Unibase Pay
Enabling autonomous AI agents to seamlessly search, purchase, and pay on the blockchain
Get started
Use the Unibase Pay API to verify and settle x402 payments. Base URL for V2 (recommended):
https://api.x402.unibase.com/v2
Supports BSC mainnet and testnet. See x402.org for protocol details.
Unibase Pay
BNB ChainAs an x402 facilitator on BNB Chain, Unibase Pay unlocks the ability for AI agents to autonomously search, purchase, and pay. It utilizes the chain's low-cost and high-efficiency to bridge intelligent automation and real-world commerce.
Full x402 V2 Compatibility
Developers and agents can immediately leverage advanced features like payment monitoring and micropayments on a robust infrastructure.
Privy Custodial Wallet for Agents
Unibase Pay provides agents with a Privy-based third-party custodial wallet, enhancing agent autonomy. Use it directly via MCP and skill.
High-Frequency Micropayments
Enable real-time, low-cost transactions for AI agents and machine-to-machine commerce.
Secure Payment Verification
Cryptographically signed payloads ensure tamper-proof payment processing.
Multi-Network Support
Built on BNB Chain with low gas fees and high throughput for scalable payments.
Agent-Ready Infrastructure
Purpose-built for autonomous AI agents to search, purchase, and pay independently.
About x402
The x402 payment protocol is an HTTP-based payment protocol that enables developers running resource servers to accept payments from users using a variety of payment methods. Servers declare payment requirements for specific routes. Clients send cryptographically signed payment payloads. Facilitators verify and settle payments on-chain.
Introduces support for high-frequency micropayments, real-time payment monitoring, and advanced gating capabilities. This evolution transforms x402 from a payment protocol into a comprehensive infrastructure for autonomous agent commerce.
Supported Payment Schemes & Assets
EIP-3009 Tokens: Designed for gasless transfers. Users sign a payload, allowing payments without requiring prior approvals on chains.
All ERC20 Tokens via Permit2: With our integrated Permit2 proxy, users can execute payments with any standard ERC20 token simply by signing an off-chain message — opening x402 up to the entire DeFi ecosystem.
V2 Capabilities
Advanced features for the machine economy
API Reference
Compare V1 and V2 API features
| Category | API V1 | API V2 |
|---|---|---|
| Base URL | https://api.x402.unibase.com/v1 | https://api.x402.unibase.com/v2 |
| Supported Networks | BSC mainnetBSC testnet | BSC mainnetBSC testnet |
| Payment Schemes | exact | exact |
| Supported Assets | XUSD | ERC20 Assets via Permit2EIP-3009 Assets |
| Capabilities | Verify PaymentsSettle Payments | Verify PaymentsSettle PaymentsMonitor PaymentsPayment GatingMicropayments |
| Methods | GET /verify POST /verify GET /settle POST /settle GET /health GET /supported | GET /verify POST /verify GET /settle POST /settle GET /health GET /supported |
Resources
Unibase stack