X402 Motion

Pure x402 pay-per-call ground motion — NO account, NO signup, NO API key. An unpaid request (GET or POST) returns HTTP 402 with the x402 v2 challenge (PAYMENT-REQUIRED header + accepts body); retry with a signed PAYMENT-SIGNATURE header (USDC on Base) and the facilitator settles + this returns the full report in the same response. This is the endpoint wallet-bearing agents and x402 directories (x402scan) index.