> For the complete documentation index, see [llms.txt](https://apidocs.akinon.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://apidocs.akinon.com/commerce-openapis/checkout/shipping-and-delivery/select-a-delivery-time-slot.md).

# Select a delivery time slot

Submits the chosen delivery time window (`lower` and `upper` datetime bounds). The slot is validated to ensure it is still available. On success, the shipping option and shipping amount are calculated and stored in the pre-order, and the delivery range is recorded.

**Required Fields**:

* `lower`: Start of the delivery time window (ISO 8601 datetime with timezone).
* `upper`: End of the delivery time window (ISO 8601 datetime with timezone).

**Validation**:

* The submitted range must still be available according to `SlotService.is_delivery_range_available()`.

**State Update**:

* `pre_order.shipping_option` is set to the first available shipping option.
* `pre_order.shipping_amount` is calculated.
* `pre_order.data['delivery_range']` is set to the selected range.
* If `DELIVERY_BAGS_CONF.auto_run` is enabled, `DeliveryBagsPage` is auto-processed.
* For retail store delivery options, the shipping address is replaced with the retail store address.

**Backward Navigation**:

* When navigating backward, `delivery_range` is reset, `shipping_option` is cleared, and `shipping_amount` is set to `0.00`.

**Next Pages**:

* `PaymentOptionSelectionPage`

```json
{"openapi":"3.1.0","info":{"title":"Overview","version":"1.0.0"},"tags":[{"name":"Shipping & Delivery","description":"# Checkout Shipping & Delivery\n\nConfigure shipping options and collect delivery preferences from your customers. These endpoints cover shipping method selection, delivery time slot selection, retail store and locker pickup, remote price calculation, delivery bags, and SMS notifications.\n\n## Authentication\n\nThese endpoints support both authenticated and anonymous sessions.\n\n- **Authenticated users**: Session cookie (`sessionid`) tracks checkout progress.\n- **Anonymous users**: Guest checkout is available when the `CAN_GUEST_PURCHASE` setting is enabled.\n## Request Format\n\nInclude the following header in all checkout requests:\n\n- **x-requested-with**: `XMLHttpRequest`\n\n## Dynamic Settings\n\nThe following settings are managed at runtime through the admin interface and do not require a server restart.\n\n### CHECKOUT_SHIPPING_OPTION_SELECTION_PAGE\nDetermines which shipping option page is active:\n- `ShippingOptionSelectionPage` — standard shipping options\n- `DataSourceShippingOptionSelectionPage` — options grouped by supplier\n- `AttributeBasedShippingOptionSelectionPage` — options grouped by product attribute\n- `RemoteShippingOptionSelectionPage` — options fetched from an external service\n\n### ATTRIBUTE_KEYS_FOR_ATTRIBUTE_BASED_SHIPPING_OPTION\nRules that determine how basket items are grouped by product attribute when the attribute-based shipping page is active. Rules are evaluated in priority order; the first matching rule determines the grouping key.\n\n### REMOTE_SHIPPING_OPTION_PROVIDER\nExternal service configuration used when `RemoteShippingOptionSelectionPage` is active. Includes the service URL and authentication credentials.\n\n### REMOTE_DELIVERY_OPTION_PROVIDER\nExternal service configuration for fetching delivery options remotely.\n\n### CHECKOUT_RETAIL_STORE_FILTERS\nFiltering options for the retail store list. When `by_stock` is enabled, only stores with available stock for basket items are shown.\n\n### DELIVERY_BAGS_CONF\nConfiguration for the delivery bags step. Set `is_active` to `true` to include the delivery bags page. Controls bag SKU, minimum quantity, and whether the customer can specify a custom quantity.\n\n### REMOTE_PRICE_ATTRIBUTE_KEY\nProduct attribute key indicating that an item requires remote price calculation.\n\n## Static Settings\n\nThe following settings are configured in the server environment and require a restart to take effect.\n\n### AUTOSELECT_SHIPPING\nWhen enabled, if only one shipping option is available after filtering, it is selected automatically and the shipping selection page is skipped.\n\n### CHECKOUT_LIST_RETAIL_STORES\nControls whether retail stores are listed on the store selection page. When disabled, an empty list is returned.\n\n### ORDER_BARCODE_SENT_SMS_EXPIRATION_IN_SECONDS\nMinimum interval in seconds between consecutive SMS sends for the same order. Prevents repeated sends within the cooldown period. Defaults to 1800 seconds (30 minutes)."}],"servers":[{"description":"Akinon Checkout API","url":"https://{commerce_url}","variables":{"commerce_url":{"default":"sandbox.akinon.com"}}}],"paths":{"/orders/checkout/?page=SlotSelectionPage":{"post":{"tags":["Shipping & Delivery"],"operationId":"submitSlotSelectionPage","summary":"Select a delivery time slot","description":"Submits the chosen delivery time window (`lower` and `upper` datetime bounds).\nThe slot is validated to ensure it is still available. On success, the shipping\noption and shipping amount are calculated and stored in the pre-order, and the\ndelivery range is recorded.\n\n**Required Fields**:\n- `lower`: Start of the delivery time window (ISO 8601 datetime with timezone).\n- `upper`: End of the delivery time window (ISO 8601 datetime with timezone).\n\n**Validation**:\n- The submitted range must still be available according to `SlotService.is_delivery_range_available()`.\n\n**State Update**:\n- `pre_order.shipping_option` is set to the first available shipping option.\n- `pre_order.shipping_amount` is calculated.\n- `pre_order.data['delivery_range']` is set to the selected range.\n- If `DELIVERY_BAGS_CONF.auto_run` is enabled, `DeliveryBagsPage` is auto-processed.\n- For retail store delivery options, the shipping address is replaced with the retail store address.\n\n**Backward Navigation**:\n- When navigating backward, `delivery_range` is reset, `shipping_option` is cleared,\n  and `shipping_amount` is set to `0.00`.\n\n**Next Pages**:\n- `PaymentOptionSelectionPage`","parameters":[{"$ref":"#/components/parameters/AjaxRequestHeader"},{"$ref":"#/components/parameters/SessionCookieHeader"}],"requestBody":{"required":true,"content":{"application/x-www-form-urlencoded":{"schema":{"$ref":"#/components/schemas/SlotSelectionPageInput"}}}},"responses":{"200":{"description":"Slot selected or validation error","content":{"application/json":{"schema":{"$ref":"#/components/schemas/CheckoutResponse"}}}}}}}},"components":{"parameters":{"AjaxRequestHeader":{"name":"x-requested-with","in":"header","required":true,"description":"Required header for AJAX requests. 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Must be an ISO 8601 datetime with timezone."}}},"CheckoutResponse":{"type":"object","properties":{"context_list":{"type":"array","items":{"$ref":"#/components/schemas/PageContext"}},"pre_order":{"$ref":"#/components/schemas/PreOrder"},"errors":{"oneOf":[{"type":"object","additionalProperties":{"type":"array","items":{"type":"string"}}},{"type":"null"},{"type":"array","items":{"type":"string"}}]},"template_name":{"type":"string"}}},"PageContext":{"type":"object","properties":{"page_name":{"type":"string","description":"Class name of the page (e.g., \"IndexPage\", \"AddressSelectionPage\")"},"page_slug":{"type":"string","description":"URL-friendly slug for the page"},"page_context":{"type":"object","description":"Page-specific context data","additionalProperties":true}}},"PreOrder":{"type":"object","description":"Pre-order state containing basket, addresses, shipping, payment 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information from BIN lookup","properties":{"bin_number":{"type":"string","description":"Card BIN (first 6-8 digits)"},"card":{"type":"object","description":"Card details from BIN database","properties":{"pk":{"type":"integer"},"name":{"type":"string","description":"Card type name (e.g., \"Visa\", \"Mastercard\")"}}}}},{"type":"null"}]},"redirect_to_three_d":{"oneOf":[{"type":"boolean"},{"type":"null"}]},"delivery_option":{"oneOf":[{"$ref":"#/components/schemas/DeliveryOption"},{"type":"null"}]},"retail_store":{"oneOf":[{"$ref":"#/components/schemas/RetailStore"},{"type":"null"}]},"funds_transfer_bank":{"oneOf":[{"$ref":"#/components/schemas/BankAccount"},{"type":"null"}]},"number":{"oneOf":[{"type":"string","description":"Pre-order/order number"},{"type":"null"}]},"order":{"oneOf":[{"type":"object","description":"Created order (after checkout completion)","properties":{"pk":{"type":"integer"},"number":{"type":"string"},"status":{"type":"string"}}},{"type":"null"}]},"payment_choice":{"oneOf":[{"$ref":"#/components/schemas/PaymentChoice"},{"type":"null"}]},"user_email":{"oneOf":[{"type":"string"},{"type":"null"}]},"phone_number":{"oneOf":[{"type":"string"},{"type":"null"}]},"user_phone_number":{"oneOf":[{"type":"string"},{"type":"null"}]},"gift_box":{"oneOf":[{"type":"object","properties":{"note":{"type":"string"},"gift_video":{"type":"boolean"},"gift_video_notification_sent":{"type":"boolean"},"price":{"type":"string"}}},{"type":"null"}]},"delivery_range":{"oneOf":[{"type":"object","properties":{"lower":{"type":"string","format":"date-time"},"upper":{"type":"string","format":"date-time"}}},{"type":"null"}]},"total_amount_with_interest":{"oneOf":[{"type":"string","pattern":"^\\d+\\.\\d{2}$"},{"type":"null"}]},"is_guest":{"type":"boolean"},"is_post_order":{"type":"boolean"},"data_source_shipping_options":{"oneOf":[{"type":"array","items":{"$ref":"#/components/schemas/DataSourceShippingOptionDetail"}},{"type":"null"}]},"attribute_based_shipping_options":{"oneOf":[{"type":"array","items":{"$ref":"#/components/schemas/PreOrderAttributeBasedShippingOption"}},{"type":"null"}]}}},"Basket":{"type":"object","properties":{"pk":{"type":"integer"},"total_amount":{"type":"string","pattern":"^\\d+\\.\\d{2}$"}}},"Address":{"type":"object","properties":{"pk":{"type":"integer"},"email":{"type":"string"},"phone_number":{"type":"string"},"first_name":{"type":"string"},"last_name":{"type":"string"},"country":{"$ref":"#/components/schemas/Country"},"city":{"$ref":"#/components/schemas/City"},"line":{"type":"string"},"title":{"type":"string"},"township":{"$ref":"#/components/schemas/Township"},"district":{"oneOf":[{"$ref":"#/components/schemas/District"},{"type":"null"}]},"postcode":{"type":"string"},"notes":{"type":"string"},"company_name":{"type":"string"},"tax_office":{"type":"string"},"tax_no":{"type":"string"},"e_bill_taxpayer":{"type":"boolean"},"is_corporate":{"type":"boolean"},"primary":{"type":"boolean"},"identity_number":{"type":"string"}}},"Country":{"type":"object","properties":{"pk":{"type":"integer"},"code":{"type":"string"},"name":{"type":"string"}}},"City":{"type":"object","properties":{"pk":{"type":"integer"},"name":{"type":"string"}}},"Township":{"type":"object","properties":{"pk":{"type":"integer"},"name":{"type":"string"}}},"District":{"type":"object","properties":{"pk":{"type":"integer"},"name":{"type":"string"}}},"ShippingOptionDetail":{"type":"object","description":"Detailed shipping option with calculated amount","properties":{"pk":{"type":"integer"},"name":{"type":"string"},"slug":{"type":"string"},"logo":{"oneOf":[{"type":"string","format":"uri"},{"type":"null"}]},"shipping_amount":{"type":"string","pattern":"^\\d+\\.\\d{2}$"},"description":{"oneOf":[{"type":"string"},{"type":"null"}]},"kwargs":{"type":"object","additionalProperties":true}}},"PaymentOptionDetail":{"type":"object","description":"Detailed payment option with type information","properties":{"pk":{"type":"integer"},"name":{"type":"string"},"slug":{"type":"string"},"payment_type":{"type":"string","enum":["credit_card","funds_transfer","bkm_express","loyalty_money","cash_register","gpay","redirection","stored_card","masterpass","masterpass_rest","credit_payment","pay_later","saved_card","confirmation","b2b","wallet","pay_on_delivery"]},"payment_type_label":{"type":"string"}}},"Installment":{"type":"object","properties":{"pk":{"type":"integer"},"installment_count":{"type":"integer"},"label":{"type":"string"},"price_with_accrued_interest":{"type":"string","pattern":"^\\d+\\.\\d{2}$"},"monthly_price_with_accrued_interest":{"type":"string","pattern":"^\\d+\\.\\d{2}$"}}},"DeliveryOption":{"type":"object","properties":{"pk":{"type":"integer"},"name":{"type":"string"},"delivery_option_type":{"type":"string","enum":["customer","retail_store","pickup_location"]},"is_active":{"type":"boolean"}}},"RetailStore":{"type":"object","properties":{"pk":{"type":"integer"},"name":{"type":"string"},"erp_code":{"type":"string"},"township":{"$ref":"#/components/schemas/Township"},"click_and_collect":{"type":"boolean"},"is_active":{"type":"boolean"}}},"BankAccount":{"type":"object","description":"Bank 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shipping","properties":{"pk":{"type":"integer"},"shipping_amount":{"type":"string","pattern":"^\\d+\\.\\d{2}$"},"shipping_option_name":{"type":"string"},"shipping_option_logo":{"oneOf":[{"type":"string","format":"uri"},{"type":"null"}]},"data_source":{"type":"object","properties":{"pk":{"type":"integer"},"title":{"type":"string"}}},"description":{"oneOf":[{"type":"string"},{"type":"null"}]}}},"PreOrderAttributeBasedShippingOption":{"type":"object","description":"Attribute-based shipping option selected for a product group","properties":{"pk":{"type":"integer"},"shipping_option_name":{"type":"string"},"shipping_option_logo":{"oneOf":[{"type":"string","format":"uri"},{"type":"null"}]},"shipping_amount":{"type":"string","pattern":"^\\d+\\.\\d{2}$"},"product_ids":{"type":"array","items":{"type":"integer"}},"attribute_value":{"type":"string"},"attribute_key":{"oneOf":[{"type":"array","items":{"type":"string"}},{"type":"null"}]}}}}}}
```


---

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