API Discovery Organizations

These are the organizations I come across in my research who are doing interesting things in the API space. They could be companies, institutions, government agencies, or any other type of organizational entity. My goal is to aggregate so I can stay in tune with what they are up to and how it impacts the API space.


Issuu is digital publishing and discovery platform that connects people to content for which they have great passion, created by publishers large and small, that share that passion. A digital publishing service that reimagines the print experience, Issuu hosts over 17 million publications and serves over 5.5 billion page-views to over 80 million active readers each month. The site features leading and emerging titles in fashion, culture, arts, hobbies, catalogs and hyperlocal content, all of which are accessible on any device.


Mashape provides tools that enable developers to quickly deliver and consume APIs and offers a marketplace for listing APIs. Mashape provides tools for testing your API, code for generation of custom errors, components for user management and standardized API code language libraries in multiple languages.  Once your API is ready for prime time Mashape provides a marketplace for listing your API, letting developers to easily discover and begin hacking with your API, in a social API community environment.

AWS Directory Service

AWS Directory Service for Microsoft Active Directory (Enterprise Edition), also known as AWS Microsoft AD, enables your directory-aware workloads and AWS resources to use managed Active Directory in the AWS Cloud. The Microsoft AD service is built on actual Microsoft Active Directory and does not require you to synchronize or replicate data from your existing Active Directory to the cloud. You can use standard Active Directory administration tools and take advantage of built-in Active Directory features such as Group Policy, trusts, and single sign-on. With Microsoft AD, you can easily join Amazon EC2 and Amazon RDS for SQL Server instances to a domain, and use AWS Enterprise IT applications such as Amazon WorkSpaces with Active Directory users and groups.


HyperCat is a hypermedia catalogue format designed for exposing information about IoT assets over the web. 


Hitch is a single platform to help API owners engage with and grow their API community. Our clients show striking similarities in the challenges they face in building integrated and sustainable developer platforms. API providers still struggle to make sure their platform is visible to the right audience. Once found, access is inconsistent and cumbersome and even after onboarding, key engagement tools are seldom available. We have put together a single solution that covers these three key areas.

Google API Discovery Service

You can use the Google API Discovery Service to build client libraries, IDE plugins, and other tools that interact with Google APIs. It provides a lightweight, JSON-based API that exposes machine-readable metadata about Google APIs.

Public APIs

We know how hard it is to find great APIs. So we built PublicAPIs.com where you can instantly search through thousands of APIs and discover public cloud web services. By searching through public APIs, developers can save time and energy, easily finding the APIs (software components) they need to quickly create and deliver an application on any platform (Mobile, Web, etc).

Product Hunt

Product Hunt surfaces the best new products, every day. It's a place for product-loving enthusiasts to share and geek out about the latest mobile apps, websites, hardware projects, and tech creations.


ProgrammableWeb is where you stay in tune with what's new and interesting with mashups, Web 2.0 APIs, and the new Web as Platform. The core of the site is the news blog and the 4 dashboards: Home, Mashups, APIs, and Members. New updates every day, 365 days a year. ProgrammableWeb was the original public, web API directory, providing a growing directory of APIs that every developer has used to discover the APIs they are looking for.   ProgrammableWeb was started in 2005 by John Musser, and sold to Alcatel-Lucent in 2010, then again in 2013 to Mulesoft.  

API Harmony

IBM API Harmony for Bluemix supports developers in identifying and selecting APIs. It reveals relationships of already selected and searched for APIs, guiding developers in finding useful API combinations.


We launched APIHound because -like you- we depend on finding APIs to build cool stuff. We searched for a good API directory, but all we found were sites like ProgrammableWeb that have been manually collecting APIs for years and PublicAPIs which has a very small API database. There had to be more APIs out there waiting to be found. We decided it was time to bring API Searching into the 21st century. APIHound is continuously examining billions of pages to locate the best API resources. The result is that APIHound has uncovered over 50,000 APIs indexed, categorized, and available for searching. Our API list is more than 4x larger than similar sites that have been around for years. We are working hard to add more sites and categories and tune our detection and scoring strategies. Our mission is to help you uncover APIs that will help you build great things.


APIs are becoming a crucial part of the Web. Unfortunately however, it remains very difficult to determine the location of these APIs on servers around the Web. The only way to discover APIs and their properties is via human driven search through public search engines or in hand curated API Directory listings. While these methods work, neither can scale to the potentially hundreds of thousands and millions of APIs which will be published over the next few years.


Dash is an API Documentation Browser and Code Snippet Manager. Dash stores snippets of code and instantly searches offline documentation sets for 150+ APIs (for a full list, see below). You can even generate your own docsets or request docsets to be included.


RapidAPI is the world’s largest API marketplace. RapidAPI lets you visualize all your apps’ APIs, and gives you real-time metrics on their stability. There are millions of software programs out there and they’re reshaping every aspect of our lives. We believe that they can get exponentially better by sharing data and functionality with each other. APIs are the language that software uses to communicate and connect.  That’s why we love APIs.

W3C Web API Discovery Group

A group to develop a mechanism for the automatic discovery of WebAPIs, by extending the schema.org vocabulary. Increasingly, large online platforms and services provide one or more Web APIs for third-party developers. Moreover, many companies build WebAPIs as their primary product (Email API, SMS API, etc.). This has resulted in an explosion of the number of WebAPIs in recent years. Developers spend a significant amount of time searching for suitable WebAPIs to meet their needs. Our intention is to work closely with Schema.org to define a WebAPI-specific extension and promote usage of this extension among API owners. In the long run, our aim is to contribute this extension into the core Schema.org vocabulary. To achieve these goals we are seeking feedback and collaboration from API owners, DX specialists, API description language experts and maintainers of various API catalogs.


APIs.io os an experimental API Search service to help discover APIs on the web. The service uses the APIs.json proposed discovery format. To find APIs type your request in the search box. To get listed follow the instructions in the FAQ. The Search engine is also open source so you can run your own copy.


ContentGems helps marketers find, curate, and share engaging content so they can build their company's thought leadership and increase qualified website traffic. ContentGems was founded in 2011 by Jeff Ward, Joachim Hund, and Michael J. Fern, who were seeking to carry out content marketing for their own software development and consulting businesses.


Lateral's mission is to help people discover the information they need when they need it. By enabling developers to integrate machine learning into their services, we hope to accelerate discovery, understanding and ultimately collaboration across a wide range of disciplines. We identify solutions that benefit from machine learning and build modular APIs that are simple to integrate. Our first API is the Hybrid Recommender that merges behavioural data and machine intelligence. It solves a problem faced by many of how to provide relevant content recommendations to users and can work without collaborative data

AWS Service Catalog

AWS Service Catalog allows organizations to create and manage catalogs of IT services that are approved for use on AWS. These IT services can include everything from virtual machine images, servers, software, and databases to complete multi-tier application architectures. AWS Service Catalog allows you to centrally manage commonly deployed IT services, and helps you achieve consistent governance and meet your compliance requirements, while enabling users to quickly deploy only the approved IT services they need.

AWS EC2 Container Registry Service

Amazon EC2 Container Registry (ECR) is a fully-managed Docker container registry that makes it easy for developers to store, manage, and deploy Docker container images. Amazon ECR is integrated with Amazon EC2 Container Service (ECS), simplifying your development to production workflow. Amazon ECR eliminates the need to operate your own container repositories or worry about scaling the underlying infrastructure. Amazon ECR hosts your images in a highly available and scalable architecture, allowing you to reliably deploy containers for your applications. Integration with AWS Identity and Access Management (IAM) provides resource-level control of each repository. With Amazon ECR, there are no upfront fees or commitments. You pay only for the amount of data you store in your repositories and data transferred to the Internet.

If you think there is an organization I should have listed here feel free to tweet it at me, or submit as a Github issue. Even though I do this full time, I'm still a one person show, and I miss quite a bit, and depend on my network to help me know what is going on.