InfluxDB 3 OSS is now GA. Transform, enrich, and act on time series data directly in the database. Automate critical tasks and eliminate the need to move data externally. Download now. Learn more →
Top 14 C++ REST-API Projects
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deepdetect
Deep Learning API and Server in C++14 support for PyTorch,TensorRT, Dlib, NCNN, Tensorflow, XGBoost and TSNE
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JetBrains
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ESP-StepperMotor-Server
Turn your ESP32 into a complete stepper motor control server with web UI, REST API and serial control interface
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Sevalla
Deploy and host your apps and databases, now with $50 credit! Sevalla is the PaaS you have been looking for! Advanced deployment pipelines, usage-based pricing, preview apps, templates, human support by developers, and much more!
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DiscordCoreAPI
A bot library for Discord, written in C++, and featuring explicit multithreading through the usage of custom, asynchronous C++ CoRoutines.
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siodb
A simple SQL database engine. All encrypted. Execute multiple SQL queries at once through one REST query. No ORM and no additional modules required. Available for all programming languages.
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ql_rest
REST API for QuantLib. This project aims to simplify the development of microservices for risk management and pricing of various financial instruments in the distributed environment using QuantLib
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ArdorQuery
ArdorQuery is a cross-platform tool for performing any HTTP(S) endpoints like REST API, HTML, Images, GraphQL, OData etc.
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qbm-http
High-performance HTTP/1.1 & HTTP/2 client/server module for QB Actor Framework. Features async I/O, routing engine, middleware system, JWT auth, and SSL/TLS support. Build REST APIs, web services, and HTTP clients with modern C++17 and zero-copy operations.
Target Audience: Intermediate C++ developers looking to build fast and scalable web backends. GitHub: https://github.com/isndev/qbm-http
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InfluxDB
InfluxDB – Built for High-Performance Time Series Workloads. InfluxDB 3 OSS is now GA. Transform, enrich, and act on time series data directly in the database. Automate critical tasks and eliminate the need to move data externally. Download now.
NOTE:
The open source projects on this list are ordered by number of github stars.
The number of mentions indicates repo mentiontions in the last 12 Months or
since we started tracking (Dec 2020).
C++ REST-API discussion
C++ REST-API related posts
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Hacker News top posts: Nov 8, 2022
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What do you see as the advantage of using gRPC when compared to simply sending protobuff over a rest API?
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How do I serve up HTML, CSS and JSS from programmed memory on the ESP32?
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The Beauty of Open Source
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RESTC++ - Micro web framework with C++
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SQL queries through REST available now!
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As a developer, are you going to use Rocky Linux as soon as possible?
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A note from our sponsor - InfluxDB
www.influxdata.com | 1 Sep 2025
Index
What are some of the best open-source REST-API projects in C++? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | deepdetect | 2,544 |
| 2 | icinga2 | 2,117 |
| 3 | TinyGSM | 2,111 |
| 4 | libhttpserver | 926 |
| 5 | aWOT | 305 |
| 6 | ESP-StepperMotor-Server | 255 |
| 7 | FRequest | 172 |
| 8 | DiscordCoreAPI | 158 |
| 9 | cpp_restapi | 48 |
| 10 | siodb | 45 |
| 11 | HDA_with_Cpp | 36 |
| 12 | ql_rest | 28 |
| 13 | ArdorQuery | 8 |
| 14 | qbm-http | 3 |
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