I want to add custom php API library under vendor folder and I have added the following folder and files under vendor folder.

  1. magento2_root>vendor/abc/
  2. magento2_root>vendor/abc/abc_php/
  3. magento2_root>vendor/abc/abc_php/composer.json
  4. magento2_root>vendor/abc/abc_php/lib/
  5. magento2_root>vendor/abc/abc_php/lib/Test.php


    "name": "abc/abc_php",
    "type": "library",
    "description": "ABC PHP Client Library",
    "license": "MIT",
    "authors": [
            "name": "Custom Author",
    "require": {
        "php": ">=5.4.0"
    "autoload": {
        "psr-4": {
            "CustomApi\\": "lib"



namespace CustomApi;

class Test
    public function customMethod(){
    return "abc";

When I include this in constructor like following

public function __construct(
\CustomApi\Test $testApi,
// do some logic

It gives me Class CustomApi\Test does not exist error.

PS : I have recompiled the composer by using composer dumpautoload command. It does not generate autoload script in autoload_psr4.php under vendor/composer folder.

Can anyone tell me that what I did wrong ? Any suggestion would be appreciated.


1 Answer 1


After digging whole day continuously, finally I found the solution.

Solution 1 : Add you custom library folder in magento root composer.json like mention below

"autoload": {
        "psr-4": {
            "Magento\\Framework\\": "lib/internal/Magento/Framework/",
            "Magento\\Setup\\": "setup/src/Magento/Setup/",
            "Magento\\": "app/code/Magento/",
            "CustomApi\\": "abc/abc_php/lib" my custom library code
        "psr-0": {
            "": [
        "files": [
        "exclude-from-classmap": [

And recompile the composer by using composer dumpautoload

Solution 2 : Using Packagist. Process is given below

  1. Add your library code to git repository and release.
  2. Add this repository code to http://packagist.org/
  3. install this library via composer directly by command composer require abc/abc_php "1.0.0"

For example, You can check with braintree on git and braintree on packagist.

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