MachineMail
MachineMail is an email API for AI agents: free inboxes on demand, a hosted MCP server and webhooks, and a trust report on every inbound message that strips hidden instructions and tells the agent whether the sender can be believed. Its /v0 API is compatible with AgentMail's.
About MachineMail
What is MachineMail?
An email API for AI agents. Every agent gets its own inbox for free, reads mail over MCP, REST, webhooks, SSE or WebSocket, and every inbound message arrives as agent-safe text with a trust report and level, so nothing in the inbox can hijack the agent.
Key features
- Free inboxes on every plan: named, generated, ephemeral (self-deleting) and catch-all on your own domain
- Trust layer: SPF/DKIM/DMARC, sender history, allow/block lists, link and attachment checks, hidden-text and zero-width removal, classifier for phishing and prompt injection
- Five trust levels: verified, known, unknown, suspicious, quarantined (withheld)
- Hosted MCP server with wait_for_message; works with Claude Code, Cursor, Codex, OpenCode
- Signed webhooks retried for five days, replayable; SSE and WebSocket events
- AgentMail-compatible /v0 API; OpenAPI, CLI, agent skills and plugin (MIT)
- Agents can self-register via auth.md and be claimed with a 6-digit code
Pricing
Free $0 (3,000 messages/mo), Pro $9/mo, Team $49/mo, Scale $199/mo; spam and quarantined mail never billed.
Value & Audience
Value Proposition
Gives every AI agent a free, real email address and a vetted, sanitized view of its mail, so agents can sign up, receive codes and reply without being hijacked by what lands in the inbox.
Problem Solved
Agents need their own inboxes for sign-ups, OTPs and inbound work, but mailboxes are priced per seat and any sender can slip phishing or hidden prompt-injection text in front of the model.
Tech Stack
Social & Links
Loading ratings...
Loading comments...
Gallery
Feedback & Roadmap
MachineMail FAQ
Common questions about MachineMail's features, pricing, and use cases
Is MachineMail free to use?
MachineMail has a free tier plus paid plans, starting at Free - $0 - 3,000 messages/mo (100/day), 1 GB storage, 1 custom domain, 1 seat, unlimited inboxes. Plans listed: Free - $0 - 3,000 messages/mo (100/day), 1 GB storage, 1 custom domain, 1 seat, unlimited inboxes; Pro - $9/mo - 7,500 inbound + 2,500 outbound/mo, 10 GB, 10 custom domains, unlimited seats; overage $1/1K inbound, $0.50/1K outbound; Team - $49/mo - 45,000 inbound + 15,000 outbound/mo, 30 GB, 50 custom domains (Scale $199/mo also available).
What are some alternatives to MachineMail?
Popular AI Agents & Automation alternatives to MachineMail include NeverApply, Harness² and Composio.
MachineMail appears in
You May Also Like
View all alternatives to MachineMail
NeverApply
AI job-search agent that matches jobs, tailors your resume, and auto-applies.
View Product
Harness²
Harness² is an Apache-2.0 research framework from Google Cloud AI Research that automatically refines an LLM agent's harness (prompts, tools, memory, skills and more) for each task and carries lessons forward to future tasks, without changing model weights.
View Product
Composio
Composio connects AI assistants and custom agents to more than 1,500 apps through managed authentication, SDKs and an MCP gateway, and its new Instant tools let agents pay per call for search, scraping, audio and data services from one balance.
View Product
Remove Person from Photo Online Free
Remove person from photo online free: brush photobombers or group extras. Browse & paint free; Google sign-in gives 6 credits (~3 cleans), 2 each.
View ProductOne email a week
TechLogHub tracks 729 tools and 574 open-source projects. Get the week's new launches, release roundups and open-source picks — nothing else.
Get the TechLogHub digest
One email a week: new and trending developer tools, fresh comparisons, and what shipped. Unsubscribe in one click.