Example of custom My Account endpoint.

custom-my-account-endpoint.php

<?php
class My_Custom_My_Account_Endpoint {

	/**
	 * Custom endpoint name.
	 *
	 * @var string
	 */
	public static $endpoint = 'my-custom-endpoint';

	/**
	 * Plugin actions.
	 */
	public function __construct() {
		// Actions used to insert a new endpoint in the WordPress.
		add_action( 'init', array( $this, 'add_endpoints' ) );
		add_filter( 'woocommerce_get_query_vars', array( $this, 'get_query_vars' ), 0 );

		// Change the My Accout page title.
		add_filter( 'the_title', array( $this, 'endpoint_title' ) );

		// Insering your new tab/page into the My Account page.
		add_filter( 'woocommerce_account_menu_items', array( $this, 'new_menu_items' ) );
		add_action( 'woocommerce_account_' . self::$endpoint .  '_endpoint', array( $this, 'endpoint_content' ) );
	}

	/**
	 * Register new endpoint to use inside My Account page.
	 *
	 * @see https://developer.wordpress.org/reference/functions/add_rewrite_endpoint/
	 */
	public function add_endpoints() {
		add_rewrite_endpoint( self::$endpoint, EP_ROOT | EP_PAGES );
	}

	/**
	 * Add new query var.
	 *
	 * @param array $vars
	 * @return array
	 */
	public function get_query_vars( $vars ) {
		$vars[ self::$endpoint ] = self::$endpoint;

		return $vars;
	}

	/**
	 * Set endpoint title.
	 *
	 * @param string $title
	 * @return string
	 */
	public function endpoint_title( $title ) {
		global $wp_query;

		$is_endpoint = isset( $wp_query->query_vars[ self::$endpoint ] );

		if ( $is_endpoint && ! is_admin() && is_main_query() && in_the_loop() && is_account_page() ) {
			// New page title.
			$title = __( 'My Custom Endpoint', 'woocommerce' );

			remove_filter( 'the_title', array( $this, 'endpoint_title' ) );
		}

		return $title;
	}

	/**
	 * Insert the new endpoint into the My Account menu.
	 *
	 * @param array $items
	 * @return array
	 */
	public function new_menu_items( $items ) {
		// Remove the logout menu item.
		$logout = $items['customer-logout'];
		unset( $items['customer-logout'] );

		// Insert your custom endpoint.
		$items[ self::$endpoint ] = __( 'My Custom Endpoint', 'woocommerce' );

		// Insert back the logout item.
		$items['customer-logout'] = $logout;

		return $items;
	}

	/**
	 * Endpoint HTML content.
	 */
	public function endpoint_content() {
		echo '<p>Hello World!</p>';
		// You can load a template here with wc_get_template( 'myaccount/my-custom-endpoint.php' );
	}

	/**
	 * Plugin install action.
	 * Flush rewrite rules to make our custom endpoint available.
	 */
	public static function install() {
		flush_rewrite_rules();
	}
}

new My_Custom_My_Account_Endpoint();

// Flush rewrite rules on plugin activation.
register_activation_hook( __FILE__, array( 'My_Custom_My_Account_Endpoint', 'install' ) );

Are you placing this code inside a theme instead of a plugin? If so, change the last line to:

add_action( 'after_switch_theme', array( 'My_Custom_My_Account_Endpoint', 'install' ) );

If that does not work, try refreshing your permalink structure.

I'm trying the same, but no endpoint action fired. Any idea? I created a plugin with just the code above, activated the plugin, but no action is executed when the user click on the My Stuff link... Also running on the 2.6.1 version

Resolved refreshing permalink structure as @chvillanuevap wrote. Just save Permalink options and your page will start working.

am such a newbie, would you please pack it up in a plugin or something so i can install this since i really don't know how to make use of this code.

very good it is working thank you 💃

How would I insert the content from a WordPress page or redirect them to a WP page instead of echo <p>Hello World!</p>';

It would be nice if my clients could edit that page in the regular WP admin they have access to.

Replace this function and add a template to your theme/woocommerce/myaccount/ folder.

public function endpoint_content() {
		wc_get_template( 'myaccount/my-custom-endpoint.php' );
	}

Can someone tell me what should be the plugin name folder and the name of the file.I tried to create the plugin but its not appearing at all.

Well done ! my plugin is ok. I was in trouble, however the solution was to set priority for this action ;
add_action( 'woocommerce_account_' . self::$endpoint . '_endpoint', array( 'My_Endpoint', 'function_content' ),10 );

Gosh thanks for the code!
You have to re-save your permalink to make it work. However mine looks like this:

Any idea which part of the code are making this?

Great piece of code! Thank you so much for this. One question: How do I add two custom endpoints?

@claudiosanches This example worked.

But I have another problem. I choose My-account as my static root page. The new point show 404 or post page.
Can you suggest away to solve?

Perfect solution with the update by @coldfusion411
I just wanted to add something to the people who are new @WP development:
If you want to make it a plugin, the code should start with:

/*
Plugin Name: My Plugin
Plugin URI: https://www.mydomain.com/my-plugin
description: My description
Version: 1.0
Author: My Name
Author URI: https://www.mydomain.com/about-me
License: GPL2
*/

Great job! How i can change this code to add more than one endpoint page?

This is helpful. Also this is also helpful

However, as @MikeWP says, how to add more than one custom endpoints? I would also like to know this.

When I use this code I cannot use 'my-custom-endpoint' with the function "is_wc_endpoint_url()". Whereas "is_wc_endpoint_url()" works with the core WC endpoints to return a true value (e.g. "is_wc_endpoint_url('orders')" or "is_wc_endpoint_url('edit-address')"), the function returns empty (or false/"0" Boolean) when using 'my-custom-endpoint'. I've also tried other custom endpoints with the same problem.

Does anyone know what additional coding is required of the custom endpoints to be compatible with the "is_wc_endpoint_url" function? I'd really like to be able to utilize this function for conditional logic on custom tabs. Thanks!

Above endpoint is working fine. But now I want to open a new page as woo order listing is working. Please check this link https://nimb.ws/1fn4wa

I want to list all offers and also I want to shoe each offer single details in the my account section. Please advice.

Does not work with conditional

is_wc_endpoint_url('my-custom-endpoint')
returns false

UPD
add this to __construct
add_filter( 'woocommerce_get_query_vars', [ $this, 'add_query_vars' ], 0 );

and change add_query_vars()
to
public function add_query_vars( $vars ) {
$vars[self::$endpoint] = self::$endpoint;

	return $vars;
}