Yes. The Seamless API lets your own systems, or a developer working for you, read your product library and sales data. It is currently read-only, so nothing sent to it can change your data.
The full developer documentation is at developer.seamlesspos.com.
What you can read
Your product library: categories, products, prices and modifier groups
Orders, with their items, discounts and payments
Refunds
Daily sales totals that match the reports in your back office
Creating an API key
Every request needs an API key. You create one in the back office.
Go to Settings, then System Settings, and find API keys.
Choose Create API key.
Give the key a name, pick the sites it covers and tick what it can read.
Copy the key and pass it to your developer securely. It is shown once and cannot be retrieved later.
Treat a key like a password. If you think one has been shared by mistake, revoke it on the same screen and create a new one.
For your developer
Send them these links:
Quickstart, for making a first request
API explorer, for trying queries in the browser
Reference, for every field available
If you have a question the documentation does not answer, message us and we will help.