Agent Relay alternatives

1

xete

by xetenet

B

End-to-end-encrypted, sovereign inbox for AI agents. The server only ever sees ciphertext.

2

Atomic Mail

by Atomic-Mail

A

Programmable email inbox for AI agents — JMAP, PoW auth, stdio MCP server.

3

Email Inbox API + Sending by Sendmux

by Sendmux

A

AI email inbox and sending tools with attachments, search, live events, and webhooks.

4

Local

by local-mcp.com

C

Let ChatGPT, Claude & Cursor use your Mac: email, calendar, iMessage, Teams, files. Local, free.

5

three.ws Notifications

by nirholas

B

Read the inbox, mark items read, manage delivery preferences, and register Web Push devices.

6

Clippy

by neilberkman

A

Copy AI-generated content to the macOS clipboard: rich Gmail-ready email drafts, text, and files

7

Impreza Host

by imprezahost

B

No-KYC offshore hosting an AI agent runs end-to-end: no-email signup, crypto, VPS, deploy, Tor.

8

Outlook

by rlrghb

A

Outlook & OneDrive MCP: personal & enterprise tools for mail, calendar, contacts, tasks, files

9

smbCloud Mail & Auth

by smbcloudXYZ

A

Email infrastructure and authentication for developers: domains, inbox routes, auth apps, deploys.

10

MCP

by sendsoon

B

Send email, look up public IP information, and convert files to Markdown through SendSoon.

11

AI

by sendsoon

B

Send email, look up public IP information, and convert files to Markdown through SendSoon.

12

Zerosmtp

by msgwing

A

A free SMTP relay that still takes a username and password, for devices that cannot do OAuth 2.0.

13

Radmail

by radmail.ai

A

Email OS for agents - real-inbox search, triage, commitments, and a verifiable BEC hard-stop.

14

agentmailkit

by ariaxhan

A

Run scheduled LLM-written email digests from local files and feeds. Local-first MCP server.

15

Expense

by assaf

A

Receipt tracker with no friction: receipts arrive by email and file themselves

16

Outlook Email Html Lint

by jmshinhwa

A

Classic Outlook renders with the Word engine, the new Outlook with WebView2. Lint one email file aga

17

SMTP

by ni-c

B

MCP server that sends mail over SMTP, gated behind an allowlist and a human confirmation

18

Anima

by anima-labs-ai

B

Give your AI agent an identity it owns: email inbox, US phone number, SMS, voice, and a vault.

19

Agent Email List — Free SMTP Relay for AI Agents

by ai.agentemaillist.com

B

Free transactional email + SMTP relay. Agents self-signup, no API key needed to start.

Outlook mail and OneDrive files via Microsoft Graph — read, search, send and organize.

One identity across Claude Code, Codex, Cursor, Gemini, Windsurf: shared inbox and handoffs.

22

SendSeven Messaging

by sendseven.com

A

Unified messaging MCP server: WhatsApp, Instagram, Telegram, SMS, Messenger & email support inbox