Top 5 APIs Every E-commerce Platform Must Test

Prevent cart drops & payment fails Faster pages, higher conversions Protect data & brand trust

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1. Auth & User Accounts API

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2. Catalog & Inventory API

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3. Cart, Pricing & Promo API

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4. Checkout & Payments API

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Order states: placed→delivered→RMA Split shipments & partial refunds Tracking links & address validation

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Performance & Resilience

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Prevent cart drops & payment fails Faster pages, higher conversions Protect data & brand trust

Why API Testing?

1. Auth & User Accounts API

Login/OTP/Social sign-in flows JWT/refresh tokens & expiry Password reset + MFA edge cases

2. Catalog & Inventory API

Variants, pagination, filters Real-time stock sync & backorders Caching, ETags, 304 responses

3. Cart, Pricing & Promo API

Coupon stacking & exclusions Taxes, fees, shipping rules Multi-currency & rounding

4. Checkout & Payments API

3D Secure/UPI/wallets/COD Idempotency on retries/timeouts Webhooks: success, fail, refund

Order states: placed→delivered→RMA Split shipments & partial refunds Tracking links & address validation

5. Orders & Shipping API

Performance & Resilience

Load tests for sale-day spikes Rate limits, timeouts, retries Circuit breaker & fallback paths

Ready to bullet-proof your store’s APIs?

Let’s fix leaks, boost speed & conversions.