420.9k
Public APIs
A curated list of free APIs for use in software and web development, enabling easy discovery of public API resources.
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Best Open-Source API Tools in 2026
A curated list of the best, top, and most popular open-source api tools available right now. Showing the top 30 of 106 api tools in our directory, ranked by GitHub stars.
- 183.6k
N8n
A powerful fair-code workflow automation platform with native AI capabilities. It combines visual workflow building with the ability to include custom code. Self-host or use the cloud version with over 400+ integrations available.
👨💻 Development⚙️ DevOps🔁 API🤖 AI - 100.7k
Supabase
Supabase is an open-source alternative to Firebase, offering a rich Postgres database solution tailored for building efficient web, mobile, and AI applications.
🔁 API💾 Database👨💻 Development🌐 Web - 83.5k
Servers
Model Context Protocol Servers provide a framework for managing and deploying machine learning models effortlessly across various environments.
🔁 API👨💻 Development🤖 AI - 78.9k
Hoppscotch
Open source API development ecosystem, serving as an efficient and open-source alternative to Postman and Insomnia.
👨💻 Development🔁 API🛠️ Tools - 77.8k
RAGFlow
RAGFlow is a leading open-source Retrieval-Augmented Generation (RAG) engine that combines advanced RAG methods with Agent capabilities, delivering a superior, context-rich experience for Large Language Models (LLMs). It enables efficient information retrieval and contextual augmentation, optimizing generative AI pipelines.
🤖 AI🔁 API🧰 Framework🛠️ Tools - 72.7k
OpenAI Cookbook
A comprehensive guide with examples for using the OpenAI API effectively.
🔁 API🤖 AI📚 Documentation - 63.1k
Open Interpreter
A natural language interface for computers that enhances human-computer interaction through voice and text commands.
🤖 AI🛠️ Tools🔁 API - 62.7k
Traefik
A powerful Cloud Native Application Proxy designed for ease of use and automation. It seamlessly integrates with your infrastructure components and configures itself automatically and dynamically.
⚙️ DevOps🔁 API🔎 Monitoring🏎️ Performance - 57.5k
Pocketbase
An open-source, realtime backend system condensed into a single file. It provides instant APIs and a stylish admin UI for managing your apps effortlessly.
👨💻 Development🔁 API💾 Database - 57.1k
MeiliSearch
A lightning-fast search engine API bringing AI-powered hybrid search to your sites and applications.
🔁 API🤖 AI⚙️ DevOps - 55.7k
Appwrite
Appwrite is an open-source backend server for Web, Mobile, and Flutter developers. It provides a set of easy-to-use REST APIs for managing authentication, databases, storage, and more.
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- 49.1k
Huginn
Create agents that watch for certain triggers and perform automated actions, making it a personal IFTTT. Your agents are standing by to automate tasks on your behalf.
🏠 Self-Hosted🔁 API🔎 Monitoring - 43.7k
Firecrawl
🔥 Turn entire websites into LLM-ready markdown or structured data using an efficient API. Easily scrape, crawl, and extract data.
👨💻 Development🔁 API🌐 Web - 41.3k
Curl
A versatile command line tool and library (libcurl) for transferring data with URLs. Supports protocols including HTTP, HTTPS, FTP, FTPS, SCP, SFTP, LDAP, SMB, SMTP, POP3, IMAP, MQTT, RTSP, and many more. Widely used for network troubleshooting, automation, and data transfer for developers and system administrators.
⌨️ CLI🔁 API🛠️ Tools👨💻 Development - 40.0k
TRPC
🧙♀️ Move Fast and Break Nothing. End-to-end typesafe APIs made easy, providing a seamless experience for creating scalable APIs with full TypeScript support.
👨💻 Development🔁 API🔷 TypeScript - 39.6k
Appsmith
Appsmith is a platform to build admin panels, internal tools, and dashboards. It seamlessly integrates with over 25 databases and any API.
👨💻 Development🛠️ Tools🔁 API💾 Database - 38.8k
Novu
Open-Source Notification Platform. Embeddable Notification Center, with E-mail, Push and Slack Integrations.
👨💻 Development🔁 API🛠️ Tools - 36.2k
Awesome DeepSeek Integration
Integrate the DeepSeek API into popular software applications, providing seamless connectivity and enhanced functionality.
🔁 API🛠️ Tools - 35.8k
Insomnia
The open-source, cross-platform API client for GraphQL, REST, WebSockets, SSE, and gRPC, featuring Cloud, Local, and Git storage.
🔁 API👨💻 Development🛠️ Tools - 35.0k
ToolJet
A low-code platform for building business applications with a drag and drop builder, supporting integration with various databases, cloud storages, and APIs.
👨💻 Development🛠️ Tools🌐 Web🔁 API - 34.8k
Directus
The flexible backend for all your projects 🐰 Turn your database into a headless CMS, admin panels, or applications with a custom UI, instant APIs, authentication, and more.
📝 CMS🔁 API👨💻 Development - 32.6k
Medusa
The world's most flexible commerce platform, designed to build a custom, scalable, and modular commerce experience.
🛍️ E-Commerce👨💻 Development🔁 API🛠️ Tools - 29.8k
Consul
Consul is a distributed, highly available, and data center-aware service networking solution designed to connect and configure applications across dynamic, distributed infrastructure. It provides service discovery, configuration, and segmentation functionalities, making it essential for modern cloud-native and microservices architectures.
⚙️ DevOps🏗️ Architecture🔁 API🛠️ Tools - 28.8k
Github-mcp-server
GitHub's official MCP Server which is crucial for managing and administering GitHub's internal systems.
👨💻 Development🔁 API🛠️ Tools - 28.5k
Chatwoot
Open-source live-chat, email support, and omni-channel support desk. An alternative to Intercom, Zendesk, and Salesforce Service Cloud.
🔁 API👨💻 Development⚙️ DevOps🛠️ Tools - 26.7k
Discord.js
A powerful JavaScript library for creating bots and applications by interacting with the Discord API.
🔁 API👨💻 Development🟡 JavaScript - 26.6k
React-admin
A frontend Framework for building single-page applications on top of REST/GraphQL APIs, utilizing TypeScript, React, and Material Design.
🧰 Framework⚛️ React🔁 API👨💻 Development - 25.6k
Typesense
Open Source alternative to Algolia and Pinecone, and an easier-to-use alternative to ElasticSearch. Fast, typo tolerant, in-memory fuzzy search engine for building delightful search experiences.
👨💻 Development🔁 API🛠️ Tools💾 Database - 24.3k
Composio
Equips your AI agents & LLMs with over 100 high-quality integrations via function calling.
🤖 AI🔁 API👨💻 Development🛠️ Tools
Frequently asked questions
What is the best open-source api tool in 2026?
Public APIs is the most popular by GitHub stars right now. A curated list of free APIs for use in software and web development, enabling easy discovery of public API resources.
Are these api tools free?
Yes. Every tool on this list is open source and free to use in your own projects. Many can be self-hosted.
How is this list ranked?
Tools are ranked by GitHub star count, a strong proxy for community adoption and active maintenance. Star counts are refreshed regularly.
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