Guzzle is a PHP HTTP client library
Guzzle is a PHP HTTP client library and framework for building RESTful web service clients
Slim is a PHP micro framework that helps you quickly write simple yet powerful web applications and APIs
The most popular PHP library for use with the Twitter OAuth REST API.
REST Server for the CodeIgniter framework
Access your WordPress site's data through an easy-to-use HTTP REST API.
Handle the output of complex data structures ready for API output.
This Bundle provides various tools to rapidly develop RESTful API's with Symfony
PHP HTTP client. This library is deprecated in favor of https://packagist.org/packages/guzzlehttp/guzzle
swagger-php - Generate interactive documentation for your RESTful API using phpdoc annotations
PHP Curl Class makes it easy to send HTTP requests and integrate with web APIs.
Generates documentation for your REST API from annotations
A Readable, Chainable, REST friendly, PHP HTTP Client
PayPal's PHP SDK for REST APIs
One million downloads of Payum already! Payum offers everything you need to work with payments. Friendly for all PHP frameworks (Symfony, Laravel, Zend, Yii, Silex). Check more visiting site.
Restler is a simple and effective multi-format Web API Server framework written in PHP. Just deal with your business logic in php, Restler will take care of the REST!
Single file PHP script that adds a REST API to a SQL database.
This bundle provides JWT authentication for your Symfony REST API
A Slim Framework skeleton application for rapid development
Library for interacting with the Pusher REST API
RBAC Auth manager for Yii2
A standalone Amazon S3 (REST) client for PHP 5.2.x using CURL that does not require PEAR.
A PHP library to support implementing representations for HATEOAS REST web services
The RESTful Web App PHP Micro-Framework