# LeakCheck API

## Docs

- [Pro lookup](https://docs.leakcheck.io/api-reference/pro-api-v2/pro-lookup.md): Search full breach records by email, username, phone number, domain, hash and more. Requires an [API key](https://docs.leakcheck.io/authentication) passed either in the `X-API-Key` header (recommended) or as the `?key=` query parameter.
- [Public lookup](https://docs.leakcheck.io/api-reference/public-api/public-lookup.md): Free, unauthenticated lookup. Returns which breaches an identifier appears in and which data categories were exposed — never the values themselves. Use the Pro API for full records. Rate limited to 1 request per second.
- [Authentication](https://docs.leakcheck.io/authentication.md): How to authenticate requests to the LeakCheck Pro API v2.
- [Errors & rate limits](https://docs.leakcheck.io/errors.md): Error responses of the LeakCheck API and the request-rate limits that apply.
- [Overview](https://docs.leakcheck.io/overview.md): REST API for searching 10B+ leaked records — emails, usernames, phones, domains and info-stealer logs.
- [Lookup](https://docs.leakcheck.io/pro-api/lookup.md): Query the Pro API v2 for full breach records by email, username, phone, domain and more.
- [Migrate from v1](https://docs.leakcheck.io/pro-api/migrate-from-v1.md): What changed between the legacy API v1 and the Pro API v2.
- [Search types](https://docs.leakcheck.io/pro-api/search-types.md): Everything you can search by with the Pro API v2, and when a type must be set explicitly.
- [Lookup](https://docs.leakcheck.io/public-api/lookup.md): Free breach-source lookups by email, email hash or username — no API key required.
- [CLI tool](https://docs.leakcheck.io/tools/cli.md): Query the LeakCheck API straight from your terminal with the leakcheck command.
- [Python wrapper](https://docs.leakcheck.io/tools/python-wrapper.md): Official Python package for the LeakCheck API — supports both the Pro API v2 and the Public API.

## OpenAPI Specs

- [openapi](https://leakcheck.io/openapi.json)