba Cloud provides a set of common condition keys applicable across all RAM-supported services.

  • Dependent action: The dependent actions required to run the action. To complete the action, the RAM user or the RAM role must have the permissions to perform all dependent actions.

Action

Access level

Resource type

Condition key

Dependent action

searchengine:ListModels

list

*Instance

acs:searchengine:{#regionId}:{#accountId}:instance/{#InstanceId}

None None

Request syntax

GET /openapi/ha3/instances/{instanceId}/models HTTP/1.1

Request parameters

Parameter

Type

Required

Description

Example

instanceId

string

Yes

The instance ID.

ha-cn-test

name

string

No

The model name.

test1

type

string

No

The model type.

text_embedding

pageNumber

integer

No

The page number. The default value is 1.

1

pageSize

integer

No

The number of entries per page. The default value is 10.

10

Response elements

Element

Type

Description

Example

object

The response includes the request ID and a list of models. Each element in the list contains details about a model, such as its name, type, URL, and status.

requestId

string

The request ID.

38b079f1-7846-4226-8c90-3e2644b5c52b

totalCount

integer

The total number of entries.

14

result

array<object>

A list of models. For more information, see Model.

object

The model information.

name

string

The model name.

test

type

string

The model type.

  • Text embedding: text_embedding

  • Text sparse embedding: text_sparse_embedding

  • Image embedding: image_embedding

  • Image content parsing: image_analyze

text_embedding

url

string

The endpoint of the model service.

http://***.platform-cn-shanghai.opensearch.aliyuncs.com/v3/openapi/workspaces/default/text-embedding/ops-text-embedding-001

status

string

The model status.

  • ok: The model is active.

  • forbidden: The model is unavailable.

ok

dimension

integer

The dimension of the model.

128

content

object

The content information of the model.

modelName

string

The model name.

test

modelType

string

The model type.

  • Text embedding: text_embedding

  • Text sparse embedding: text_sparse_embedding

  • Image embedding: image_embedding

  • Image content parsing: image_analyze

text_embedding

url

string

The endpoint of the model service.

http://***.platform-cn-shanghai.opensearch.aliyuncs.com/v3/openapi/workspaces/default/text-embedding/ops-text-embedding-001

method

string

The HTTP method to access the model service. Supported methods are PUT and POST.

POST

request

object

The request configuration.

header

object

The HTTP header to access the model service.

Authorization

string

The authentication information. Format: Bearer access_token

Bearer OS-v0********6vvs

Content-Type

string

The HTTP request content type.

application/json

urlParams

object

The parameters in the URL. Some model services require that parameters are passed in the URL.

build

object

The parameters passed during index building.

key: value

search

object

The parameters passed during a query.

key: value

requestBody

string

The template string for the request body.

{\"input\": [\"%{input}\"], \"input_type\": \"%{input_type}\"}

parameters

object

If body parameters must differ between the build and search phases, define them in this object.

build

object

The parameters for the index building phase.

input_type

string

The input type.

query

search

object

The parameters for the query phase.

input_type

string

The input type.

document

response

object

The JSONPath expression used to parse the result.

embeddings

string

The JSONPath expression used to parse the result.

$.result.embeddings[*].embedding

createTime

string

The time when the model was created.

2024-05-21 16:05:26

updateTime

string

The time when the model was last modified.

2024-05-21 16:05:26

Examples

Success response

JSON format

{
  "requestId": "38b079f1-7846-4226-8c90-3e2644b5c52b",
  "totalCount": 14,
  "result": [
    {
      "name": "test",
      "type": "text_embedding",
      "url": "http://***.platform-cn-shanghai.opensearch.aliyuncs.com/v3/openapi/workspaces/default/text-embedding/ops-text-embedding-001",
      "status": "ok",
      "dimension": 128,
      "content": {
        "modelName": "test",
        "modelType": "text_embedding",
        "url": "http://***.platform-cn-shanghai.opensearch.aliyuncs.com/v3/openapi/workspaces/default/text-embedding/ops-text-embedding-001",
        "method": "POST",
        "request": {
          "header": {
            "Authorization": "Bearer OS-v0********6vvs\n",
            "Content-Type": "application/json\n"
          },
          "urlParams": {
            "build": {
              "test": "test",
              "test2": 1
            },
            "search": {
              "test": "test",
              "test2": 1
            }
          },
          "requestBody": "{\\\"input\\\": [\\\"%{input}\\\"], \\\"input_type\\\": \\\"%{input_type}\\\"}",
          "parameters": {
            "build": {
              "input_type": "query\n"
            },
            "search": {
              "input_type": "document\n"
            }
          }
        },
        "response": {
          "embeddings": "$.result.embeddings[*].embedding\n"
        }
      },
      "createTime": "2024-05-21 16:05:26",
      "updateTime": "2024-05-21 16:05:26"
    }
  ]
}

Error codes

See Error Codes for a complete list.

Release notes

See Release Notes for a complete list.