A lightweight way to use environment variables in your Cursor MCP server definitions.
Setup
Choose your client, copy the config, then fill in any required environment variables.
claude mcp add envmcp -- npx envmcp your-mcp-server '$DATABASE_URL'~/.codex/config.toml
[mcp_servers.envmcp]
command = "npx"
args = ["envmcp", "your-mcp-server", "$DATABASE_URL"]
# codex mcp add envmcp -- npx envmcp your-mcp-server '$DATABASE_URL'~/.cursor/mcp.json
{
"mcpServers": {
"envmcp": {
"command": "npx",
"args": [
"envmcp",
"your-mcp-server",
"$DATABASE_URL"
]
}
}
}.vscode/mcp.json
{
"servers": {
"envmcp": {
"type": "stdio",
"command": "npx",
"args": [
"envmcp",
"your-mcp-server",
"$DATABASE_URL"
]
}
}
}~/.gemini/settings.json
{
"mcpServers": {
"envmcp": {
"command": "npx",
"args": [
"envmcp",
"your-mcp-server",
"$DATABASE_URL"
]
}
}
}claude_desktop_config.json
{
"mcpServers": {
"envmcp": {
"command": "npx",
"args": [
"envmcp",
"your-mcp-server",
"$DATABASE_URL"
]
}
}
}.trae/mcp.json
{
"mcpServers": {
"envmcp": {
"command": "npx",
"args": [
"envmcp",
"your-mcp-server",
"$DATABASE_URL"
]
}
}
}