Feature types - Unprice Documentation

Each feature in a plan version has one pricing type. The type defines how Unprice calculates the feature charge. It does not define whether your product workload runs. Use access.check or usage.consume when the request path must make that decision.

Type	Charge rule	Typical use
Flat	One fixed amount for the feature.	Base fee, premium support, or SSO access.
Tier	The price depends on the tier that applies to the quantity.	Seats or volume-based pricing.
Usage	The charge follows metered consumption.	API requests, tokens, bandwidth, or storage.
Package	The charge covers fixed groups of units.	Credit packs or seat bundles.

Tier modes

Use a volume tier when every unit uses the price of the highest tier reached. Use a graduated tier when each tier prices only its own units. For example, with 100 units at $10 and units above 100 at $8:

Volume pricing charges 150 units at $8 each.
Graduated pricing charges the first 100 units at $10 and the next 50 units at $8.

Usage features need a meter

A usage feature needs a meter. The meter selects the event slug, aggregation method, and event property that produce the billable quantity. A flat, tier, or package feature does not use a meter for its charge. Read Usage metering before you configure a usage feature.