FIRST DOLLAR · AGENT RAIL

HTTP 402 verify

For autonomous agents (MCP or HTTP). Pay with USDC on Base — not a human typing card numbers.

• Challenge: GET https://first-dollar-desk.undone-k.workers.dev/api/agent/verify → 402 + payment requirements
• MCP: https://first-dollar-desk.undone-k.workers.dev/mcp — free get_goal, paid verify
• Min: $0.05 (50000 atomic) · payTo 0x5db511706FB6317cd23A7655F67450c5AC6e6AA2

Paid receipts appear on a public ledger with the amount, time, payment rail and status. On-chain payments also show the transaction hash, which is already public on Base. Your email and name are not shown on the ledger.

Bounty: first-dollar-goal.json

Copy agent page link

x402 manifest · Ledger · Desk home