Smails vs Zerodrop MCP
A side-by-side look at the Smails and Zerodrop MCP MCP servers: transport, auth, tools, quality signals, and the config to install either one in Claude, Cursor, Windsurf or VS Code.
Verdict: choose Smails for communication work as a local process; choose Zerodrop 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 Smails when
- You need dedicated capabilities in the Communication domain.
- You prefer a local stdio subprocess transport.
Choose Zerodrop MCP when
- You need dedicated capabilities in the Communication domain.
- You prefer a local stdio subprocess transport.
- Its auth model fits you: No auth required.
- You have the keys it needs:
ZERODROP_API_KEY, ZERODROP_BASE_URL. - You want tools like
generate_inbox, wait_for_email, check_inbox.
Feature & specification comparison
Rows where the two servers differ are marked.
| Spec | ||
|---|---|---|
| Category | Communication | Communication |
| Quality signal | 44/100 · Fair | 56/100 · Good |
| Install command | Confirmed | Confirmed |
| Transport | Local subprocess (stdio) | Local subprocess (stdio) |
| Auth | Not declared | No auth required |
| Pricing | Not declared | Freemium |
| Required env vars | None listed | ZERODROP_API_KEYZERODROP_BASE_URL |
| Verified owner | Community listing | Community listing |
| GitHub stars | 38 | 0 |
| Directory activity | 1 views 0 installs 0 upvotes | 2 views 0 installs 0 upvotes |
| Tools | Not listed | 3 |
| Full listing | View Smails | View Zerodrop MCP |
Tools & capabilities
Smails tools
No tool names declared yet. Check the project README from the listing page.
Zerodrop MCP tools 3
generate_inboxGenerate a disposable email inbox for testing signups, OTP verification, magic links, and password resets. Instant and local — no network request. Use the returned address wherever an email is required, then call wait_for_email to read what arrives. Free tier: 30-minute retention, no signup needed.wait_for_emailWait for an email to arrive in a ZeroDrop inbox and return it with the OTP and magic link already extracted — no parsing needed. Blocks until an email matching the filters arrives or the timeout is reached. Use after triggering a signup, login, or password-reset flow.check_inboxCheck a ZeroDrop inbox right now without waiting. Returns the most recent emails with OTPs and magic links already extracted, or an empty list if nothing has arrived yet.
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.
Smails
{
"mcpServers": {
"smails": {
"command": "npx",
"args": [
"-y",
"@smails/cli"
]
}
}
}
Zerodrop MCP
{
"mcpServers": {
"zerodrop-dev-zerodrop-mcp": {
"command": "npx",
"args": [
"-y",
"zerodrop-mcp"
],
"env": {
"ZERODROP_API_KEY": "YOUR_ZERODROP_API_KEY_HERE",
"ZERODROP_BASE_URL": "YOUR_ZERODROP_BASE_URL_HERE"
}
}
}
}
Frequently asked questions
Smails is categorized under Communication and uses a local stdio subprocess. Zerodrop MCP belongs to Communication and uses a local stdio subprocess. Pick Smails for communication work and Zerodrop 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.
Smails has no declared pricing — check the project's own site. Zerodrop MCP is listed as freemium — a free tier with paid plans. Auth: no auth required. 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 smails and zerodrop-dev-zerodrop-mcp as separate keys in the same mcpServers object, and your assistant will call tools from either one.
On AllMCPs, Smails has a quality signal of 44/100 (Fair) with 1 views, 0 installs and 38 GitHub stars. Zerodrop MCP has 56/100 (Good) with 2 views, 0 installs and 0 GitHub stars.