SERVER

ZeroSMTP

Rank #12,887

io.github.msgwing/zerosmtp

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

1 version
5 GitHub stars
by msgwing (1 servers)View repository ↗
First listed
Aug 16, 2026
Last publish date
Sep 1, 2026
PURPOSE

What you can do with ZeroSMTP

ZeroSMTP is a Model Context Protocol (MCP) server published by msgwing. It ranks #12,887 of 152,076 active servers on MCP Toplist, and its repository has 5 GitHub stars. ZeroSMTP is listed on Official MCP, with 1 tracked version. It was first listed on Aug 16, 2026 and most recently updated on Sep 1, 2026.

Not verifiedMCP Toplist has not yet written a checked profile for this server, so the paragraph above is assembled from registry data only. The repository README is the authority on what it does.

CAPABILITIES AND LIMITATIONS

What ZeroSMTP can and cannot do

Not verifiedMCP Toplist has not catalogued this server's tools or limitations. The repository README lists them.

REQUIREMENTS

What you need before using ZeroSMTP

DeclaredNo credentialsNo credentials declared

The registry listing declares no required environment variables or authentication. This is declared metadata, not a verified install — the repository README is the authority.

Declared by the Official MCP Registry, last synced Oct 25, 2026. Not independently verified by MCP Toplist.

No runtime, credential or payment requirements are recorded for this server beyond the declaration above.

INSTALLATION AND FIRST TASK

Connect ZeroSMTP and confirm it works

npm package
claude mcp add zerosmtp -- npx -y zerosmtp-mcp
First successful task

After adding the config, ask your client to list this server's tools. A tool list confirms the connection; an empty list or an error means the server did not start or needs credentials.

MAINTENANCE AND EVIDENCE

What changed, and when this was checked

First listed
Aug 16, 2026
Latest version published
Sep 1, 2026
Version history
1 version tracked (below)
Requirements evidence
Declared by the Official MCP Registry, last synced Oct 25, 2026. Not independently verified by MCP Toplist.
Profile checked
Not yet — purpose, capabilities and requirements above come from registry data only
Ranking data as of
Sep 1, 2026
Registry sightings

Do you maintain ZeroSMTP? to correct or enrich this profile.

VERSIONS

Available versions (1)

VersionPublished
1.0.2Sep 1, 2026
STANDING
#12,887of 152,076 active serversTop 10%

Ranks ahead of 139,189 of 152,076 servers on MCP Toplist.

BADGE

Show your rank

Maintain this server? Add the live rank badge to your README — it updates automatically as the leaderboard changes.

MCP Toplist: Top 10% of 152,076
Markdown
[![MCP Toplist](https://mcptoplist.com/badge/io.github.msgwing%2Fzerosmtp.svg)](https://mcptoplist.com/server/io.github.msgwing%2Fzerosmtp)
HTML
<a href="https://mcptoplist.com/server/io.github.msgwing%2Fzerosmtp"><img src="https://mcptoplist.com/badge/io.github.msgwing%2Fzerosmtp.svg" alt="MCP Toplist: Top 10% of 152,076" /></a>

Variants: append ?metric=score or ?metric=stars to the image URL.

FAQ

Frequently asked questions

Who maintains ZeroSMTP?
ZeroSMTP is maintained by msgwing, which publishes 1 MCP server (1 total version) tracked on MCP Toplist.
Is ZeroSMTP listed on the Official MCP Registry?
Yes — ZeroSMTP is listed on the Official MCP Registry.
How many versions does ZeroSMTP have?
MCP Toplist tracks 1 version of ZeroSMTP, most recently published on Sep 1, 2026.
Where can I find the source code for ZeroSMTP?
The source code for ZeroSMTP is hosted at github.com/msgwing/ZeroSMTP.
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