API & HEADLESS

Parts Square API & Headless Ecommerce
A Complete Auto Parts Platform in an API

Everything our Turnkey sites can do — catalog, fitment, pricing, carts, orders, B2B/B2C accounts — delivered entirely through APIs so you can build any frontend you want.

Book a Technical Session See API Capabilities
YOUR FRONTEND, OUR ENGINE

One API. Your Frontend. Our Engine.

Total control over the front-end experience without rebuilding the automotive brain

If You're a Larger Retailer, Marketplace, Software Company, or In-House Dev Team, You May Want:

Your Own Custom UI/UX

Complete design freedom and brand control

Your Own Tech Stack

Next.js, React, Vue, native apps, in-store systems, etc.

Total Control

Over the front-end experience and user journeys

What You Shouldn't Have to Rebuild:

2,000+ Brand ACES/PIES Catalog
Year/Make/Model + Enterprise Search
Vendor Integrations & SKU Consolidation
Carts, Checkout, Orders, Taxes & Payments

Parts Square's headless API gives you all of that as a service.

API FEATURES

What the API Gives You

Through the Parts Square API, you can:

Vehicle & Fitment

  • Build Year/Make/Model dropdowns
  • Accept natural language search with fitment-aware results
  • Navigate categories and part types

SKU-Level Data

  • Brand, supplier/vendor information
  • Stock & availability in real-time
  • Pricing respecting your rules and customer-specific pricing

Carts & Orders

  • Add, remove, update items
  • Persist carts for logged-in customers
  • Submit and validate orders via API
  • Receive order status updates and tracking

Accounts & Auth

  • B2C customers with standard accounts
  • B2B accounts with custom pricing
  • Account-level catalogs and restrictions

In Practice, That Means You Can Build:

Full Websites
Mobile Apps
Dealer Portals
Embedded Stores

All driven by one API.

COMPLETE PLATFORM

Headless Commerce Without Rebuilding the Automotive Brain

API Development

You Get:

Our Complete Catalog

2,000+ brands with ACES/PIES data, your private labels, and custom products

All Vendor Integrations

Fulfillment rules, inventory sync, pricing engines, shipping, and routing

Full Business Logic

Payments/checkout logic in sync with your business rules

We Handle:
  • Keeping catalog and fitment data current
  • Maintaining and tuning Year/Make/Model and AI search
  • Vendor inventory sync and pricing engines
  • Shipping, routing, and payment logic

You focus on what users see. We focus on everything under the waterline.

UNIFIED PLATFORM

B2B and B2C in the Same API

The Parts Square API understands both consumer and business workflows

B2C Flows

  • Guest or registered users
  • Standard pricing and promotions

B2B Flows

  • Account-level pricing and credit terms
  • Restricted catalogs or product lines
  • Multi-location dealers, fleets, and networks

When an Authenticated B2B User Calls the API, Responses Automatically Reflect:

Their Price Levels
Allowed Brands & Products
Their Shipping Rules

You don't need separate platforms or databases for B2B vs B2C — it's one engine, parameterized by account.

REAL-WORLD APPLICATIONS

What Teams Build with the Parts Square API

Enterprise Websites

Large retailers that want totally customized front ends with complete brand control

Marketplaces

Multi-seller platforms that need reliable fitment data and order routing across many vendors

Dealer/Group Portals

Unified catalog and pricing to dealer networks, franchise groups, or fleets

In-Store Tools

Service writer and counter tools that speak the same catalog as your e-commerce site

Mobile Apps

Native apps for DIYers, shops, or fleet managers with full commerce capabilities

Custom Platforms

Any application where you need parts, fitment, pricing, and ordering

Anywhere you need parts, fitment, pricing, and ordering — the API can power it.

ECOSYSTEM STRENGTH

A Platform That Grows with Every Integration

The Parts Square API is more than a technical interface

Integration Point for the Industry

A leverage point for other software companies in the automotive space to build on proven infrastructure rather than starting from scratch.

Backend Platform for Agencies

Agencies and dev shops can turn Parts Square into a complete backend platform for their automotive clients, delivering faster with less risk.

Scalable Revenue Model

A usage-driven revenue stream that sits under multiple frontends, growing as your business and partners grow.

As More Companies Build on the API:
  • More traffic and orders flow through the Parts Square engine
  • More value gets concentrated in the catalog, pricing, and vendor layers
  • The ecosystem — and its competitive advantages — grows stronger
API Ecosystem

True Headless Auto Parts E-Commerce

If you want true headless auto parts e-commerce — where one API gives you catalog, fitment, pricing, carts, checkout, and vendor routing — book a technical session and we'll walk your team through the Parts Square API.

Talk to an Auto Parts Ecommerce Expert

Tell us where your business is today and where you want it to go. We’ll show you how Parts Square can connect your vendors, catalog data, and storefront into one system.

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Simple Pricing for serious sellers
Starting at $745 USD /mo
+ 2% of sales · No hidden fees
Volume discounts available
1
Book a Demo We’ll review your business and schedule a quick call to walk you through the Parts Square platform.
2
Get Your Custom Plan We’ll map out your vendors, data sources, and launch timeline so you know exactly what’s involved.
3
Launch in as little as 30 days Done-for-you setup and onboarding with dedicated support.
Done-for-you onboarding & data migration
2,000+ brands pre-integrated
Connect to major warehouse distributors
Clear, transparent terms