> 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/account/introduction/authentication.md). # Authentication **Session Authentication (commerceSessionAuth):** All endpoints require session-based authentication. Requests are validated using the session cookie issued after login. **Required Headers:** ``` Cookie: sessionid= ``` #### Domain Glossary **Offer Type:** * `voucher_code`: Single-use promo codes valid for any user * `coupon_code`: Single-use promo codes assigned to specific users * `coupon`: Multi-use promotions assigned to specific users * `sitewide`: Automatic promotions for all users * `external_offer`: Offers originating from external promotion systems **Benefit Type:** * `FIXED`: Fixed amount discount (e.g. 100 TRY off) * `PERCENTAGE`: Percentage discount (e.g. 20% off) * `SHIPPING_FREE`: Free shipping benefit * `SAMPLE_PRODUCT`: Free sample / gift product **Condition Type:** * `QUANTITY`: Minimum quantity requirement * `AMOUNT`: Minimum basket amount requirement * `QUERY`: Custom query-based condition **Offer Status:** * `ACTIVE`: Active and usable * `PASSIVE`: Disabled / inactive * `USED`: Consumed, cannot be reused * `REVOKED`: Revoked / cancelled --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://apidocs.akinon.com/commerce-openapis/account/introduction/authentication.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.