Best API Gateways & Backends GitHub Repositories

Automatic TV episode file renamer, uses data from thetvdb.com via tvdb_api

An API-compatible, drop-in replacement for Apple's Foundation Models framework with support for custom language model providers.

API and library for MAVLink compatible systems written in C++

Apache Log4net is a versatile, feature-rich, efficient logging API and backend for .NET

A terraform provider to manage objects in a RESTful API

Batteries-included backend that works with any stack.

Web UI and REST API for PowerDNS: zones, records, DNSSEC, users, with Terraform and Kubernetes integrations

PacketEvents is a protocol library tailored to Minecraft Java Edition, designed to facilitate the processing and transmission of packets.

Lucee is a high-performance, open-source CFML server written in Java. Supporting JDBC, Caching, Parallelism, HTTP, ORM, REST, S3 and dynamic Java integration, Lucee is great for developers aiming to build fast, scalable applications, delivering faster startup, rapid compilation and better runtime performance.

A Discord API wrapper for Python and asyncio built on good intentions.

ID-based RAG FastAPI: Integration with Langchain and PostgreSQL/pgvector

✉️ 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.