{"endpoint":"/subscribe/price-alert","method":"POST","content_type":"application/json","inputSchema":{"type":"object","required":["webhook_url"],"properties":{"webhook_url":{"type":"string","format":"uri"},"threshold_ct_kwh":{"type":"number"},"threshold_g_kwh":{"type":"number"},"direction":{"type":"string","enum":["above","below"]}},"additionalProperties":false},"requestExample":{"webhook_url":"https://agent.example/webhooks/energy"}}