Air Filter API for Resellers

Connect your store and sell Filter King Filters on your website. We handle fulfillment — you focus on sales

Apply See documentation

Full catalog, no inventory

Sell 1,000+ filter sizes without holding stock

Automated order flow

Send orders from your store automatically

Real-time pricing & stock

Always show accurate, live data in your store

Fast delivery across USA

Four fulfillment centers mean most orders arrive in 1-2 days

Sell air filters on your website — we handle the rest

Your store, our catalog

Fill your store with 1,000+ air filter sizes (MERV 8, 11, 13 + MERV 8 Carbon) or let your customers order their own custom size — all connected to your website through a simple REST API. No inventory required!

Made & shipped from the USA

All filters are made in the US and ship from one of four fulfillment centers across the country. Your customers get a quality American-made product delivered fast — and you get a fulfillment partner you can rely on.

New revenue stream without the risk

Air filters are a high-demand, repeat-purchase product. Add them to your store through the Filter King API and start selling without upfront inventory costs, warehouse space, or fulfillment overhead.

Ready to integrate FilterKing?

Access real-time product data, automate your order flow, and start selling air filters on your website today.

Apply

What can you do with the Filter King API?

1. Automate order processing

Connect your store to Filter King and send orders automatically through the API. No manual handling, no double data entry — just seamless order flow.
2. Offer a complete filter range

Display Filter King's full catalog with real-time pricing, specifications, and stock availability — without holding any inventory.
3. Let us handle logistics

We manage stock, packing, and shipping directly to your customer. You stay focused on sales - we take care of the rest.

Why partner with Filter King?

Made in the USA

Every filter is manufactured and assembled in the United States.

Durable & long-lasting

High-quality materials deliver reliable performance and a longer service life.

Over 1,000 sizes available

From standard to hard-to-find dimensions, Filter King stocks a size for every customer.

Guaranteed to fit

Every filter is manufactured to precise dimensions and backed by a 30-day money-back guarantee.

Fast, reliable fulfillment

Four fulfillment centers across the US ensure most orders arrive within 1-2 days.

Simple API integration

Our REST API connects cleanly to any modern platform with clear documentation and code examples.

Explore our API documentation

Access detailed endpoint references, authentication instructions, and real integration examples to get started quickly.

See documentation

Nationwide fulfillment, fast delivery

Four fulfillment centers across the US ensure orders are processed and shipped quickly — so your customers get their filters fast

Ready to start selling?

Apply for API access and start selling air filters on your website in days.