Nonce
A one-time value included in a payment proof to prevent replay attacks against resource servers.
Related terms
- Payment Proof - A signed payment payload submitted with a retried HTTP request authorising the facilitator to settle the required amount on the client's beh
Recent stories
DEV
- Venice launches Venice Skills - x402 bundled into 19-skill agent toolkit for Cursor, Claude Code, Codex, Hermes · github.com
PROTOCOL
- Coinbase Q1 call: 99% of x402 settled in USDC, 90% of agentic stablecoin volume on Base - Choi calls x402 'the open standard for the next wave of agentic commerce' · theglobeandmail.com
- Circle ships Nanopayments on mainnet - gas-free USDC down to $0.000001 across 11 chains, fully x402 v2 compatible · circle.com
- Kite ships mainnet + Agent Passport - first x402-native chain with programmable agent wallets goes live · globenewswire.com
- Utexo enables USDT payments on x402 with near-instant Bitcoin-native settlement · prnewswire.com
- AWS Bedrock integrates x402 - first major cloud provider with native HTTP 402 payment rails for agents · cryptobriefing.com