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RESO Web API Open Source Reference Client written in PHP
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The RESO WebAPI Client PHP SDK for PHP allows developers to build applications with RESO API queries for listing data retrieval. For more information on the Real Estate Standards Organization (RESO) please visit or contact Developers wishing to better understand how to use and contribute to our standards visit RESO Developers FAQ.

Specific questions about this repository should be posted to the 'Issues' section with the Issue Template.


PHP 5.3.3 and later.


You can install the bindings via Composer. Run the following command:

composer require reso/reso-php

To use the bindings, use Composer's autoload:


Manual Installation

If you do not wish to use Composer, you can download the latest release. Then, to use the bindings, include the init.php file.



The following PHP extensions are required for all the RESO WebAPI Client PHP SDK functions to work properly:

If you use Composer, these dependencies will be handled automatically. If you install manually, you'll want to make sure that these extensions are available.

Getting Started

Simple usage looks like:

// Set the variables
// Authorize user
$auth_code = RESO\OpenIDConnect::authorize('YOUR_USERNAME', 'YOUR_PASSWORD', '', 'ODataApi');
// Get access token
RESO\RESO::setAccessToken(RESO\OpenIDConnect::requestAccessToken($auth_code, '', 'ODataApi'));
// Set the Accept header (if needed)
// Retrieve top 10 properties from the RESO API endpoint
$data = RESO\Request::request('Property?\$top=10', 'json', true);

// Display records

Example apps

Several usage examples are provided in the examples/ folder:

  • cli-example - provides a sample console application to query RESO API data;
  • web-example - provides a sample PHP + HTML application to login (auth done on server-side) and execute RESO API requests, retrieve the data;
  • web-callback-example - provides a sample PHP application, which demonstrates the user auth using callback URL.

To configure the example app variables / settings - copy the config.php file in each example application as _config.php and edit the variables accordingly.

Configuring a Logger

The SDK has a built-in logger for debug / testing purposes. Usage:

// Set logging
RESO\RESO::setLogEnabled(true); // enables logging in general. Default: false.
RESO\RESO::setLogConsole(true); // enables log messages to console.
RESO\RESO::setLogFile(true); // enabled log messages to be written to log file.

Unit Tests

The SDK code set contains PHPUnit tests. The tests reside in the tests/ folder and covers core RESO WebAPI Client PHP SDK functionality testing.

To run the tests duplicate the tests/config.php file to tests/_config.php and set the appropriate API variables. Then, execute:

./vendor/bin/phpunit --bootstrap init.php tests/


Please read the contributing guidelines if You are interested in contributing to the project.

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