OpenIAP

The standardized protocol for implementing in-app purchases across all platforms

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OpenIAP is a unified specification for in-app purchases across platforms, frameworks, and emerging technologies.

Overview

The OpenIAP specification standardizes IAP implementations to reduce fragmentation and enable consistent behavior across all platforms. This is especially critical in the AI coding era where standardized APIs enable better code generation.

Specifications

The contracts every package and library implements live under specs/. They are publishable, implementation-independent, and never deployed as services:

• Client Protocol — Client purchase API and generated types for six languages.
• Commerce Protocol — Server operations, events, bindings, and conformance.

Packages

This monorepo contains all OpenIAP packages:

• CLI - @hyodotdev/openiap starts an AI implementation brief for your product with openiap init and checks local configuration with openiap doctor. Run npx @hyodotdev/openiap in your project.

• docs - Documentation site at openiap.dev

• google - Android library

• apple - iOS/macOS library

• kit - Open-source purchase validation and entitlement infrastructure for the OpenIAP ecosystem, with a hosted service and dashboard at kit.openiap.dev. Free for every developer under hosted fair-use safeguards.

• mcp-server - IAPKit MCP server, hosted at kit.openiap.dev/mcp for AI coding agents

Libraries

Framework SDK implementations built on top of OpenIAP. These libraries are managed in this monorepo — see discussion #86 for the rationale and migration context.

Documentation

Visit openiap.dev for complete documentation and API reference.

Community

Have a question or need help? Ask in the relevant GitHub Discussions category:

For bug reports, please open an issue.

Sponsors

      

Thank you to Meta and Amazon Developer for supporting OpenIAP. View sponsorship options.

OpenCollective

We also recognize sponsors and backers through OpenCollective. The original react-native-iap collective now supports the broader OpenIAP ecosystem and is managed separately from the main sponsor program.

Sponsors:

Backers:

Become a sponsor | Become a backer

Past supporters

Supported the project before the OpenIAP sponsor program.

    

Contributing

OpenIAP began with the original react-native-iap community and carries that work forward across the broader ecosystem:

See CONTRIBUTING.md for development setup, workflows, and contribution guidelines.