Develop an API to transfer product content to an online store

Now we download product data (product description, feature set, photos) about products in Excel format, inconvenient. We want to develop an API that takes into account that product descriptions (product cards) should be made using category codes, sign codes, and sign codes. The handbook is available. That is, the API should go data to the online store, taking into account all the codes of the directories. Has a more detailed description. It is possible to offer other options for the task.

Development on PHP, full stack is discussed, as is the final budget. The first stage is the development of TK.