Reimagining LDAP for Node.js


ldapjs is a pure JavaScript, from-scratch framework for implementing LDAP clients and servers in Node.js. It is intended for developers used to interacting with HTTP services in node and restify.

const ldap = require('ldapjs');

const server = ldap.createServer();'o=example', (req, res, next) => {
  const obj = {
    dn: req.dn.toString(),
    attributes: {
      objectclass: ['organization', 'top'],
      o: 'example'

  if (req.filter.matches(obj.attributes))


server.listen(1389, () => {
  console.log('LDAP server listening at %s', server.url);

Try hitting that with:

$ ldapsearch -H ldap://localhost:1389 -x -b o=example objectclass=*


ldapjs implements most of the common operations in the LDAP v3 RFC(s), for both client and server. It is 100% wire-compatible with the LDAP protocol itself, and is interoperable with OpenLDAP and any other LDAPv3-compliant implementation. ldapjs gives you a powerful routing and "intercepting filter" pattern for implementing server(s). It is intended that you can build LDAP over anything you want, not just traditional databases.

Getting started

$ npm install ldapjs

If you're new to LDAP, check out the guide. Otherwise, the API documentation is:

Section Content
Server API Reference for implementing LDAP servers.
Client API Reference for implementing LDAP clients.
DN API API reference for the DN class.
Filter API API reference for LDAP search filters.
Error API Listing of all ldapjs Error objects.
Examples Collection of sample/getting started code.

More information

What's not in the box?

Since most developers and system(s) adminstrators struggle with some of the esoteric features of LDAP, not all features in LDAP are implemented here. Specifically:

There are a few others, but those are the "big" ones.