Index a product catalog into Klevu and enable on-site search with HMAC-authenticated API calls

Steps

1. Retrieve your REST API key and REST AUTH key from the Klevu Merchant Center under Store Settings; the REST AUTH key is used to compute the HMAC-SHA384 request signature.
2. For each catalog batch, build the HMAC-SHA384 signature by concatenating the request timestamp and request body, then sign it with your REST AUTH key. Pass the signature in the X-KLEVU-RESTAPIKEY request header along with the timestamp in X-KLEVU-TIMESTAMP.
3. Send a POST request to https://indexing-api.ksearchnet.com/v2/batch with the XML (or JSON) catalog payload; Klevu's indexing API is asynchronous and creates a job per call.
4. Check the job status by polling the returned job ID; once the job completes, your products are indexed and searchable.
5. To serve on-site search, call the Klevu Search REST API with your JS API key (public, safe for client-side use) and the user's search term; results are returned as JSON.