How long does a Magento API integration take?

Rough timelines:

• Single integration (one system, one direction): 1-2 weeks
• Multi-system integration (ERP + CRM + marketplace, two-way): 3-6 weeks
• Custom platform / middleware (high volume, 4+ systems): 6-12 weeks

Discovery and sandbox testing are included, we don’t cut a go-live until you’ve signed off the data flowing correctly in a sandbox.