MailVeri verifies email addresses in real time and in bulk (syntax, domain/MX, SMTP mailbox, disposable and catch-all detection) so cold outreach and signups stay clean. 1,000 free credits with no card, pay-as-you-go from $9 per 10k, credits never expire. REST API (https://mailveri.com/docs/api) and an open-source MCP server (https://github.com/mailveri/mailveri-mcp).