Local MCP vs Sendmux Sdk
A side-by-side look at the Local MCP and Sendmux Sdk MCP servers: transport, auth, tools, quality signals, and the config to install either one in Claude, Cursor, Windsurf or VS Code.
Verdict: choose Local MCP for communication work as a local process; choose Sendmux Sdk 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 Local 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.
Choose Sendmux Sdk when
- You need dedicated capabilities in the Communication domain.
- You prefer a local stdio subprocess transport.
- Its auth model fits you: API key required.
- You have the keys it needs:
SENDMUX_MCP_SURFACES, SENDMUX_API_KEY, SENDMUX_MAILBOX_API_KEY, SENDMUX_MANAGEMENT_API_KEY, SENDMUX_SENDING_API_KEY, SENDMUX_MCP_TRANSPORT, SENDMUX_MCP_HTTP_BEARER_TOKEN, SENDMUX_MCP_TIMEOUT_SECONDS. - You want tools like
email.send.
Feature & specification comparison
Rows where the two servers differ are marked.
| Spec | ||
|---|---|---|
| Category | Communication | Communication |
| Quality signal | 63/100 · Good | 57/100 · Good |
| Install command | Confirmed | Confirmed |
| Transport | Local subprocess (stdio) | Local subprocess (stdio) |
| Auth | No auth required | API key required |
| Pricing | Free | BYOK (pay the provider) |
| Required env vars | None listed | SENDMUX_MCP_SURFACESSENDMUX_API_KEYSENDMUX_MAILBOX_API_KEYSENDMUX_MANAGEMENT_API_KEYSENDMUX_SENDING_API_KEYSENDMUX_MCP_TRANSPORTSENDMUX_MCP_HTTP_BEARER_TOKENSENDMUX_MCP_TIMEOUT_SECONDS |
| Verified owner | Community listing | Community listing |
| GitHub stars | 73 | 62 |
| Directory activity | 7 views 0 installs 0 upvotes | 3 views 0 installs 0 upvotes |
| Tools | Not listed | 1 |
| Full listing | View Local MCP | View Sendmux Sdk |
Tools & capabilities
Local MCP tools
No tool names declared yet. Check the project README from the listing page.
Sendmux Sdk tools 1
email.send
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.
Local MCP
{
"mcpServers": {
"lanchuske-local-mcp": {
"command": "npx",
"args": [
"-y",
"local-mcp@latest"
]
}
}
}
Sendmux Sdk
{
"mcpServers": {
"sendmux-sendmux-sdk": {
"command": "uvx",
"args": [
"sendmux-mcp"
],
"env": {
"SENDMUX_MCP_SURFACES": "YOUR_SENDMUX_MCP_SURFACES_HERE",
"SENDMUX_API_KEY": "YOUR_SENDMUX_API_KEY_HERE",
"SENDMUX_MAILBOX_API_KEY": "YOUR_SENDMUX_MAILBOX_API_KEY_HERE",
"SENDMUX_MANAGEMENT_API_KEY": "YOUR_SENDMUX_MANAGEMENT_API_KEY_HERE",
"SENDMUX_SENDING_API_KEY": "YOUR_SENDMUX_SENDING_API_KEY_HERE",
"SENDMUX_MCP_TRANSPORT": "YOUR_SENDMUX_MCP_TRANSPORT_HERE",
"SENDMUX_MCP_HTTP_BEARER_TOKEN": "YOUR_SENDMUX_MCP_HTTP_BEARER_TOKEN_HERE",
"SENDMUX_MCP_TIMEOUT_SECONDS": "YOUR_SENDMUX_MCP_TIMEOUT_SECONDS_HERE"
}
}
}
}
Frequently asked questions
Local MCP is categorized under Communication and uses a local stdio subprocess. Sendmux Sdk belongs to Communication and uses a local stdio subprocess. Pick Local MCP for communication work and Sendmux Sdk 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.
Local MCP is listed as free. Auth: no auth required. Sendmux Sdk is bring-your-own-key: usage is billed by the API provider you supply a key for. Auth: api key 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 lanchuske-local-mcp and sendmux-sendmux-sdk as separate keys in the same mcpServers object, and your assistant will call tools from either one.
On AllMCPs, Local MCP has a quality signal of 63/100 (Good) with 7 views, 0 installs and 73 GitHub stars. Sendmux Sdk has 57/100 (Good) with 3 views, 0 installs and 62 GitHub stars.