Enterprise merchants operate at a different scale than a standard online store. Order volumes are higher, systems are more complex – often a mix of custom ERP, multiple sales channels, and legacy back-office tools – and payment infrastructure decisions need to hold up across markets, currencies, and buyer segments. For these businesses, a plugin built for a single e-commerce platform usually isn’t enough. What’s needed is a flexible, well-documented API that can be mapped directly onto existing systems.
This is exactly what Mondu’s direct API integration is built for. It gives enterprise teams full control over how B2B Buy Now, Pay Later (BNPL) payment methods product portfolio– are embedded into checkout, ERP, or offline sales workflows, without forcing a rebuild of existing processes and workflows.
Mondu also offers e-commerce plugins and PSP-based integrations (such as through Stripe) for SMB merchants who want a faster path to launch. For enterprises that want to offer flexible payment terms without any technical integration at all – for example in telesales, by email, or in on-site sales – Mondu also offers MonduSell, which runs entirely through the Mondu merchant portal and requires no development work. Enterprise clients with custom infrastructure or high-volume, multi-market operations typically default to the direct API for the control it provides.
Talk to Mondu’s team to walk through your systems, timelines, and which payment methods fit your buyers best.
How long does an enterprise integration take?
Timelines vary with system complexity and internal resource availability, but as a general benchmark: full integration typically takes around two months from the point commercials are agreed, though some merchants have gone live in a couple of weeks. Mondu’s integration team supports the technical build throughout, and a customer success team takes over day-to-day management once live.
What payment methods can enterprises offer through the API?
Once integrated, enterprise merchants can present multiple B2B payment methods at checkout or through back-office order creation:
- Pay on invoice – 30 to 90 day payment terms, suited to occasional and first-time B2B buyers.
- Installments – payment spread over 3, 6, or 12 months, suited to larger purchases.
- Digital Trade Account – a single approved credit limit with a consolidated statement, suited to repeat buyers.
- Pay Now – instant account-to-account payment.
In every case, Mondu pays the merchant upfront and assumes 100% of the buyer default risk of approved orders.
Getting started
For enterprise teams ready to scope an integration, the practical next step is getting in touch with Mondu to align on timelines, systems, and which payment methods make sense for your buyers.
Give your B2B checkout the payment flexibility enterprise buyers expect
Mondu’s direct API puts pay on invoice, installments, Digital Trade Account, and Pay Now directly into your existing systems – with Mondu covering 100% of the default risk and paying you upfront on every approved order.
Book a demo to see the integration mapped against your own tech stack, or explore the API documentation to get started right away.
Integration FAQs
Enterprise systems rarely fit into a standard plugin. A direct RESTful API integration gives development teams:
- Full customization
- Compatibility with custom ERP and back-office systems
- Control over the buyer experience
- Support for both e-commerce and offline order flows
Yes. Mondu provides a RESTful API that integrates directly with custom ERP, back-office, and e-commerce systems, independent of the pre-built plugins available for platforms like Shopify, Shopware, WooCommerce, or Magento.
Mondu assumes 100% of the buyer default risk. Merchants are paid upfront for approved orders regardless of when – or whether – the buyer ultimately pays.
Yes. No payout is processed until an invoice is submitted via the API, and invoice submission is what starts the buyer’s payment term. Invoices can be submitted up to 60 days after order creation, and partial invoicing is supported for split shipments.
Yes, before shipment, using the Adjust Order endpoint for product, quantity, or cost changes. Mondu is also offering a web portal for their merchants to do these kinds of adjustments. Buyer information cannot be changed this way, and orders paid via Pay Now can’t be adjusted. Post-shipment changes go through credit notes instead.
Most integrations take about two months from agreed commercials to go-live, though timelines depend heavily on the merchant’s internal engineering availability and the complexity of the integration project. Mondu’s integration team supports the process throughout.
Pay on invoice (30–90 day terms), installments (3, 6, or 12 months), Digital Trade Account for repeat buyers, and Pay Now for instant account-to-account payments.
