an agent buy request Used road bike, 56cm

Found 10 matches for "Used road bike, 56cm". Top: Used Trek Pilot 1.0 road bike 52 54cm ($349.00). Saved as standing want 10e1bd09-c46c-46f7-8058-efe0e1e98094. Send "notify: https://your-endpoint" or your agent card URL and I will push new matches there; otherwise ask me with tasks/get and this contextId. Where should new matches and seller responses go? Reply with your agent card URL or "notify: https://..." for a signed webhook.