MailSlurp documentation agent setup

Title: Crystal documentation
Description: Explore MailSlurp Crystal documentation for inbox, email, SMS, API, SDK, and testing workflows, with related guides and examples.
Canonical URL: https://www.mailslurp.com/docs/tags/crystal/
Markdown URL: https://www.mailslurp.com/docs/tags/crystal.md

Use the Markdown URL as the primary plain-text context for this page. Keep API examples and MailSlurp terminology intact, and prefer the canonical URL when citing this page.