New tool2026-11-02via Product HuntAI Agents That Do Tasks for You

MachineMail

Name: MachineMail
Author: MachineMail

MachineMail is an email API for AI agents that gives each agent its own inbox, tags every incoming message with a trust level, and lets agents read and wait on mail through an MCP server or webhooks.

Visit MachineMail ↗

FreemiumProprietary service (agent plugin on GitHub is MIT)REST API / MCP serverby MachineMail (unverified)

Why it matters

For developers whose agents need to sign up for services, catch one-time codes or handle email intake. It aims to stop phishing and hidden prompt-injection text in emails from steering the agent.

Highlights

Unlimited inboxes on every plan, created by API or automatically through a catch-all custom domain, with optional expiry for throwaway addresses.
Each inbound message gets a trust report built from SPF, DKIM and DMARC, allow and block lists, prior correspondence, link and attachment checks and a classifier, and one of five levels from verified to quarantined.
Hidden instructions are stripped from mail before the agent reads it, according to the site.unverified
A Streamable HTTP MCP server works with Claude Code, Codex, OpenCode and other clients, including a wait_for_message call that holds open for up to a minute.
Signed webhooks are retried for five days and can be replayed from the dashboard.

Taken from the project's own README, docs or launch page. Claims about speed or accuracy are the maker's unless stated otherwise.

Try it if: Your agent keeps getting stuck at email verification codes, or you want it to process an inbox without trusting every sender.

Worth knowing: Agents can register themselves and get a sandbox inbox before you claim them with a six-digit code, so check what your agent is allowed to sign up for. All mail passes through MachineMail's servers.

Quick facts

Pricing	Free: 3,000 messages/month (100/day), 1 GB, 1 domain. Pro $9/mo, Team $49/mo, Scale $199/mo; overage $1 per 1,000 inbound, $0.50 per 1,000 outbound recipients
Free or paid	Freemium
License	Proprietary service (agent plugin on GitHub is MIT)
Language	REST API / MCP server
Platform	Hosted service; any MCP client
GitHub stars	n/a (not a GitHub project)
Maker	MachineMailnot verified

Related ranking

See how established tools compare in Best AI Agents That Do Tasks for You. New releases aren't scored until we review them against the rubric.

What we couldn't verify

highlights[2] (prompt-injection stripping is the maker's claim, not tested)
quick_facts.maker (company details not checked)

Checked 2026-11-03 from the tool's own pages. Prices and star counts change, so confirm on the official site. Listing here is not a ranking or an endorsement.