The MerxumOS Open API lets you read and write your business data — products, sales, customers and more — to build custom integrations. The API is available on the Reign plan.
Authentication
Generate an API key from Settings → Integrations → Developer API. Send it as a Bearer token on every request. Keep keys secret and rotate them if exposed.
curl https://app.merxumos.com/api/public/v1/products \
-H "Authorization: Bearer YOUR_API_KEY"Webhooks
Subscribe to events (such as a completed sale or a low-stock alert) and MerxumOS will POST them to your endpoint. Configure subscriptions, replay deliveries and pick event types in Settings → Integrations → Webhooks.
Note — Full endpoint-by-endpoint reference is rolling out. Need an endpoint that isn't documented yet? Contact support and we'll point you to it.