A side-by-side look at the Voidmail Agent Email and Atomic Mail MCP servers: transport, auth, tools, quality signals, and the config to install either one in Claude, Cursor, Windsurf or VS Code.
Verdict: choose Voidmail Agent Email for communication work as a local process; choose Atomic Mail for communication as a local process. You can also run both side by side in one mcpServers block.
VOIDMAIL_ADDRESS, VOIDMAIL_CREATOR_DID, VOIDMAIL_CREATOR_SIGNING_KEY_FILE.voidmail_create_account, voidmail_account_info, voidmail_list_inbox.Rows where the two servers differ are marked.
| Spec | V Voidmail Agent Email | |
|---|---|---|
| Category | Communication | Communication |
| Quality signal | 53/100 · Good | 45/100 · Fair |
| Install command | Confirmed | Confirmed |
| Transport | Local subprocess (stdio) | Local subprocess (stdio) |
| Auth | other | Not declared |
| Pricing | Not declared | Not declared |
| Required env vars | VOIDMAIL_ADDRESSVOIDMAIL_CREATOR_DIDVOIDMAIL_CREATOR_SIGNING_KEY_FILE | None listed |
| Verified owner | Community listing | Community listing |
| GitHub stars | 0 | 266 |
| Directory activity | 0 views 0 installs 0 upvotes | 2 views 0 installs 0 upvotes |
| Tools | 19 | Not listed |
| Full listing | View Voidmail Agent Email | View Atomic Mail |
voidmail_create_accountCreate a new @voidmail.ai inbox with an enrolled DID's signed proof; saves both inbox keys to 0600 files and returns only their pathsvoidmail_account_infoGet account detailsvoidmail_list_inboxList emails with pagination and filters; encrypted ones are decrypted herevoidmail_read_emailRead a specific email, decrypting it here if it is encrypted (auto-marks as read)voidmail_search_inboxSearch on this machine across subject, sender, recipients and text; never a server searchvoidmail_sending_limitsRead sending policy without consuming send capacityvoidmail_send_onceSend one authorized message with a saved operation ID and retained statusvoidmail_send_statusRead the same original send without sending againvoidmail_send_emailLegacy send without durable status; prefer `voidmail_send_oncevoidmail_policyRead the recipient and content policy, approved recipients and pending requestsvoidmail_request_recipientAsk the owner to approve a recipient; returns the approval stepvoidmail_revoke_recipientRemove an approved recipient (restricting needs no owner)No tool names declared yet. Check the project README from the listing page.
Paste either block (or both) into your client config, e.g. claude_desktop_config.json or ~/.cursor/mcp.json. We only show a config when the install command is confirmed.
{
"mcpServers": {
"voidmail-agent-email": {
"command": "npx",
"args": [
"-y",
"@voidly/mcp-email@2.0.1"
],
"env": {
"VOIDMAIL_ADDRESS": "YOUR_VOIDMAIL_ADDRESS_HERE",
"VOIDMAIL_CREATOR_DID": "YOUR_VOIDMAIL_CREATOR_DID_HERE",
"VOIDMAIL_CREATOR_SIGNING_KEY_FILE": "YOUR_VOIDMAIL_CREATOR_SIGNING_KEY_FILE_HERE"
}
}
}
}
{
"mcpServers": {
"atomic-mail": {
"command": "npx",
"args": [
"-y",
"--package=@atomicmail/agent-skill-github",
"atomicmail"
]
}
}
}