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3 articles Integrations online invoice payments Clear all filters

Integrations28 Sept 2026 3 min read

Connect PayPal to Xcellerate OPS: let customers pay invoices with PayPal

With the Client ID and Client secret of your own PayPal app, the payment page of every sent invoice in Xcellerate OPS gets a PayPal button. Test in the sandbox first.

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Integrations28 Sept 2026 3 min read

Connect Stripe to Xcellerate OPS: let customers pay invoices by card

With your own Stripe secret key, the payment page of every sent invoice in Xcellerate OPS gets a Stripe button. Your customer pays by card and the invoice switches to Paid.

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Integrations28 Sept 2026 4 min read

Connect Mollie to Xcellerate OPS: let customers pay invoices online

With your own Mollie API key, every sent invoice in Xcellerate OPS gets a pay link. The money lands with you and the invoice switches to Paid automatically.

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