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AP2 Roadmap

The development and rollout of the protocol are envisioned in a phased approach, allowing the ecosystem to build, test, and adopt capabilities incrementally.

V0.1: (September 2025) The initial specification focuses on establishing the core architecture and enabling the most common use cases. Key features include: Support for "pull" payment methods (e.g., credit/debit cards) Well-defined data payloads to support transparent accountability based on the VC framework Support for human-present scenarios Support for user and merchant-initiated step-up challenges Detailed sequence diagram and reference implementation using A2A protocol

  • AP2 specifications v0.1 (human present, pull payments)
  • AP2 A2A extension v0.1
  • AP2 MCP server v0.1
  • AP2 python SDK v0.1
  • AP2 android SDK v0.1

V1.x: Subsequent versions will expand the protocol's capabilities based on community feedback and evolving needs. Potential areas of focus include: Full support for "push" payments and all payment methods (e.g., real-time bank transfers, e-wallets etc.) Standardized flows for recurring payments and subscriptions Support for human-not-present scenarios Detailed sequence diagrams for MCP-based implementations

Long-Term Vision: Longer term, we plan the protocol to incorporate more intelligence and flexibility, including: Native support for complex, multi-merchant transaction topologies Support for real-time negotiations between buyer and seller agents We believe that a collaborative approach is essential to creating a protocol that is robust, secure, and meets the diverse needs of the entire ecosystem. We actively seek feedback and critique on the github repository through issues and discussions.