Top 18 Kotlin API Projects

API

• Add a project

1. Komga

   1 77 6,322 9.3 Kotlin

   Media server for comics/mangas/BDs/magazines/eBooks with API, OPDS, Kobo Sync and KOReader Sync support

   

   Project mention: 5 self-hosted ebook managers worth trying in 2026 | dev.to | 2026-04-17

   Supports: CBZ, CBR, PDF, EPUB Deploy: Docker or standalone JAR · komga.org · 6k stars

2. SaaSHub

   www.saashub.com featured

   SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives

   

3. android-sms-gateway

   2 2 4,519 8.2 Kotlin

   The SMS Gateway for Android™ app enables sending and receiving SMS messages through an API that can be accessed directly on the device or via a cloud server when direct device access is not possible.

   

   Project mention: Don't Build Multi-Agents | news.ycombinator.com | 2025-09-01

   I am in the USA! Although these days that exclamation point doesn't feel great...

   I'm using an old Android phone (Pixel 2 from 2017), a 5$ a month unlimited SMS plan from Tello, and https://github.com/capcom6/android-sms-gateway. For bonus points (I wanted to roll my own security, route messages from different numbers to prod and ppe instances of my backend, and dedup messages) I built a little service in Go that acts as an intermediary between my backend and android-sms-gateway. I deploy this service to my android device using ADB, android-sms-gateway talks to it, and it talks to my backend. I also rooted the android device so I could disable battery management for all apps (don't do this if you want to walk around with the phone of course). It works pretty well!

   I plan to open-source this eventually TM, but first I need to decouple my personal deployment infra from the bits useful to everyone else

4. WeatherMaster

   3 2 2,831 9.9 Kotlin

   A Weather app for android 🌦🌞☔

   

   Project mention: A Eulogy for Dark Sky, a Data Visualization Masterpiece (2023) | news.ycombinator.com | 2026-01-10

   Breezy Weather and Weather Master right now are IMO the two best open source weather apps on Android

   https://github.com/PranshulGG/WeatherMaster

5. openai-kotlin

   4 3 1,835 5.6 Kotlin

   OpenAI API client for Kotlin with multiplatform and coroutines capabilities.

   

6. NotyKT 🖊️

   5 2 1,762 9.3 Kotlin

   📒 NotyKT is a complete 💎Kotlin-stack (Backend + Android) 📱 application built to demonstrate the use of Modern development tools with best practices implementation🦸.

   

7. sandwich

   6 3 1,759 9.1 Kotlin

   🥪 Sandwich is an adaptable and lightweight sealed API library designed for handling API responses and exceptions in Kotlin for Retrofit, Ktor, and Kotlin Multiplatform.

   

8. material-chip-view

   7 0 1,340 3.2 Kotlin

   Material Chip view. Can be used as tags for categories, contacts or creating text clouds

   

9. zally

   8 2 946 4.9 Kotlin

   A minimalistic, simple-to-use API linter

   

10. UnifiedMetrics

    9 2 539 1.1 Kotlin

    Fully-featured metrics collection agent for Minecraft servers. Supports Prometheus and InfluxDB. Dashboard included out-of-box.

    

11. JRAW

    10 7 361 0.0 Kotlin

    The Java Reddit API Wrapper

    

12. Kanary

    11 0 335 0.0 Kotlin

    A minimalist web framework for building REST APIs in Kotlin/Java.

    

13. Kotlin Spotify Web API

    12 3 216 6.6 Kotlin

    Spotify Web API wrapper for Kotlin, Java, JS, and Native - Targets JVM, Android, JS (browser), Native (Desktop), and Apple tvOS/iOS. Includes a Spotify Web Playback SDK wrapper for Kotlin/JS, and a spotify-auth wrapper for Kotlin/Android.

    

14. cross-device-sdk

    13 1 103 10.0 Kotlin

    Discontinued The Cross device SDK allows developers to build rich multi-device experiences with a simple and intuitive set of APIs

    

15. Gamebaaz

    14 6 96 4.1 Kotlin

    A full-stack application showing the power 💪 of KOTLIN. Entire android app + backend Apis written in Kotlin 🔥

    

16. ChatGPT-Java-API

    15 1 71 6.7 Kotlin

    Unofficial Java API supporting Chat, Assistants, and more!

    

17. http-request-kotlin

    16 1 11 10.0 Kotlin

    🌐 A tiny http client for Kotlin/Android. Only 90 lines of code.

    

18. ungh-kt

    17 1 1 2.7 Kotlin

    Unofficial Kotlin driver for the ungh api

    

19. sc-api-kt

    18 1 1 10.0 Kotlin

    Stalcraft API implementation in Kotlin

    

Kotlin API related posts

• Don't Build Multi-Agents

  1 project | news.ycombinator.com | 1 Sep 2025

• Building a subscription tracker Desktop and iOS app with compose multiplatform - Configuring Notion

  3 projects | dev.to | 25 Jun 2024

• GitHub - mjovanc/github-api: Kotlin wrapper for GitHub API in an object-oriented matter.

  1 project | /r/programmingHungary | 12 Aug 2023

• GitHub - mjovanc/github-api: Kotlin wrapper for GitHub API in an object-oriented matter.

  1 project | /r/ktor | 11 Aug 2023

• GitHub - mjovanc/github-api: Kotlin wrapper for GitHub API in an object-oriented matter.

  1 project | /r/webdev | 11 Aug 2023

• GitHub - mjovanc/github-api: Kotlin Wrapper for GitHub API in an object-oriented matter.

  1 project | /r/webdev | 6 Jul 2023

• GitHub API library for Kotlin

  1 project | /r/Web_Development | 6 Jul 2023
• A note from our sponsor - SaaSHub
  www.saashub.com | 6 Jun 2026

  SaaSHub helps you find the best software and product alternatives Learn more →

Index

Sponsored

SaaSHub - Software Alternatives and Reviews

SaaSHub helps you find the best software and product alternatives

www.saashub.com

Do not miss the trending Kotlin projects with our weekly report!