Top 9 open-source products relevant to API Tools and API

Design, debug, test, and mock APIs locally, on Git, or cloud. Build better APIs collaboratively for the most popular protocols with a dev‑friendly UI, built-in automation, and an extensible plugin ecosystem.

Open Source

Stoplight is an API Design, Development, and Documentation platform that enables consistency, reusability, and quality in your API lifecycle, all with an easy, enjoyable developer experience. .

Open Source freemium

Easy mocking of any system you integrate with via HTTP or HTTPS.

Open Source

WhatsApp API for Developers. Integrate WhatsApp seamlessly with Maytapi's powerful API. Manage messages, groups, channels, and statuses effortlessly. Stable, developer-friendly, and REST API with excellent support and documentation www.maytapi.com .

Open Source freemium $24.0 / Monthly (Unlimited Message and API Access With No Extra Fees (Annually))

Fresh API monitoring and Site Transaction Monitoring. From one great dashboard.

Open Source

The next-generation Rest API framework.

Open Source

With GraphQL Portal, you can connect any of your data-sources: REST APIs, databases, Salesforce, SAP, Oracle, Magento, AEM, PIM, DAM, CRM into a single graph, easy to integrate with any front-end applications.

Open Source freemium $19.0 / Monthly (Individual limited to 1000 requests per month)

Fast, testable, Scala services built on TwitterServer and Finagle, by Twitter.

Open Source

Qodex.ai - The First AI-Powered Virtual QA Engineer.

Open Source freemium $99.0 / Monthly ("1000 Test Scenario Builds" , "1000 AI Credits" )