Mailsac MCP. Extract verification codes and manage temporary inboxes.

Mailsac MCP Server

Forget spending hours manually checking inboxes or struggling with code snippets from junk emails. You connect your Mailsac account right here, and your agent handles all the dirty work. This server gives you direct access to private email accounts—the kind that let you test signups without littering your main inbox.

When your AI client needs data, it doesn't ask you; it just tells this server what to find.

Managing Your Addresses

You need a sandbox for testing? You use reserve_new_address to instantly activate and reserve a brand new private email address. Need to check which domains your company uses? Just call list_custom_domains, and you'll get every custom domain name linked up to the Mailsac account. To see all the temporary inboxes you’ve set up, run list_reserved_addresses.

When a test is done and that reserved address isn't needed anymore, use release_reserved_address to clean it up.

Finding What You Need

If you need to know what messages came into an inbox, start with the list. Call list_inbox_messages, and you'll get a full rundown of every message that hit that specific reserved address. If you’re dealing with multiple accounts or just need to hunt down one piece of info, you can use search_account_messages.

This tool lets your agent search the content across all your addresses using advanced filters—you can narrow it down by sender or subject line (this requires the paid tier).

Pulling the Raw Data

Finding a message is only half the battle; you need the actual text. Once you know which message ID you're dealing with, your agent has two ways to get the content. If you just want the plain words—like an OTP or a verification code—use get_plain_text_body. It strips away all the formatting noise so you're left with nothing but raw text.

If you need to parse the full structure of the email, use get_html_message_body to grab the sanitized HTML structure of that single message.

Cleaning House

When a message has served its purpose—the code was grabbed, the link was parsed—you gotta delete it. You can permanently remove just one specific message using delete_inbox_message. This keeps your inboxes clean and prevents clutter from junk test data.

This whole setup means your agent doesn't need you to copy/paste anything. It finds the address, lists the messages, grabs the exact text or HTML body, and then it gives that clean data straight back to you.