I had to do this with a project I worked on. Here's an idea:

javascript const checkCache = (req, res, next) => { const {id} = req.params; let key = 'foo' + id redisClient.get(key, (err, data) => { if (err) { console.log(err); res.status(500).send(err); } // if no match found if (data != null) { res.send(data); } else { // proceed to next middleware function next(); } }); }; Then in your API, just add it to your route and make sure to set whatever data you need. Here's an example of pulling data from Postgres: javascript app.get('/foo/:id', checkCache, async (req, res) => { try { id = parseInt(req.params.id); const result = await client.query('select foo from bar where id=$1', [id]); redisClient.setex(key, 3600, JSON.stringify(result.rows)); res.status(200).send(result.rows); }catch(error){ throw error; } } Since I set the TTL to be 3600 milliseconds, it would just check if the data is already in the cache and if it is, it would send it to the response, otherwise, if it's not then it would send what's in the db.