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Two methods for buyers a card processor cannot reach. Rewarble accepts prepaid gift card vouchers, and MisticPay accepts PIX, Brazil’s instant bank transfer network.

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Rewarble

Rewarble lets buyers pay with gift card vouchers, which reaches people who have no card or bank account. It requires a Rewarble account that has taken at least 500 EUR in lifetime deposits. Rewarble does not issue an API key below that threshold. Once the account qualifies, create a key on the Rewarble Client API page and paste it into Client API Key.

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MisticPay

PIX, Brazil’s instant bank transfer system, and the method most Brazilian buyers expect to see.
1

Generate credentials

Open API > Credenciais in your MisticPay dashboard and click Gerar credenciais.
2

Add a webhook

Add a webhook with any name, pointing at your SellAuth webhook URL. It looks like https://webhooks.sellauth.com/v1/misticpay/YOUR_SHOP_ID, and the exact URL is shown in the setup instructions on the payment method page.
3

Grant the permissions

Select Gerar transação and Verificar transação.
4

Paste the credentials

Copy the Client ID and Client Secret into the matching fields and save.
Use Mock Payer Data generates a placeholder name and CPF instead of asking the buyer for theirs. It removes a step at checkout, but the payment then carries no real payer identity, so it is not recommended for production.

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Troubleshooting

Rewarble will not issue an API key. The account has not reached 500 EUR in lifetime deposits. PIX payments are taken but orders stay pending. The MisticPay webhook is missing, pointed at the wrong URL, or lacks the Verificar transação permission.

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Next steps

Supported payment methods

Every method, grouped by type.

Other card processors

Including Mercado Pago for Latin America.