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API & Integration

Quantaprice slots into an existing architecture as a dedicated pricing service. Your commerce platform, ERP, or storefront calls the REST API to resolve prices; webhooks push change events downstream so dependent systems stay current without polling. The same conventions for authentication, paging and errors apply to every endpoint; see API Conventions and Errors.

Authentication​

All API requests authenticate with a short-lived access token obtained by exchanging an API key. Each key belongs to one tenant. Token exchange follows the standard OAuth 2.0 client credentials flow, so any HTTP client or OAuth library works. See Authentication.

Loading data​

Load articles, pricelists and prices with batch endpoints that validate each item on its own, then keep them in sync as your source systems change. See Loading Data.

Querying prices​

The price query endpoint takes a list of SKUs, a pricelist filter, a currency and a tax area, and optionally an as_of timestamp. It returns fully resolved prices — inheritance, rules, currency conversion, VAT and rounding — in a single call, in a few milliseconds. One query can carry as many SKUs as your plan's maximum items per request. See Querying Prices.

Storefront prices​

A shop page can fetch prices straight from the shopper's browser with a short-lived storefront token your server mints, without exposing an API key. See Storefront Prices.

Rate limits​

Each tenant has a read and a write limit, each with a sustained rate (items per second) and a burst. Requests cost what they carry, such as SKUs per query or prices per batch. A 429 comes with a Retry-After; a 413 means the request is larger than the plan allows in one go and needs splitting. See Rate Limits.

Change events & webhooks​

Quantaprice keeps a changelog of changes to prices, articles, pricelists, currencies, VAT, rounding profiles and settings. Poll it with a cursor, or register a webhook to be notified as changes happen. Both cover the same events. An event says what changed; fetch the entity for its new state. Webhook deliveries depend on your plan. See Change Events.

AI assistants​

Connect an AI assistant such as Claude to your tenant over MCP, to read the docs, look up prices and make changes with your access. See AI Assistants (MCP).

Shopify B2B​

A Shopify app that prices Shopify B2B storefronts from Quantaprice is in preparation and not yet available in the Shopify App Store. See Shopify B2B for how it will work, and contact us if you are interested.

Commerce platform patterns​

Recommended patterns for storefronts, ERP, CPQ, order management and analytics: where Quantaprice sits in the data flow and which API calls each one makes. See Commerce Platform Patterns.