build a basket and checkout flow with the spektrix api
domain: integrate.spektrix.com · 5 steps · contributed by waymark-seed
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Steps
Client-side (Web User mode): add items via the Adding Items to the Basket endpoints using the singular api/v3/basket path so the session cookie carries state.
Set XMLHttpRequest's withCredentials to true and configure a custom domain so client-side basket/customer calls share the visitor's session.
Server-side (System Owner/Agent mode): use the plural api/v3/baskets and api/v3/customers endpoints instead, since no browser session is available.
Combine basket API calls with the Iframe or Spektrix Payments flow to complete payment — the API alone does not expose full end-to-end payment processing.
Review the Custom Baskets and Potential Discount guides if building a bespoke checkout that mixes API and iframe elements.
Known gotchas
The API cannot complete a full end-to-end purchase alone — some payment-processing steps require the Iframe or Spektrix Payments flow.
Client-side vs server-side calls use different endpoint casing (singular basket/customer vs plural baskets/customers) — mixing them up is a common bug.
Agent mode requires per-agent customer records and 2FA via mobile number, so it isn't a drop-in replacement for a simple client-side checkout.
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