Create a JSON file called body.json

{
	"receipt-data" : "<your receipt base64 encoded>",
	"password" :"<your shared secret>"
}

• receipt-data must contain your receipt as a base64 encoded string.
• password is only needed if the receipt if for a recurring subscription product. The shared secret password is available from your team’s iTunes Connect account.

Open favourite terminal, navigate to body.json file’s location and type

curl -H "Content-Type: application/json" --data @body.json https://buy.itunes.apple.com/verifyReceipt

A 200 response and a full JSON detailing the product purchase is returned if all is good.

Look out for 21007 error, which implies that a test receipt was sent to the production server. Simply change the url to https://sandbox.itunes.apple.com/verifyReceipt.

All other 2000x response errors and their meanings can be found here, Apple Docs.

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I enjoy prettify the output using jazor.

[sudo] gem install jazor bundler
curl -H "Content-Type: application/json" --data @body.json https://buy.itunes.apple.com/verifyReceipt | jazor -c