API Rest GitHub Repositories (2026) · Open Source Tools

Open-Source API Development Ecosystem • https://hoppscotch.io • Offline, On-Prem & Cloud • Web, Desktop & CLI • Open-Source Alternative to Postman, Insomnia

The first open-source AI-driven tool for automatically generating system-level test cases (also known as fuzzing) for web/enterprise applications. Currently targeting whitebox and blackbox testing of Web APIs, like REST, GraphQL and RPC (e.g., gRPC and Thrift).

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

The no-magic web API and microservices framework for Python developers, with a focus on reliability and performance at scale.

Backend that powers the dataset viewer on Hugging Face dataset pages through a public API.

Bulk port forwarding Kubernetes services for local development.

Python wrapper for the Mastodon ( https://github.com/mastodon/mastodon/ ) API.

The most comprehensive collection of quality OpenAPI tooling, curated by Phil Sturgeon and the team at APIs You Won't Hate.

🍀 Trefle is a botanical JSON REST API for plants species, allowing you to search and query over all the registered species, and build the next gardening apps and farming robots.

Based on the proxy gateway service of dubbo-go, it solves the problem that the external protocol calls the internal Dubbo cluster. At present, it supports HTTP and gRPC[developing].

SDKs for CoinAPI & FinFeedAPI

Verifactu: Envío de registros de facturación a la AEAT

FusionDirectory is a modern, efficient and secure Identity Management (IAM) solution.

Django website for a comic book database

⚠️ Moved to anandbagmar/teswiz — see README ⚠️

An easy to use API that allows you to get waifu pictures from an archive of over 4000 images and multiple tags!

An API Boilerplate to create a ready-to-use REST API in seconds with Fastify + Kysely and JWT Authentication