← Back to the blog Tutorial 
Build a price monitor with Node.js
A production-minded flow using environment variables, timeouts, and sticky sessions.
· 10 min · ProxyAPI
01
Keep the connection configurable
Read the API key from the environment and build the proxy URL once. Secrets should never be committed or written to application logs.
const key = process.env.PROXYAPI_KEY;
const proxyUrl = `https://${key}-country-se-type-isp:@proxy.proxyapi.se:443`;02
Schedule responsibly
Spread runs over time, cache unchanged results, and back off on 429 or 5xx responses. Monitoring should reduce unnecessary traffic, not create more.