Inboxmcp vs Mailbox MCP
A side-by-side look at the Inboxmcp and Mailbox MCP MCP servers: transport, auth, tools, quality signals, and the config to install either one in Claude, Cursor, Windsurf or VS Code.
I
InboxmcpCommunicationConnect inboxes to your AI, with built-in progress and optional owner-confirmed outgoing email.33EmergingAuth: not declaredVerdict: choose Inboxmcp for communication work; choose Mailbox MCP for communication as a local process. You can also run both side by side in one mcpServers block.
Which MCP server should you choose?
Choose Mailbox MCP when
- You need dedicated capabilities in the Communication domain.
- You prefer a local stdio subprocess transport.
- You have the keys it needs:
MAILBOX_MCP_PASSPHRASE, MAILBOX_MCP_CONFIG_DIR, MAILBOX_MCP_PROFILE. - You want tools like
list_accounts, authenticate, reauth.
Feature & specification comparison
Rows where the two servers differ are marked.
| Spec | I Inboxmcp | |
|---|---|---|
| Category | Communication | Communication |
| Quality signal | 33/100 · Emerging | 57/100 · Good |
| Install command | Not confirmed yet | Confirmed |
| Transport | — | Local subprocess (stdio) |
| Auth | Not declared | Not declared |
| Pricing | Freemium | Not declared |
| Required env vars | None listed | MAILBOX_MCP_PASSPHRASEMAILBOX_MCP_CONFIG_DIRMAILBOX_MCP_PROFILE |
Tools & capabilities
Inboxmcp tools
No tool names declared yet. Check the project README from the listing page.
Mailbox MCP tools 49
list_accountsList configured accountsauthenticateAdd a new accountreauthRe-run OAuth for an existing Gmail account (use when refresh token expires with `invalid_grant`)remove_accountRemove an accountsearch_emailsSearch messages (optional `folder` to scope the search)multi_account_searchRun the same query across every configured account in parallelread_emailRead a messageread_threadRead a conversation thread (Gmail + JMAP)send_emailSend a new email (supports `from`, `attachments`; new recipients need `confirm_new_recipient`)reply_emailReply to a message (supports `from`, `attachments`; extra cc/bcc to new addresses need `confirm_new_recipient`)forward_emailForward a message (supports `from`, `attachments`; other domains need `confirm_external_forward`)create_draftCreate a draft (supports reply drafts via `in_reply_to`, plus `from`, `attachments`)- +37 more on the listing page
Ready-to-paste client configs
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.
Inboxmcp
No confirmed install command for Inboxmcp yet — follow the setup steps linked from its listing page rather than a guessed package name.
Mailbox MCP
{
"mcpServers": {
"mailbox-mcp-2": {
"command": "npx",
"args": [
"-y",
"mailbox-mcp"
],
"env": {
"MAILBOX_MCP_PASSPHRASE": "YOUR_MAILBOX_MCP_PASSPHRASE_HERE",
"MAILBOX_MCP_CONFIG_DIR": "YOUR_MAILBOX_MCP_CONFIG_DIR_HERE",
"MAILBOX_MCP_PROFILE": "YOUR_MAILBOX_MCP_PROFILE_HERE"
}
}
}
}
Frequently asked questions
Inboxmcp is categorized under Communication and uses an install path we have not confirmed yet. Mailbox MCP belongs to Communication and uses a local stdio subprocess. Pick Inboxmcp for communication work and Mailbox MCP for communication.
Copy the mcpServers block from the config section on this page into your client's config (for example claude_desktop_config.json or ~/.cursor/mcp.json), then fully restart the client. Inboxmcp has no confirmed install command yet — follow its own setup instructions.
Inboxmcp is listed as freemium — a free tier with paid plans. Mailbox MCP has no declared pricing — check the project's own site. If a server needs environment variables such as API keys, define them under the env key in your client's MCP config.
Yes. MCP clients support multiple servers: add inboxmcp-2 and mailbox-mcp-2 as separate keys in the same mcpServers object, and your assistant will call tools from either one.
On AllMCPs, Inboxmcp has a quality signal of 33/100 (Emerging) with 0 views, 0 installs and 0 GitHub stars. Mailbox MCP has 57/100 (Good) with 2 views, 0 installs and 8 GitHub stars.