By connecting to port 80 on logsene-receiver.sematext.com (or 443, if you want HTTPS), you can use the Elasticsearch API to search through your data, in the same way you can send it.
Logsene comes with its own UI, which integrates nicely with other Sematext apps, such as SPM (see pub-SPM Wiki). You can also use Kibana. Or deploy your own UI or custom scripts.
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Documentation moved to http://sematext.com/docs/logs/searching-your-events/