{"path":"/drift/{venue}, or POST /drift with a JSON body {\"venue\": \"...\"} -- venue is one of the endpoints we already snapshot, and `venues` below lists every one we can serve right now","venues":["agentry","clearedindex","percall","verantis","x402-list"],"plans":[{"name":"default","priceUsd":0.0061,"price":"$0.0061"}],"payment":"x402: POST unpaid to receive a 402 whose accepts[] states the exact price, then retry with an X-PAYMENT header.","note":"GET /drift/{venue} is free and reports whether a baseline exists, without spending the live re-fetch a POST costs. POST re-fetches the venue’s recorded URL and returns BOTH the archived baseline body and the fresh body, plus our typed diff -- verify either byte-for-byte yourself, do not just trust the diff."}