MCP server for Send16 — 79 tools that let AI agents (Claude, Cursor, ...) send transactional & marketing email, manage contacts/automations/webhooks, with a zero-DNS sandbox sender.
Setup
Choose your client, copy the config, then fill in any required environment variables.
Local
claude mcp add send16 --env SEND16_API_KEY='<SEND16_API_KEY>' -- npx -y send16-mcp~/.codex/config.toml
[mcp_servers.send16]
command = "npx"
args = ["-y", "send16-mcp"]
env = { SEND16_API_KEY = "<SEND16_API_KEY>" }
# codex mcp add send16 --env SEND16_API_KEY='<SEND16_API_KEY>' -- npx -y send16-mcp~/.cursor/mcp.json
{
"mcpServers": {
"send16": {
"command": "npx",
"args": [
"-y",
"send16-mcp"
],
"env": {
"SEND16_API_KEY": "<SEND16_API_KEY>"
}
}
}
}.vscode/mcp.json
{
"servers": {
"send16": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"send16-mcp"
],
"env": {
"SEND16_API_KEY": "<SEND16_API_KEY>"
}
}
}
}~/.gemini/settings.json
{
"mcpServers": {
"send16": {
"command": "npx",
"args": [
"-y",
"send16-mcp"
],
"env": {
"SEND16_API_KEY": "<SEND16_API_KEY>"
}
}
}
}claude_desktop_config.json
{
"mcpServers": {
"send16": {
"command": "npx",
"args": [
"-y",
"send16-mcp"
],
"env": {
"SEND16_API_KEY": "<SEND16_API_KEY>"
}
}
}
}.trae/mcp.json
{
"mcpServers": {
"send16": {
"command": "npx",
"args": [
"-y",
"send16-mcp"
],
"env": {
"SEND16_API_KEY": "<SEND16_API_KEY>"
}
}
}
}Remote
claude mcp add --transport http send16 https://mcp.send16.com/mcp~/.codex/config.toml
[mcp_servers.send16]
url = "https://mcp.send16.com/mcp"
# codex mcp add send16 --url https://mcp.send16.com/mcp~/.cursor/mcp.json
{
"mcpServers": {
"send16": {
"url": "https://mcp.send16.com/mcp"
}
}
}.vscode/mcp.json
{
"servers": {
"send16": {
"type": "http",
"url": "https://mcp.send16.com/mcp"
}
}
}~/.gemini/settings.json
{
"mcpServers": {
"send16": {
"httpUrl": "https://mcp.send16.com/mcp"
}
}
}claude_desktop_config.json · Customize › Connectors › Add custom connector
{
"mcpServers": {
"send16": {
"command": "npx",
"args": [
"-y",
"mcp-remote",
"https://mcp.send16.com/mcp"
]
}
}
}.trae/mcp.json
{
"mcpServers": {
"send16": {
"url": "https://mcp.send16.com/mcp"
}
}
}Environment variables
SEND16_API_KEY
Replace the placeholders with your own credentials and keep them out of version control.