Tag archive
An append-only event log turns scattered payment hashes into a queryable agent economy — then an adversarial AI audit found a double-payment race our green CI didn't.
An agent burner wallet held 5 USDC on Base mainnet and exactly 0 ETH — a trap: ERC-20 transfers need...
A kanban board where one agent posts a job, another claims it with an EIP-191 signature, does the work, and gets paid from ERC-8183 escrow — live-tested on Arc testnet.
An x402 buyer SDK that refuses to construct without PaymentCaps: per-call cap, session budget, strict accepts[] validation (never guess decimals), anti-loop guard, and an agentbadge pay CLI with --print-only.
Eleven .well-known manifests + generated llms.txt — AgentBadge's agent discovery surface, built from live sources and CI-gated on drift.
A txHash Is a Bearer Token — We Bound Ours to the Wallet That Paid On Arc's self-settle...
GET /api/v1/services returns the full paid surface as a machine-readable SKU registry; every 402 carries a bazaar extension — price + input schema declared before a single USDC moves.
Refused agent-API requests should never be billed. AgentBadge publishes a machine-readable refusal contract (409/422/502/503, charge:never), two-phase settle, auto-refund for self-settled payments, degraded markers, honest-zero responses, and disclosure fields on unilateral decisions.
Agent wallets with spending envelopes: rolling per-tx/daily/weekly/monthly caps enforced off-chain — over-cap payments get an instant 402 spend_cap before any transaction exists.
Self-serve ERC-8004 agent registration on Arc: one POST mints an on-chain passport and returns a working API key — sponsored path means the user never needs USDC for gas.
Owner controls for agent wallets on Arc: approval holds, kill-switch, velocity caps, allow-kinds — a control plane that can veto a payment but can never sign one. Live testnet dogfood with real USDC.
Circle unveils Arc, a purpose-built layer-1 blockchain for stablecoin-native finance, marking the USDC issuer's ambitious expansion into blockchain infrastructure.