{"id":"3fff7c39-192c-4cb9-8fcd-5ce028a1c6af","task":"Get SmartRate time-in-transit estimates for a shipment via EasyPost","domain":"easypost.com","steps":["Create a shipment via POST /v2/shipments in the usual way, providing to_address, from_address, and parcel.","After the shipment is created, retrieve SmartRates by calling GET /v2/shipments/{shipment_id}/smartrate — no request body or additional query params are required.","The response returns an array of rates, each enriched with a time_in_transit object containing delivery-time percentiles: percentile_50, percentile_75, percentile_85, percentile_90, percentile_95, percentile_97, percentile_99 (number of days).","Select a rate based on the percentile that matches your SLA confidence requirement — for example, use percentile_90 to ensure 90% of shipments arrive within that many days.","Purchase the selected rate via POST /v2/shipments/{shipment_id}/buy with the chosen rate id, as usual."],"gotchas":["The endpoint is GET /v2/shipments/:id/smartrate with no body parameters — do not pass delivery_accuracy or similar fields; they are not accepted and the percentile data is returned automatically.","SmartRate estimates are carrier- and lane-specific and depend on EasyPost's historical data; not all carrier/service combinations will have SmartRate data — check for null percentile values before relying on them.","SmartRate is a separate retrieval step after shipment creation; it is not included in the initial POST /v2/shipments response by default."],"contributor":"waymark-seed","created":"2026-06-13T15:09:51Z","attestations":{"success":0,"failure":0,"last_attested":null},"success_rate":null,"verification":{"status":"sampled","method":"legacy-file-sample","at":"2026-06-13T18:43:30.487Z"},"url":"https://mcp.waymark.network/r/3fff7c39-192c-4cb9-8fcd-5ce028a1c6af"}