JSON API Development for Product Data

I need assistance with the creation of a JSON-based API that can handle product-related data. Ideal candidates should have experience in building this type of API and be familiar with how to secure it using API keys.

Skills and Experience:
- Proven experience in JSON-based API creation
- Familiarity or previous experience with managing product-related data
- Understanding of API security measures, specifically in the implementation of API keys.


Hello,
Unfortunately, I have no idea about creating APIs and no time to think about it. That's why I'm trying to find someone this way.
What do I need for this? Can I run it on my server?
I need the interface asap.
I don't want to hear, yes I can and then nothing happens.
I'm looking for a developer to create an API interface for me that I can run on my server and that requires the access code (ref=XXXX):
Which shows how much data each query point has.
You will receive an Excel file from me.
The first API is for Germany.
It should have an overview of all facilities.
The link to the API should be:
https://travel2fair.de/dialysis/deutschland/?ref=(my access code, 4 digits) without code no query.
Query points for Germany:
Zentrumsname: (engl. Centrumsname)
PLZ: (engl. ZIP)
Ort: (engl. City)
Straße Nr. ( engl. Street houseno.)
Land: (engl. Country)
Telefon: (engl. phone)
E-Mail: (engl. E-Mail)
Anbieter: (engl. Provider)
Breitengrad: (engl. Latitude)
Längengrad:(engl. Longitude)
If I have forgotten something, please let me know.
I already work with very good programmers in India. Who support me with advice and support.
I would like to have a total price.