Rest API : save a value for later use for reasonable number of concurrent users

• I have a challenge in which i need to save a value and use it later for concurrent users.
• I have tried by using $request->ip() to store in DB and can retrieve--> Failed since its not in same network
• Browsed and found one more solution with Session and Cookie --> Failed since its rest API
• Tried apc_store cache method in php --> giving error undefined method in php 7 (laravel 7)

Save Value : This endpoint should allow the user to save a value for later use.

Method: POST

Endpoint: /save

Body: {"value": 12}

Response : {"save": true}

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Retrieve Value This endpoint should return the saved value

Method: GET

Endpoint: /savedValue

Response : {"value": 12}]

Can anyone give me a solution for this please

via Chebli Mohamed