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
- x402 by Coinbase goes live on Arbitrum mainnet - CDP facilitator now covers a fifth chain alongside Base, Polygon, World and Solana · phemex.com
- Jesse Pollak ships batched settlement on x402 - ERC-20 escrow + offchain signed vouchers unlock sub-$0.0001 per-request pricing, directly answering the per-request-settlement bear case · cointelegraph.com
- TACEO ships Confidential x402 on Base Sepolia - 3-party MPC + zk-proofs make every payment private at ~300k gas, 8x cheaper than heavyweight ZK alternatives · finextra.com
- 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