first AA-native x402 stack
NERO 402 Documentation
Everything you need to integrate the AA-native x402 settlement scheme: quickstarts for buyers and sellers, concept guides, the SDK reference, and the protocol whitepaper.
Where to start
Quickstart for agents
Pay any x402-gated endpoint from a browser tab or a Node script in 30 lines.
Quickstart for merchants
Wrap an existing Express, Hono, Fastify, or Next.js handler with a payment gate.
Install the SDK
Five packages under @nerochain/x402-*. Pick what you need.
The aa-native scheme
What changes from x402's `exact` scheme, and why ERC-4337 accounts need a separate one.
Paymaster sponsorship
How agents pay APIs without holding the chain's native gas asset.
Whitepaper
The protocol's normative specification. Wire format, validation rules, security model.