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Open Source APIs

List of some free open source web APIs available on the RapidAPI marketplace.

Top 50 Most Popular APIs on RapidAPI (2021)
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Helioviewer v1

Helioviewer is an open-source project for the visualization of solar and heliospheric data, funded by ESA and NASA.

5.2
406 ms
100%
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Kaiko - Digital Assets Reference Data

The Kaiko reference API is an open source solution that maps all assets and instruments on all exchanges, accessible through the Market API. More info: https://docs.kaiko.com/#reference-data-api

4.3
833 ms
100%
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Blackjack by Emgidy

Open source and fully functional Blackjack game. It is built on a REST based application programming interface (API). We have taken care of all the back-end complexities so you can concentrate on creating your own games. Register to get your API credentials to start playing or download a developers build of the game. Read the documentation at http://docs.betgidy.com/blackjack-api/

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Elyez - Free Open Source GPS Tracking

Free and Open source GPS Tracking Platform. This is the API Platform to provide easy integration and no need IP public servers to run your own platform. Open source hosted on gitlab, https://gitlab.com/elyez, customize as your needs. Free your soul and business from vendor locked system now.

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Quantum

Discover the non-original code inside your software

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Ghost

Ghost is a fully open source, hackable platform for building and running a modern online publication.

0.1
127,269 ms
0%
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MrLooquer IPv6 Intelligence

RESTFull API to get data from MrLooquer service. MrLooquer combines open source intelligence techniques with heuristic and data mining to perform one of the first attempts to create a real map about IPv6 deployment and its relationship with current networks and protocols.

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Text Tone Sentiment

Over 90% accurate on our tests. Pass it text, get back a score representing the sentiment of the text you pass in. Trained on IMDB movie data.

0
124 ms
0%
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DeckBrew

The DeckBrew Magic: The Gathering API is open source. Please report any issues or bugs you encounter. This API wouldn't have been possible without the amazing mtgjson and mtgimage resources.

0.3
208,333 ms
0%
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LibrariesIo

The Open Source Discovery Service.

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Open Source API

About open source software

Open source, sometimes abbreviated as OS, is a type of software distribution model that releases its source code for the world to see.

OS projects power some of the largest names in web-based software, including WordPress and Wikipedia.

What is an open source API?

APIs released under an open source model are just like any other open source project. Their accessible source code can make them powerful tools in the developer’s arsenal of coding shortcuts.

How do open source APIs work?

API that are released as open source function the same way as any other type of API.

Typically, that means a developer sends a query to the API for an external service using the language their program is written in. The API will then take that query and either update data on that external service or return it to the program where the query originated.

Who is an open source API for?

Because there are so many APIs that use open source distribution models, and they have so many different feature sets, this type of API is for every developer who enjoys free access.

Why are open source APIs important?

There are many benefits of open source APIs for developers.

First and foremost, the source code for the API is accessible to anyone. That means if there is a question developers have about an API integration in their program, they can simply look at the source code to find out what isn’t working and why because of the developer community backing the open source API.

Because open source projects are usually community-driven, developers can also develop an API’s functionality with the help of everyone in the community for their projects.

Additionally, these APIs are often free of charge, reducing costs even more than an API developed using proprietary software.

What can you expect from open source APIs for developers?

Open source projects depend in part on their communities.

If an API has an inactive community, it is likely not being updated. Contrarily, busy communities suggest the API will be usable for years to come.

Are there examples of the best free open source APIs?

APIs that are distributed under an open source license are almost always free. However, some may have premium features such as support available at an additional cost.

  1. Kaiko
  2. Elyez
  3. Deckbrew
  4. Quantum
  5. Ghost API
  6. Text Tone Sentiment
  7. LibrariesIO

Open Source API SDKs

All open source APIs are supported and made available in multiple developer programming languages and SDKs including:

  1. Node.js
  2. PHP
  3. Python
  4. Ruby
  5. Objective-C
  6. Java (Android)
  7. C# (.NET)
  8. cURL

Just select your preference from any API endpoints page.

Sign up today for free on RapidAPI to begin using Open Source APIs!