-- Pieverse is committed to building the payment infrastructure that bridges Web2 and Web3. To support this mission, we are extending key web payment standards to the emerging world of blockchain ecosystems where autonomous, crypto-powered agents will routinely handle transactions.
As AI agents become more autonomous, they move from simply processing information to actively participating in the economy. They will need to natively pay for APIs, hire other agents, and purchase services. This creates a foundational challenge: how do you audit, tax, and ensure compliance for transactions run by a machine?
Pieverse is addressing this "AI Accountability Problem" on BNB Chain. We are introducing x402b, an extension of the x402 HTTP payment protocol, designed to be the first payment infrastructure that is not only agent-native but also enterprise-ready and compliant by default.
x402b is built on three pillars: enabling agents to pay, making their payments accountable, and building a framework for the future of continuous AI work.
Pillar 1: Agentic Payment Rails
For an AI agent to be truly autonomous, it can't rely on a human to manually approve every micro-transaction or manage fluctuating gas fees. Payments must be native to their environment: HTTP.
The original x402 standard was a powerful idea, allowing crypto payments via the HTTP 402 "Payment Required" status code. However, it saw limited adoption on the BNB Chain because it lacked a crucial component: a way to bypass gas. Major stablecoins like USDT and USDC don't support EIP-3009, meaning a user (or agent) would still need to hold BNB to pay for gas, breaking the seamless experience.
x402b solves this with pieUSD.
pieUSD is a 1:1 wrapped version of USDT that introduces full EIP-3009 support to BNB Chain. This enables true, gasless payments.
- How it works: An agent (or user) simply signs a payment authorization off-chain. A facilitator submits this authorization and covers the gas fee, and the merchant receives the pieUSD.
- The Result: Agents can now natively pay for services using simple web requests, without ever needing to hold a balance of gas tokens.
Pillar 2: AI Accountability & Compliance
As agents begin to spend money autonomously, normal users, businesses, regulators, and tax authorities will immediately ask critical questions:
- "What did my agent buy? From whom? For how much?"
- "Show me the receipts for all AI-incurred expenses."
- "Provide an immutable audit trail of all autonomous transactions."
This is the "AI Accountability Problem". Standard blockchain payments don't solve this; they show a transaction, not a receipt. The original x402 spec had no standard for receipt generation, tax compliance, or auditable storage.
x402b solves this with the Pieverse Facilitator and its compliance receipt layer.
x402b introduces a compliance layer that automatically generates a verifiable, jurisdiction-aware receipt for every single payment and stores it immutably on BNB Greenfield.
- Automatic & Compliant: Receipts are generated during the payment settlement, with support for US, EU, and APAC formatting and more.
- Immutable Audit Trail: Storing these receipts on Greenfield creates a tamper-proof audit trail that can be retained for compliance (e.g., 5-year audit retention).
- Privacy-Preserving: The system supports tax ID redaction and selective disclosure, balancing transparency with privacy.
This makes x402b transactions tax-compliant by default. For the first time, a business can deploy an AI agent and have a complete, auditable, and immutable bookkeeping trail of its expenses generated automatically.
Pillar 3: The Future is Streaming
The first wave of agent payments will be per-transaction: one API call, one payment. But the true potential of AI involves continuous, long-running tasks—like data processing, market monitoring, or complex reasoning chains.
Enterprises are hesitant to pay large upfront costs for uncertain AI work, preferring usage-based "pay-as-you-go" models, similar to cloud computing.
The x402b framework is the foundation for this future. The next phase of development will focus on streaming payments, allowing agents to "hire" each other by the minute or pay for LLM generation per token. This model reduces risk for the payer—who can stop payment if a service underperforms—and builds a more dynamic, trusted agent-to-agent economy.
How It Works
Under the hood, x402b keeps full backward compatibility with the original x402 flow, adding compliance and storage functionality for BNB Chain.
Simplified Transaction Flow:
1. Client → Resource Server
Sends HTTP request with X-PAYMENT header containing payment + optional compliance metadata.
2. Resource Server → Facilitator
Verifies signature, initiates settlement via /settle.
3. Facilitator → Blockchain
Uses user’s signed authorization to call transferWithAuthorization on the pieUSD contract (gasless).
4. Facilitator → BNB Greenfield (Optional)
Generates and uploads compliance receipt to Greenfield — immutable and audit-proof.
5. Facilitator → Resource Server → Client
Returns standard x402 response, optionally including Greenfield receipt URL.
In simple terms: users sign, facilitators submit, and BNB Greenfield preserves the proof—all in a single, seamless web-native payment flow.
What This Means for BNB Chain
x402b upgrades BNB Chain from a payment-capable blockchain to a compliance-ready payment infrastructure, capable of serving both consumer and enterprise-grade use cases.
1. Real-World Business Integration
Enterprises can now use x402 payments with built-in receipts and audit support.
2. Greenfield Enterprise Use Case
x402b uses Greenfield for secure, long-term storage of compliance receipts—demonstrating its potential for real-world financial data.
3. Enterprise Readiness
Automated receipts, immutable records, and gasless transactions make x402b a foundation for compliant on-chain commerce.
Why It Matters
x402b is more than a payment protocol; it's the foundational layer for a trustworthy, agent-driven economy on the BNB Chain. It directly answers the critical question posed at the beginning: how do we audit, tax, and ensure compliance for transactions run by a machine?
By uniting its three core pillars, x402b provides the complete answer:
- It enables true autonomy with gasless, web-native payments via pieUSD, freeing agents from the friction of blockchain mechanics.
- It ensures inherent accountability by generating a tamper-proof audit trail of jurisdiction-aware receipts for every transaction, stored immutably on BNB Greenfield.
- It builds for the future with a framework designed for streaming payments and continuous agent work.
This transforms BNB Chain from a payment-capable network into the first blockchain with an enterprise-ready, compliance-by-default payment infrastructure. For businesses, this means they can now deploy AI agents with confidence, knowing every expense is automatically recorded for auditors and tax authorities. For the ecosystem, it unlocks a new wave of on-chain commerce, from autonomous SaaS platforms to dynamic agent-to-agent markets, all built on a foundation of transparent and trusted financial infrastructure.
Contact Info:
Name: Colin Ho, Cofounder & CEO
Email: Send Email
Organization: Pieverse Technology Limited
Website: http://pieverse.io
Release ID: 89173880
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