In the current era of AI, APIs (Application Programming Interfaces) have become powerful tools that connect AI capabilities with traditional programs, helping developers quickly integrate AI functions. With the rapid development of artificial intelligence technology, various AI models and services have emerged, including natural language processing, image recognition, and speech synthesis. As a bridge, APIs make it easy to call these powerful AI functions, greatly reducing technical barriers and enabling developers to implement complex features in a short time.

Moreover, APIs play a crucial role in data integration and system interoperability. In enterprise-level applications, it is often necessary to integrate multiple systems and data sources. APIs provide standardized interfaces for communication between these systems. Whether for data exchange between internal systems or data sharing with external partners, seamless connections can be achieved through APIs.

When using third-party APIs, free and practical APIs are often the first choice for programmers because they allow developers to experiment with new features at zero cost. However, finding a large number of useful free APIs is not easy and often a headache. To help programmers quickly find the APIs they need, Mijian Integration has compiled a list of 6 free API platforms. These platforms not only offer a wide range of API options but also provide convenient interface resources, helping developers efficiently conduct development and testing.

1. Explinks – API HUB Explinks – API HUB is a leading API platform in China, with the mission of "connecting everything with APIs." It aims to become the most comprehensive API community, providing programmers with the ability to discover and try out domestic and international APIs in one place.

Explinks – API HUB aggregates over 5000+ API HUB interfaces and 1500+ API service providers, offering perfect solutions for enterprises to achieve digital transformation through APIs. Future updates will include trial and easy integration features.

The platform's "Free" section compiles a large number of truly free APIs, and other APIs also clearly state the API call costs.

1. RapidAPI RapidAPI is a leading API platform designed to provide developers with convenient API discovery, integration, and management services. As a global API marketplace, RapidAPI brings together thousands of APIs from different providers, covering a wide range of technologies and application fields.

RapidAPI is not only a top API marketplace overseas but also has an active developer community where users can exchange experiences, solve problems, and get support. At the same time, the platform also offers a large number of free APIs for developers to use quickly.

1. GitHub – public-apis
   This GitHub repository "public-apis" offers a carefully curated list of free APIs for software and web development. It covers various types of APIs, including commercial, entertainment, and data. The repository is well-structured with categories such as "Authentication & Authorization," "Books," "Games & Comics," etc., making it easy for developers to find suitable APIs. Each entry provides a link to the API documentation and indicates whether authentication is required.

2. Xiaorou
   The Xiaorou API platform provides free API call services and regularly updates new interfaces. The latest updates include various APIs, such as Baidu text-to-speech, QQ high-quality lossless music, global weather index, and random password generation. The platform is supported by several well-known service providers, including Tencent Cloud, ByteDance, Alibaba Cloud, and Huawei Cloud. The platform's original intention is public welfare, with a daily call volume reaching tens of millions. It is operated by a university student aiming to provide public service.

3. Free API.com
   The Free API website collects and provides various free API interfaces, covering speech technology, image recognition, weather environment, music search, and more. Users can find and use these free interfaces on the platform, which is updated monthly to provide the latest API resources. Additionally, the website lists popular API interfaces, such as Toutiao hot topics, Bilibili hot searches, and random astronomical images.

4. Shanhe API
   Shanhe API provides stable and fast free API data interface services, with servers adopting domestic high defense, ensuring stable operation. Currently, it includes 142 interfaces covering multiple fields. The platform is dedicated to providing users with high-quality free API services, helping developers easily access the data they need.

Summary
Free API platforms are particularly favored by small and medium-sized enterprises and independent developers because they offer powerful functional support without increasing costs. These platforms cover various application scenarios, from data access and payment processing to social media integration, allowing developers to focus on core business logic without having to build the infrastructure from scratch. Additionally, these platforms typically have rich documentation and community support, further lowering the barriers to use and enhancing development efficiency.