"author:dammy" matching MCP servers:

Near-term paid hop: JSON Schema draft/validate (transform.json_schema ≈ $0.02; unpaid tools/call → HTTP 402, x402 USDC on Base). Receipt→JSON (parse.receipt ≈ $0.10) remains demo/depth. Discover tools free via tools/list; pay per tools/call with x402 USDC on Base (default). Prepaid fiat packs closed; existing balances still debit. Fail-closed.