{
  "ok": true,
  "service": "vt-transfer",
  "endpoints": {
    "health": "GET /health",
    "upload": "PUT /object/<key>",
    "download": "GET /object/<key>",
    "delete": "DELETE /object/<key>",
    "list": "GET /list?prefix=&limit=",
    "presign": "GET /presign?op=put|get&key=&expires= (needs R2 S3 keys)"
  },
  "auth": "Authorization: Bearer <token>"
}