MCP Server implemented in JavaScript using Node.js that demonstrates how to build an MCP server with a custom prompt and custom tools, including one that loads an environment variable from a configuration file, to integrate seamlessly with AI-assisted environments like Cursor IDE.
Setup
Choose your client, copy the config, then fill in any required environment variables.
claude mcp add in-node-js -- npx @modelcontextprotocol/inspector node ./mcp-server.js~/.codex/config.toml
[mcp_servers.in-node-js]
command = "npx"
args = ["@modelcontextprotocol/inspector", "node", "./mcp-server.js"]
# codex mcp add in-node-js -- npx @modelcontextprotocol/inspector node ./mcp-server.js~/.cursor/mcp.json
{
"mcpServers": {
"in-node-js": {
"command": "npx",
"args": [
"@modelcontextprotocol/inspector",
"node",
"./mcp-server.js"
]
}
}
}.vscode/mcp.json
{
"servers": {
"in-node-js": {
"type": "stdio",
"command": "npx",
"args": [
"@modelcontextprotocol/inspector",
"node",
"./mcp-server.js"
]
}
}
}~/.gemini/settings.json
{
"mcpServers": {
"in-node-js": {
"command": "npx",
"args": [
"@modelcontextprotocol/inspector",
"node",
"./mcp-server.js"
]
}
}
}claude_desktop_config.json
{
"mcpServers": {
"in-node-js": {
"command": "npx",
"args": [
"@modelcontextprotocol/inspector",
"node",
"./mcp-server.js"
]
}
}
}.trae/mcp.json
{
"mcpServers": {
"in-node-js": {
"command": "npx",
"args": [
"@modelcontextprotocol/inspector",
"node",
"./mcp-server.js"
]
}
}
}