Top AI tools for API Developer

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$

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$

Conektto is an AI-powered API design platform that simplifies API integration and development through automated code generation, testing, and collaborative features.

• Freemium

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

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

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$

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

• 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

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$

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$

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$

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

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

Mintlify provides a modern documentation platform that is beautiful, easy to maintain, and designed to convert users. It offers features like a web editor, AI assistance, and API playground.

• Freemium

DocDriven is a shared workspace that streamlines API development, offering visual design, real-time collaboration, and AI code generation.

• Free Trial
• From 15$

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

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

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$

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

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

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

• Free

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

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

• Free Trial

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$

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

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

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

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

SpecToMCP enables users to generate Model Context Protocol (MCP) servers directly from OpenAPI specifications, streamlining the API creation process for both humans and artificial intelligence systems.

• Other

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$

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$

Motif is an AI-powered documentation assistant that helps teams maintain and manage technical content at scale.

• Contact for Pricing

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

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

• Freemium
• From 19$

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

• Paid
• From 5$
• API

Grafbase is an enterprise-grade GraphQL Federation platform offering self-hosted deployment, high performance, and AI agent integration for unified API management.

• Free Trial
• From 2999$

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$

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$

Vratix helps developers launch robust Node.js backend services quickly by providing reusable API modules and eliminating boilerplate code. It also plans to introduce an AI programmer for generating services.

• Other

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$

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$

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$

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

• Free

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$

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

• Free

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

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

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

Postlog automates API documentation, transforming code into clear, concise docs for frameworks like Express, Flask, Django, and FastAPI. It leverages advanced LLM technology for speed and accuracy.

• Freemium
• From 10$