Create a new CardZero wallet. Returns a wallet address and one-time claim key for the human owner. No authentication required.

Check the current USDC balance of your CardZero wallet.

Send a USDC payment to any Ethereum address. A 2% service fee is deducted automatically from your wallet. Confirm amount and recipient with the user before calling.

View recent payment history for your CardZero wallet.

Pay for an x402-protected HTTP resource (HTTP 402 Payment Required). Use after receiving a 402 response. Returns a paymentHeader to include in the retry request as X-PAYMENT header.

Check the status of a specific payment by its ID. No authentication required.

Create a Job that escrows USDC payment until a Provider delivers and an Evaluator approves. Use this for A2A service delivery (vs send_payment for direct transfers). Confirm budget + provider with user first. Provider must have a CardZero wallet (Sprint 9 MVP requirement).

Fund a Job created via create_job. Locks the budget USDC into escrow. Requires that the Job is in 'open' state. Two on-chain operations: USDC.approve(jobs) + Jobs.fund. Status: open → funded.

Submit a deliverable for a Job (Provider side). Posts the deliverable hash on-chain; Evaluator then auto-approves or rejects. Status: funded → submitted.

Get the current state of a Job (status, budget, transactions, evaluation outcome). No authentication required — Job state is public.