SERVER

Atomic Mail

Rank #2,176

io.github.Atomic-Mail/mcp

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

22 versions

262 GitHub stars

by Atomic-Mail (5 servers)View repository ↗

First listed

Jun 11, 2026

Last publish date

Sep 18, 2026

PURPOSE

What you can do with Atomic Mail

Atomic Mail is a Model Context Protocol (MCP) server published by Atomic-Mail. It ranks #2,176 of 151,203 active servers on MCP Toplist, and its repository has 262 GitHub stars. Atomic Mail is listed on Official MCP, with 22 tracked versions. It was first listed on Jun 11, 2026 and most recently updated on Sep 18, 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 Atomic Mail 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 Atomic Mail

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.

MCP Toplist probed the public endpoint on Oct 21, 2026 and could not complete the MCP handshake (jsonrpc error). Requirements remain unverified.

Declared by the Official MCP Registry, last synced Oct 23, 2026. Not independently verified by MCP Toplist.

Declared in the registry install config

ATOMIC_MAIL_CREDENTIALS_DIR · optional
ATOMIC_MAIL_API_KEY · optional
ATOMIC_MAIL_AUTH_URL · optional
ATOMIC_MAIL_API_URL · optional
ATOMIC_MAIL_INBOX_DOMAIN · optional

Hosted endpoint declared as public.

INSTALLATION AND FIRST TASK

Connect Atomic Mail and confirm it works

Remote · HTTP

claude mcp add --transport http atomic-mail https://mcp.atomicmail.ai/mcp

npm package

claude mcp add atomic-mail -e "ATOMIC_MAIL_CREDENTIALS_DIR=<your ATOMIC_MAIL_CREDENTIALS_DIR>" -e "ATOMIC_MAIL_API_KEY=<your ATOMIC_MAIL_API_KEY>" -e "ATOMIC_MAIL_AUTH_URL=<your ATOMIC_MAIL_AUTH_URL>" -e "ATOMIC_MAIL_API_URL=<your ATOMIC_MAIL_API_URL>" -e "ATOMIC_MAIL_INBOX_DOMAIN=<your ATOMIC_MAIL_INBOX_DOMAIN>" -- npx -y @atomicmail/mcp-modelcontextprotocol

Replace each placeholder with your own value before saving.

Remote · HTTP

[mcp_servers.atomic-mail]
url = "https://mcp.atomicmail.ai/mcp"

Add to ~/.codex/config.toml.

npm package

[mcp_servers.atomic-mail]
command = "npx"
args = ["-y", "@atomicmail/mcp-modelcontextprotocol"]

[mcp_servers.atomic-mail.env]
ATOMIC_MAIL_CREDENTIALS_DIR = "<your ATOMIC_MAIL_CREDENTIALS_DIR>"
ATOMIC_MAIL_API_KEY = "<your ATOMIC_MAIL_API_KEY>"
ATOMIC_MAIL_AUTH_URL = "<your ATOMIC_MAIL_AUTH_URL>"
ATOMIC_MAIL_API_URL = "<your ATOMIC_MAIL_API_URL>"
ATOMIC_MAIL_INBOX_DOMAIN = "<your ATOMIC_MAIL_INBOX_DOMAIN>"

Add to ~/.codex/config.toml. Replace each placeholder with your own value before saving.

Remote · HTTP

https://mcp.atomicmail.ai/mcp

Settings → Connectors → “Add custom connector”, then paste this URL.

npm package

{
  "mcpServers": {
    "atomic-mail": {
      "command": "npx",
      "args": [
        "-y",
        "@atomicmail/mcp-modelcontextprotocol"
      ],
      "env": {
        "ATOMIC_MAIL_CREDENTIALS_DIR": "<your ATOMIC_MAIL_CREDENTIALS_DIR>",
        "ATOMIC_MAIL_API_KEY": "<your ATOMIC_MAIL_API_KEY>",
        "ATOMIC_MAIL_AUTH_URL": "<your ATOMIC_MAIL_AUTH_URL>",
        "ATOMIC_MAIL_API_URL": "<your ATOMIC_MAIL_API_URL>",
        "ATOMIC_MAIL_INBOX_DOMAIN": "<your ATOMIC_MAIL_INBOX_DOMAIN>"
      }
    }
  }
}

Add to claude_desktop_config.json (Settings → Developer → Edit Config). Replace each placeholder with your own value before saving.

Remote · HTTP

{
  "mcpServers": {
    "atomic-mail": {
      "url": "https://mcp.atomicmail.ai/mcp"
    }
  }
}

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (per project).

npm package

{
  "mcpServers": {
    "atomic-mail": {
      "command": "npx",
      "args": [
        "-y",
        "@atomicmail/mcp-modelcontextprotocol"
      ],
      "env": {
        "ATOMIC_MAIL_CREDENTIALS_DIR": "<your ATOMIC_MAIL_CREDENTIALS_DIR>",
        "ATOMIC_MAIL_API_KEY": "<your ATOMIC_MAIL_API_KEY>",
        "ATOMIC_MAIL_AUTH_URL": "<your ATOMIC_MAIL_AUTH_URL>",
        "ATOMIC_MAIL_API_URL": "<your ATOMIC_MAIL_API_URL>",
        "ATOMIC_MAIL_INBOX_DOMAIN": "<your ATOMIC_MAIL_INBOX_DOMAIN>"
      }
    }
  }
}

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (per project). Replace each placeholder with your own value before saving.

Remote · HTTP

{
  "servers": {
    "atomic-mail": {
      "type": "http",
      "url": "https://mcp.atomicmail.ai/mcp"
    }
  }
}

Save as .vscode/mcp.json in your workspace.

npm package

{
  "servers": {
    "atomic-mail": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@atomicmail/mcp-modelcontextprotocol"
      ],
      "env": {
        "ATOMIC_MAIL_CREDENTIALS_DIR": "<your ATOMIC_MAIL_CREDENTIALS_DIR>",
        "ATOMIC_MAIL_API_KEY": "<your ATOMIC_MAIL_API_KEY>",
        "ATOMIC_MAIL_AUTH_URL": "<your ATOMIC_MAIL_AUTH_URL>",
        "ATOMIC_MAIL_API_URL": "<your ATOMIC_MAIL_API_URL>",
        "ATOMIC_MAIL_INBOX_DOMAIN": "<your ATOMIC_MAIL_INBOX_DOMAIN>"
      }
    }
  }
}

Save as .vscode/mcp.json in your workspace. Replace each placeholder with your own value before saving.

Remote · HTTP

{
  "mcpServers": {
    "atomic-mail": {
      "serverUrl": "https://mcp.atomicmail.ai/mcp"
    }
  }
}

Add to ~/.codeium/windsurf/mcp_config.json.

npm package

{
  "mcpServers": {
    "atomic-mail": {
      "command": "npx",
      "args": [
        "-y",
        "@atomicmail/mcp-modelcontextprotocol"
      ],
      "env": {
        "ATOMIC_MAIL_CREDENTIALS_DIR": "<your ATOMIC_MAIL_CREDENTIALS_DIR>",
        "ATOMIC_MAIL_API_KEY": "<your ATOMIC_MAIL_API_KEY>",
        "ATOMIC_MAIL_AUTH_URL": "<your ATOMIC_MAIL_AUTH_URL>",
        "ATOMIC_MAIL_API_URL": "<your ATOMIC_MAIL_API_URL>",
        "ATOMIC_MAIL_INBOX_DOMAIN": "<your ATOMIC_MAIL_INBOX_DOMAIN>"
      }
    }
  }
}

Add to ~/.codeium/windsurf/mcp_config.json. Replace each placeholder with your own value before saving.

Remote · HTTP

{
  "mcpServers": {
    "atomic-mail": {
      "url": "https://mcp.atomicmail.ai/mcp"
    }
  }
}

npm package

{
  "mcpServers": {
    "atomic-mail": {
      "command": "npx",
      "args": [
        "-y",
        "@atomicmail/mcp-modelcontextprotocol"
      ],
      "env": {
        "ATOMIC_MAIL_CREDENTIALS_DIR": "<your ATOMIC_MAIL_CREDENTIALS_DIR>",
        "ATOMIC_MAIL_API_KEY": "<your ATOMIC_MAIL_API_KEY>",
        "ATOMIC_MAIL_AUTH_URL": "<your ATOMIC_MAIL_AUTH_URL>",
        "ATOMIC_MAIL_API_URL": "<your ATOMIC_MAIL_API_URL>",
        "ATOMIC_MAIL_INBOX_DOMAIN": "<your ATOMIC_MAIL_INBOX_DOMAIN>"
      }
    }
  }
}

Replace each placeholder with your own value before saving.

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: Jun 11, 2026
Latest version published: Sep 18, 2026
Version history: 22 versions tracked (below)
Requirements evidence: MCP Toplist probed the public endpoint on Oct 21, 2026 and could not complete the MCP handshake (jsonrpc error). Requirements remain unverified.
Profile checked: Not yet — purpose, capabilities and requirements above come from registry data only
Ranking data as of: Sep 18, 2026

Registry sightings

Official MCP ↗listed since Jun 11, 2026 · still listed

Do you maintain Atomic Mail? to correct or enrich this profile.

VERSIONS

Available versions (22)

Version	Published
0.3.27	Sep 18, 2026
0.3.26	Aug 7, 2026
0.3.25	Jul 29, 2026
0.3.24	Jul 2, 2026
0.3.23	Jun 24, 2026
0.3.22	Jun 23, 2026
0.3.20-rc1	Jun 19, 2026
0.3.19	Jun 19, 2026
0.3.18	Jun 19, 2026
0.3.17-rc3	Jun 19, 2026
0.3.17-rc2	Jun 19, 2026
0.3.17-rc1	Jun 19, 2026
0.3.15	Jun 19, 2026
0.3.14	Jun 17, 2026
0.3.13	Jun 17, 2026
0.3.12	Jun 16, 2026
0.3.11	Jun 15, 2026
0.3.10	Jun 15, 2026
0.3.9	Jun 11, 2026
0.3.8	Jun 11, 2026
0.3.7	Jun 11, 2026
0.3.6	Jun 11, 2026

STANDING

#2,176of 151,203 active serversTop 5%

Ranks ahead of 149,027 of 151,203 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.

Markdown

[![MCP Toplist](https://mcptoplist.com/badge/io.github.Atomic-Mail%2Fmcp.svg)](https://mcptoplist.com/server/io.github.Atomic-Mail%2Fmcp)

HTML

<a href="https://mcptoplist.com/server/io.github.Atomic-Mail%2Fmcp"><img src="https://mcptoplist.com/badge/io.github.Atomic-Mail%2Fmcp.svg" alt="MCP Toplist: Top 5% of 151,203" /></a>

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

FAQ

Frequently asked questions

Who maintains Atomic Mail?: Atomic Mail is maintained by Atomic-Mail, which publishes 5 MCP servers (22 total versions) tracked on MCP Toplist.
Is Atomic Mail listed on the Official MCP Registry?: Yes — Atomic Mail is listed on the Official MCP Registry.
How many versions does Atomic Mail have?: MCP Toplist tracks 22 versions of Atomic Mail, most recently published on Sep 18, 2026.
Where can I find the source code for Atomic Mail?: The source code for Atomic Mail is hosted at github.com/Atomic-Mail/atomic-mail-agentic.

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