Dominykas

http://dominykasgel.com/woocommerce-rest-api-import-products-json/

Explanation: This allows you import an image to a simple product.

Add "image" to products.json file.

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{
    "product_id": 100,
    "type": "simple",
    "name": "My product 1",
    "description": "My product description 1",
    "regular_price": 100,
    "manage_stock": 1,
    "stock": 3,
    "weight": 0,
    "has_variations": 0,
    "image": "http://localhost/my-image.png"
},

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In get_products_and_variations_from_json() function, below this line: if ( $pre_product['type'] == 'simple' ) :

Add this code:

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if ( $pre_product['image'] ) {
    $product[$key]['images'][] = array(
      'src' => (string) $pre_product['image'],
      'position' => 0
    );
}