This route is designed to facilitate pix cashout operations, you send the pixkey, value and tags of the operation and key queries are made internally.
The tag field must be filled in with your identification to reconcile the transaction when receiving the return webhook.

Sample:

{
    "pixkey": +5551998328907,
    "amount": 12.50,
    "tags": [
        "mytransactionId:1234567890.."
    ]
}

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According to a resolution from Bacen (Central Bank of Brazil), the information returned in the key query must not be presented openly, therefore you will receive and send this data to us as you received it, in an encrypted form.