Customs API
Bring AI-assisted customs into your own systems. The Niel Customs API lets your platform request HTS classification, duty estimates and shipment data programmatically — with a licensed broker reviewing filings.
Classification and duty as endpoints
Call the API to get HTS classification suggestions and duty and landed-cost estimates, so your ERP, TMS or marketplace can quote import costs automatically.
Manage shipments programmatically
Create and track cases and shipments through the API and keep your own systems in sync with the customs workflow.
Key-based access and controls
Access is authenticated with API keys you manage in your account, with the same licensed-broker review on anything that is actually filed.
Built for developers
See the developer documentation for endpoints, authentication and examples, and start integrating against your account.
Frequently asked questions
What can the customs API do?
It exposes HTS classification, duty and landed-cost estimation and shipment/case management so you can embed customs into your own software.
How do I authenticate?
With API keys you create and manage in your account. See the developer documentation for details.
Does the API file entries automatically?
The API handles data and estimates. Any actual filing is still reviewed and signed off by a licensed customs broker.
Related solutions
Integrate customs into your platform
Talk to a licensed U.S. customs broker, or create a free account to explore the AI customs platform.