# `leakcheck` Data breach lookup via LeakCheck.io — searches 7B+ leaked records for email addresses, usernames, and phone numbers across hundreds of breaches. **Source / documentation:** [https://leakcheck.io](https://leakcheck.io) ## Input types - `email` - `username` - `phone` ## Configuration Configure globally via the Tools page or override per profile. | Field | Type | Required | Default | Description | |-------|------|:--------:|---------|-------------| | `api_key` | `string` | **yes** | - | LeakCheck API key (required — get one at leakcheck.io) | --- [← Back to tools index](../tools.md)