[role="xpack"]
[testenv="basic"]
[[get-inference]]
=== Get {infer} trained model API
[subs="attributes"]
++++
<titleabbrev>Get {infer} trained model</titleabbrev>
++++

Retrieves configuration information for a trained {infer} model.

experimental[]


[[ml-get-inference-request]]
==== {api-request-title}

`GET _ml/inference/` +

`GET _ml/inference/<model_id>` +

`GET _ml/inference/_all` +

`GET _ml/inference/<model_id1>,<model_id2>` +

`GET _ml/inference/<model_id_pattern*>`


[[ml-get-inference-prereq]]
==== {api-prereq-title}

Required privileges which should be added to a custom role:

* cluster: `monitor_ml`
  
For more information, see <<security-privileges>> and <<built-in-roles>>.


[[ml-get-inference-desc]]
==== {api-description-title}

You can get information for multiple trained models in a single API request by 
using a comma-separated list of model IDs or a wildcard expression.


[[ml-get-inference-path-params]]
==== {api-path-parms-title}

`<model_id>`::
(Optional, string) 
include::{es-repo-dir}/ml/ml-shared.asciidoc[tag=model-id]


[[ml-get-inference-query-params]]
==== {api-query-parms-title}

`allow_no_match`::
(Optional, boolean) 
include::{es-repo-dir}/ml/ml-shared.asciidoc[tag=allow-no-match]

`decompress_definition`::
(Optional, boolean)
Specifies whether the included model definition should be returned as a JSON map 
(`true`) or in a custom compressed format (`false`). Defaults to `true`.

`from`::
(Optional, integer) 
include::{es-repo-dir}/ml/ml-shared.asciidoc[tag=from]

`include_model_definition`::
(Optional, boolean)
Specifies if the model definition should be returned in the response. Defaults 
to `false`. When `true`, only a single model must match the ID patterns 
provided, otherwise a bad request is returned.

`size`::
(Optional, integer) 
include::{es-repo-dir}/ml/ml-shared.asciidoc[tag=size]

`tags`::
(Optional, string)
include::{es-repo-dir}/ml/ml-shared.asciidoc[tag=tags]

`for_export`::
(Optional, boolean)
Indicates if certain fields should be removed from the model configuration on
retrieval. This allows the model to be in an acceptable format to be retrieved
and then added to another cluster. Default is false.

[role="child_attributes"]
[[ml-get-inference-results]]
==== {api-response-body-title}

`trained_model_configs`::
(array)
An array of trained model resources, which are sorted by the `model_id` value in 
ascending order.
+
.Properties of trained model resources
[%collapsible%open]
====
`created_by`:::
(string)
Information on the creator of the trained model.

`create_time`:::
(<<time-units,time units>>)
The time when the trained model was created.

`default_field_map` :::
(object)
A string to string object that contains the default field map to use
when inferring against the model. For example, data frame analytics
may train the model on a specific multi-field `foo.keyword`.
The analytics job would then supply a default field map entry for
`"foo" : "foo.keyword"`.
+
Any field map described in the inference configuration takes precedence.

`estimated_heap_memory_usage_bytes`:::
(integer)
The estimated heap usage in bytes to keep the trained model in memory.

`estimated_operations`:::
(integer)
The estimated number of operations to use the trained model.

`license_level`:::
(string)
The license level of the trained model.

`metadata`:::
(object)
An object containing metadata about the trained model. For example, models 
created by {dfanalytics} contain `analysis_config` and `input` objects.

`model_id`:::
(string)
Idetifier for the trained model.

`tags`:::
(string)
A comma delimited string of tags. A {infer} model can have many tags, or none.

`version`:::
(string)
The {es} version number in which the trained model was created.
====

[[ml-get-inference-response-codes]]
==== {api-response-codes-title}

`400`::
  If `include_model_definition` is `true`, this code indicates that more than 
  one models match the ID pattern.

`404` (Missing resources)::
  If `allow_no_match` is `false`, this code indicates that there are no
  resources that match the request or only partial matches for the request.
  

[[ml-get-inference-example]]
==== {api-examples-title}

The following example gets configuration information for all the trained models:

[source,console]
--------------------------------------------------
GET _ml/inference/
--------------------------------------------------
// TEST[skip:TBD]