OpenIAP Commerce ProtocolOpen standard

Build your part.Connect the whole.

A shared contract for paywalls, commerce services, and data platforms. Understand how the parts connect, choose what your product owns, and give AI the contract to implement it.

Explore the architecture
Your infrastructure. Your partners. No central account. Read the whitepaper

Commerce backend architecture

Select a part to explore it.
Purchase UI
Store SDK
Apple · Google
Meta · Amazon
Store APIs
Notifications
Commerce backendIAPKit or your implementation
REST / GraphQLSigned webhooks
Login + access control
App → your backend: authenticated session + purchase evidence
Defines the interfaces and behavior between these systems.
Explore the wider ecosystemPaywalls, commerce services, and data platforms
The big picture

One ecosystem. Your part in it.

Choose your business. Explore the roles you need.

App + backend
Signed events
Your app connects the piecesOpenIAP client SDK → store purchase → your authenticated backend
Shared contracts

Own one role or combine them. Your app keeps login and access control; partners can supply the rest. Follow one purchase through the system →

See a subscription in actionPurchase, access, cancellation, and recovery
Find the specificationAPIs, roles, events, and conformance

Operations · REST · GraphQL · Authentication · Webhooks · Conformance

Normative specification · Authored schema