Top AI tools for API Developer

JSON Studio is a free online tool designed for formatting, validating, editing, and beautifying JSON data with enhanced visualization and conversion features.

• Free

jsonAI is a powerful tool that converts various data formats into structured JSON using AI, offering customizable schemas and dedicated API endpoints for seamless integration.

• Freemium
• From 3$

liblab empowers developers to instantly generate custom SDKs, streamlined documentation, and AI-driven interfaces for APIs, enhancing efficiency and user experience.

• Usage Based
• From 5$

HTTPie is a user-friendly API testing client available for both terminal and desktop environments, designed to simplify interaction with HTTP servers, RESTful APIs, and web services.

• Freemium

Qodex.ai is an AI-powered API testing platform that automates end-to-end testing processes with zero coding required, offering comprehensive test coverage and auto-healing capabilities for enterprise-level QA efficiency.

• Freemium
• From 199$

Stoplight is a comprehensive platform for designing, documenting, and building high-quality APIs, providing an intuitive workflow for teams of any size. It streamlines API development through a design-first approach, accelerating productivity and improving consistency.

• Free Trial
• From 41$

GraphDev is a comprehensive toolkit designed for GraphQL development, offering debugging, testing, and collaboration features. It incorporates an AI assistant for enhanced schema management and productivity.

• Freemium
• From 14$

Hasura offers a universal data access layer, enabling rapid development and deployment of high-quality APIs for applications and AI initiatives. It simplifies data access, accelerates innovation, and streamlines governance across various data sources.

• Freemium
• From 5$

BuildShip is a low-code visual backend builder that enables developers to create scalable APIs and workflows using AI-powered nodes and pre-built templates without complex coding.

• Freemium
• From 19$

A web-based tool that provides real-time token counting and cost estimation for various Large Language Models (LLMs), including OpenAI's GPT models and Anthropic's Claude models.

• Free

RapidMCP transforms existing REST APIs into AI-agent ready MCP servers without requiring backend modifications, enabling quick integration with AI agents supporting the MCP protocol.

• Freemium
• From 12$

MCP Fabric seamlessly turns RESTful APIs into fully hosted, AI-ready MCP servers, enabling quick integration with Large Language Models (LLMs) without complex coding. Streamline API-to-AI connectivity, add context, and leverage advanced telemetry for powerful AI workflows.

• Free Trial
• From 10$

Celerforge uses AI to instantly generate mock APIs, accelerating development cycles and eliminating tedious hand-coding. It's perfect for rapid API prototyping and testing.

• Freemium
• From 8$

Hanabi.rest is an AI-powered platform that allows users to build and deploy REST APIs from natural language and screenshots. It supports multiple runtimes including Cloudflare Workers, Fastly, Deno, and Node.js.

• Usage Based

Yao is a free, open-source application engine enabling developers to build web apps, REST APIs, and business solutions faster with integrated AI code generation and development tools.

• Free

hapi is a secure, enterprise-grade Node.js framework designed for building scalable, high-quality backend applications with minimal overhead and extensive out-of-the-box functionality.

• Free

MCP Server Hub is a central repository for discovering and implementing Model Context Protocol (MCP) servers, designed to connect Large Language Model (LLM) applications with external data sources and tools.

• Free

Sparrow is an AI-enhanced API testing and collaboration platform designed to streamline development workflows. It supports REST, WebSocket, Socket.IO, and GraphQL protocols, offering automated testing, AI assistance, and secure team collaboration features.

• Freemium
• From 10$

Monoid is an open-source platform that transforms APIs into AI Agents, enabling LLMs to gain context and perform real-time actions through a seamless and customizable interface.

• Free Trial

Gravitee is an advanced API management platform that consolidates the management of APIs, event streams, and agentic AI systems, enabling secure, fast, and unified governance across multiple gateways and brokers.

• Paid
• From 1250$

RoostGPT is an AI-powered testing co-pilot that automates test case generation, providing 100% test coverage while detecting static vulnerabilities. It leverages Large Language Models to enhance software development efficiency and reliability.

• Paid
• From 25000$

Aipify is a platform that enables developers to create intelligent APIs without coding, leveraging Large Language Models to provide structured GPT responses through an easy-to-use API interface.

• Freemium

AI Placeholder is a versatile API service that uses OpenAI's GPT-3.5-Turbo to generate customizable dummy data for testing and development purposes. It offers both hosted and self-hosted solutions for generating realistic mock data.

• Free

Yugo is a platform that simplifies the integration of AI functionalities into web services, reducing development time and complexity.

• Free

FlowTestAI is a GenAI-powered Open Source IDE designed for crafting, visualizing, and managing API-first workflows. It offers a fast, lightweight, and localized solution for seamless API integration and enhanced privacy.

• Other

Cruderra is an AI-powered technical documentation platform that helps engineering teams streamline documentation creation, code modernization, and developer onboarding through automated scanning and AI assistance.

• Freemium
• From 28$

AuthGPTs simplifies API security and SaaS deployment with a one-time purchase, offering tools for OAuth2, analytics, and payment integration. It is a cost-effective solution designed to streamline the launch of GPTs as complete SaaS products.

• Pay Once

KeyRunner is a next-generation API design and collaboration platform with robust security features, enabling secure and efficient API management directly within your preferred environment.

• Freemium
• From 39$

Enhance your website's SEO and accessibility with AltText.ai, the premier AI-driven alt text generator.

• Paid
• From 5$
• API

Zudoku is an open-source framework for building highly customizable API documentation using OpenAPI specifications, featuring AI search and static site generation.

• Free

Andes is a comprehensive marketplace platform that connects developers with Large Language Model (LLM) APIs, enabling seamless integration of AI capabilities into applications.

• Contact for Pricing

Prompt Assist provides developers with expertly crafted prompt engineering solutions designed to enhance the effectiveness of AI-powered coding assistants such as ChatGPT, Claude, and GitHub Copilot.

• Other

noSwag is a platform for generating, executing, and monitoring API tests directly from OpenAPI/Swagger specifications. Simplify your API testing workflow from NoCode to ProCode.

• Freemium
• From 9$

SmartBear delivers a comprehensive suite of AI-powered tools for API development, testing, monitoring, and quality assurance to streamline the software delivery lifecycle.

• Free Trial

JsonGPT offers a simple API to generate structured JSON data using various AI models like OpenAI and Gemini. It streamlines AI integration by handling validation, caching, and streaming.

• Freemium

Stainless API automates the creation and maintenance of robust client libraries (SDKs) for various programming languages, saving significant development time and resources.

• Paid
• From 250$

Docuo is a lightweight platform that transforms your static content into interactive documentation websites, including developer hubs, API references, and product guides.

• Free

Traceable AI is a comprehensive API security platform that provides unmatched API discovery, attack detection, and protection through AI-powered contextual analysis and threat hunting capabilities.

• Contact for Pricing

Aptori is an AI Security Engineer that proactively detects application and API vulnerabilities, prioritizes risks using semantic analysis, and automates code fixes to ensure continuous compliance and secure DevOps.

• Contact for Pricing

Line0 is an AI-powered platform designed to generate production-ready backend services in minutes, allowing developers to build and test APIs using natural language instructions.

• Freemium
• From 17$

Postman is a comprehensive platform for collaborative API development, enabling teams to prototype, document, test, and demo APIs in one place.

• Freemium
• From 19$

AI Spend is a cost monitoring platform that helps users track and analyze their OpenAI API usage and expenses, providing real-time insights and notifications to manage API spending effectively.

• Paid

Kodezi is a suite of developer tools that automates code reviews, enhances security, and keeps API documentation in sync with code changes, improving code quality and efficiency.

• Paid
• From 7$

Apollo GraphOS is a GraphQL developer platform that helps teams build, scale, and manage APIs. It offers solutions for faster development, improved quality, and powerful tooling.

• Freemium

JSON Data AI is a tool that converts natural language prompts into API endpoints, allowing users to generate and fetch structured JSON data about any topic.

• Freemium

Testnut is a comprehensive test automation tool for Web, Mobile, API, and Telecom domain testing. It offers features like parallel runs, CI/CD integration, and unlimited test runs, making QA cycles faster and more efficient.

• Contact for Pricing

Treblle is an advanced API observability and management platform that offers real-time documentation, security monitoring, and compliance checking for modern API development.

• Contact for Pricing

Apidog Fast Request is a free IntelliJ IDEA plugin designed to accelerate API development for Java/Kotlin projects by automatically detecting endpoints, filling parameters, and enabling one-click request sending.

• Free

Tadata offers Model Context Protocol (MCP) servers as a service, simplifying integration between developers, AI agents, and digital products.

• Free Trial

quicktype generates models and serializers from JSON, schema, and GraphQL, enabling developers to work with data quickly and safely across various programming languages.

• Free