Your first test

Before integrating the API into your application, verify connectivity with a health check and a simple authenticated request.

1) Smoke test the service

/System/Echo verifies the service is reachable.

const baseUrl = 'https://api.hlc.bike/us/v3.0'
const echoRes = await fetch(`${baseUrl}/System/Echo`)

if (!echoRes.ok) throw new Error(`Echo failed: ${echoRes.status}`)

2) First call (brands)

const apiKey = process.env.HLC_API_KEY

const brandsRes = await fetch(`${baseUrl}/Catalog/Brands`, {
  headers: {
    ApiKey: apiKey,
    language: 'en',
    callerName: 'first-test',
  },
})

if (!brandsRes.ok) throw new Error(`Auth failed: ${brandsRes.status}`)
const brands = await brandsRes.json()

Use case: Add this to CI to block deployments if the API is unreachable or the token is invalid.