ZeroSMTP
Rank #3,669io.github.msgwing/zerosmtp
A free SMTP relay that still takes a username and password, for devices that cannot do OAuth 2.0.
ZeroSMTP is a Model Context Protocol (MCP) server published by msgwing. It ranks #3,669 of 122,350 servers tracked on MCP Toplist, and its repository has 4 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.
Ranks ahead of 118,681 of 122,350 servers on MCP Toplist.
Use ZeroSMTP
No credentials or required configuration declared — add it to your MCP client and go.
claude mcp add zerosmtp -- npx -y zerosmtp-mcp[mcp_servers.zerosmtp]
command = "npx"
args = ["-y", "zerosmtp-mcp"]Add to ~/.codex/config.toml.
{
"mcpServers": {
"zerosmtp": {
"command": "npx",
"args": [
"-y",
"zerosmtp-mcp"
]
}
}
}Add to claude_desktop_config.json (Settings → Developer → Edit Config).
{
"mcpServers": {
"zerosmtp": {
"command": "npx",
"args": [
"-y",
"zerosmtp-mcp"
]
}
}
}Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (per project).
{
"servers": {
"zerosmtp": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"zerosmtp-mcp"
]
}
}
}Save as .vscode/mcp.json in your workspace.
{
"mcpServers": {
"zerosmtp": {
"command": "npx",
"args": [
"-y",
"zerosmtp-mcp"
]
}
}
}Add to ~/.codeium/windsurf/mcp_config.json.
{
"mcpServers": {
"zerosmtp": {
"command": "npx",
"args": [
"-y",
"zerosmtp-mcp"
]
}
}
}Show your rank
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[](https://mcptoplist.com/server/io.github.msgwing%2Fzerosmtp)<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 5% of 122,350" /></a>Variants: append ?metric=score or ?metric=stars to the image URL.
Listed on 1 registry
msgwing
Available versions (1)
| Version | Published |
|---|---|
| 1.0.2 | Sep 1, 2026 |
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.
Do you run this server?
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