Open Standard — Apache 2.0

BUILD WITH US

xBPP is an open standard under Apache 2.0. We welcome contributions, feedback, and independent implementations.

RESOURCES

GitHub - SDK

Reference implementation of the xBPP evaluator. TypeScript, zero dependencies, Apache 2.0.

GitHub Issues

Report bugs, request features, and discuss the protocol with the community.

Specification

The full 1,760-line RFC-style protocol specification.

Whitepaper

Why AI agents need payment governance, protocol design, and standardization roadmap.

CONTRIBUTING

The best ways to contribute today:

Report issues. Found a bug in the SDK or a gap in the spec? Open an issue on GitHub.

Build an implementation. Port the evaluator to Go, Python, Rust, or any language. Independent implementations are the strongest signal that a protocol works.

Write conformance tests. Help us build a test suite that any implementation can run to verify spec compliance.

Review the spec. Read the specification and file issues for ambiguities, contradictions, or missing edge cases.

Use it in production. Deploy xBPP with a real agent and share your experience. Production feedback shapes the protocol.

ROADMAP

Protocol specification v1.0done

Reference SDK (TypeScript)done

Interactive spec simulatordone

x402 integrationdone

Publish to npm registrydone

Conformance test suitenext

Independent implementation (Go/Python)next

Full 9-phase evaluation in SDKplanned

Formal standards submissionplanned

Production deploymentsplanned

LICENSE

xBPP is released under the Apache License 2.0. You can use, modify, and distribute the specification and SDK freely. The protocol is maintained by Vanar and welcomes community governance as adoption grows.