Best API Gateways & Backends GitHub Repositories

✉️ Open-Source Email API for Developers. Cloud & Self-hosted Alternative to SES, Mailgun, SendGrid.

Use Apache Causeway™ to rapidly develop domain-driven apps or modular monoliths in Java, on top of the Spring Boot platform. Write your business logic in entities, domain services or view models, and the framework dynamically generates a representation of that domain model as a webapp, GraphQL or RESTful API. For prototyping or production.

PnP PowerShell

Python Api Client for Airtable

Nornicdb is a distributed low-latency, Graph+Vector, Temporal MVCC with all sub-ms HNSW search, graph traversal, and writes. Using Neo4j Bolt/Cypher and qdrant's gRPC means you can switch with no changes while adding intelligent features like schemas, managed embeddings, reranking+llm, GPU accel, Auto-TLP, Policy-based Memory Decay, and MCP server.

Thelia is an open-source e-commerce CMS and framework built on Symfony 7 and API Platform.

Powerful, flexible, and scalable ecosystem of Rust libraries for the Discord API.

The swiss army knife of RBI generation

Toolbox for .NET: more than 100 focused NuGet packages covering ASP.NET Core, Blazor, WPF, Win32 APIs, and more. Pick only the pieces you need instead of rewriting the same helpers in every project.

Stay ahead of AI trends with automated Reddit insights! 🚀 This tool scans AI-related Reddit communities in English & Chinese, using Reddit Official API, DeepSeek V4.1 by OpenRouter to analyze posts, summarize key discussions, and track trends. Daily rankings hot topics—catch emerging trends before they go mainstream! (Updated every 6 AM CDT)

Open-source construction ERP - BOQ, PDF/CAD/BIM takeoff, AI cost matching, 293 guided cases. 120,000+ priced positions, 45 languages, 192 modules. AGPL-3.0. pip install openconstructionerp

MCP Gateway is a reverse proxy and management layer for MCP servers, enabling scalable, session-aware stateful routing and lifecycle management of MCP servers in Kubernetes environments.

Game engine for 2D and 3D projects with entity component system (ECS) and data-oriented design

Rapidly build MCP servers for your Laravel applications.

Bindings for the Zend API to build PHP extensions natively in Rust.

A versatile Ruby web spidering library that can spider a site, multiple domains, certain links or infinitely. Spidr is designed to be fast and easy to use.

GraphQL Router / API Gateway framework written in Golang, focussing on correctness, extensibility, and high-performance. Supports Federation v1 & v2, Subscriptions & more.

Simulate API failures, throttling, and chaos — all from your command line.

Control how your documents get signed

Go With Your Own Intelligence! Use Go for hardware accelerated local inference with llama.cpp, whisper.cpp, and stable-diffusion.cpp directly integrated into your Go applications. Kronk provides a high-level API and production ready model server.