Return to Answer

My guess would be that the variable $option you're creating doesn't follow the guidelines you find in the Magento DevDoc.

Payload should be

{ "option": { "attribute_id": "141", "label": "Size", "position": 0, "is_use_default": true, "values": [ // -> this is an array {  "value_index": 9 // -> this is an object within an array } ] } } 

What you're creating is:

$option = [ "option" => [ "attribute_id"=> "63", "label"=> "Size", "values"=> [ // -> this is an object [   "value_index"=> 54164121323 //-> this is an object within an object ] ] ], ]; 

What is the response you get from http://localhost/magentoTest5/rest/V1/configurable-products/747682908/options? 200?

EDIT:

Try this instead:

$option = [ "option" => [ "attribute_id"=> "63", "label"=> "Size", "values"=> array( [ "value_index"=> 100 ] ) ], ]; 

My guess would be that the variable $option you're creating doesn't follow the guidelines you find in the Magento DevDoc.

Payload should be

{ "option": { "attribute_id": "141", "label": "Size", "position": 0, "is_use_default": true, "values": [ // -> this is an array { // -> this is an object within an array "value_index": 9  } ] } } 

What you're creating is:

$option = [ "option" => [ "attribute_id"=> "63", "label"=> "Size", "values"=> [ // -> this is an object [ //-> this is an object within an object  "value_index"=> 54164121323  ] ] ], ]; 

What is the response you get from http://localhost/magentoTest5/rest/V1/configurable-products/747682908/options? 200?

EDIT:

Try this instead:

$option = [ "option" => [ "attribute_id"=> "63", "label"=> "Size", "values"=> array( [ "value_index"=> 100 ] ) ], ]; 

My guess would be that the variable $option you're creating doesn't follow the guidelines you find in the Magento DevDoc.

Payload should be

{ "option": { "attribute_id": "141", "label": "Size", "position": 0, "is_use_default": true, "values": [ // -> this is an array { "value_index": 9 // -> this is an object within an array } ] } } 

What you're creating is:

$option = [ "option" => [ "attribute_id"=> "63", "label"=> "Size", "values"=> [ // -> this is an object [ "value_index"=> 54164121323 //-> this is an object within an object ] ] ], ]; 

What is the response you get from http://localhost/magentoTest5/rest/V1/configurable-products/747682908/options? 200?

EDIT:

Try this instead:

$option = [ "option" => [ "attribute_id"=> "63", "label"=> "Size", "values"=> array( [ "value_index"=> 54164121323 //-ìì ] ) ], ]; 

My guess would be that the variable $option you're creating doesn't follow the guidelines you find in the Magento DevDoc.

Payload should be

{ "option": { "attribute_id": "141", "label": "Size", "position": 0, "is_use_default": true, "values": [ // -> this is an array { "value_index": 9 // -> this is an object within an array } ] } } 

What you're creating is:

$option = [ "option" => [ "attribute_id"=> "63", "label"=> "Size", "values"=> [ // -> this is an object [ "value_index"=> 54164121323 //-> this is an object within an object ] ] ], ]; 

What is the response you get from http://localhost/magentoTest5/rest/V1/configurable-products/747682908/options? 200?

EDIT:

Try this instead:

$option = [ "option" => [ "attribute_id"=> "63", "label"=> "Size", "values"=> array( [ "value_index"=> 100 ] ) ], ]; 

My guess would be that the variable $option you're creating doesn't follow the guidelines you find in the Magento DevDoc.

Payload should be

{ "option": { "attribute_id": "141", "label": "Size", "position": 0, "is_use_default": true, "values": [ // -> this is an array { "value_index": 9 // -> this is an object within an array } ] } } 

What you're creating is:

$option = [ "option" => [ "attribute_id"=> "63", "label"=> "Size", "values"=> [ // -> this is an object [ "value_index"=> 54164121323 //-> this is an object within an object ] ] ], ]; 

What is the response you get from http://localhost/magentoTest5/rest/V1/configurable-products/747682908/options? 200?

EDIT:

Try this instead:

$option = [ "option" => [ "attribute_id"=> "63", "label"=> "Size", "values"=> array([ [ "value_index"=> 54164121323 //-ìì ] ]) ], ]; 

My guess would be that the variable $option you're creating doesn't follow the guidelines you find in the Magento DevDoc.

Payload should be

{ "option": { "attribute_id": "141", "label": "Size", "position": 0, "is_use_default": true, "values": [ // -> this is an array { "value_index": 9 // -> this is an object within an array } ] } } 

What you're creating is:

$option = [ "option" => [ "attribute_id"=> "63", "label"=> "Size", "values"=> [ // -> this is an object [ "value_index"=> 54164121323 //-> this is an object within an object ] ] ], ]; 

What is the response you get from http://localhost/magentoTest5/rest/V1/configurable-products/747682908/options? 200?

EDIT:

Try this instead:

$option = [ "option" => [ "attribute_id"=> "63", "label"=> "Size", "values"=> array( [ "value_index"=> 54164121323 //-ìì ] ) ], ];