These tools expose an API, so you can call them from your own code rather than working through their interface. This is the list to start from if you are building AI into a product, a script or an automation.
Bolt helps developers with AI-assisted coding, code understanding, and practical software development tasks.
Freemium
Free plan API
Chegg Study provides student study service with homework explanations, worked problems, and AI-assisted suppor...
Paid
API
CodePlan provides AI-assisted capabilities for software development.
Freemium
Free plan API Open source
CodeRabbit helps developers with AI-assisted coding, code understanding, and practical software development ta...
Freemium
Free plan API
Continue helps developers with AI-assisted coding, code understanding, and practical software development task...
Free
Free plan API Open source
Durable AI Website Builder provides AI-assisted capabilities for modern software or AI workflows.
Paid
API
An open-source framework for building AI-powered applications with model integrations, flows, tools, and struc...
Free
Free plan API Open source
Google AI Studio helps users with Gemini playground through an interactive AI chat experience.
Free
Free plan API
Google Cloud Workbench provides AI-assisted capabilities for developers, AI engineers, or software teams.
Paid
API
Hugging Face Inference provides AI-assisted capabilities for developers and software teams.
Freemium
Free plan API
Automation service for connecting apps, devices, and online services through triggers and actions.
Freemium
Free plan API
Khoj provides conversational AI assistance for users who want interactive answers, follow-ups and task-focused...
Freemium
Free plan API
Kodus helps developers open-source ai code review tool for pull requests with repository context and configura...
Free
Free plan API
LibreChat helps users with multi-provider chat through an interactive AI chat experience.
Free
Free plan API Open source
LongShot AI helps writers turn topic, outline, keywords, or source information into articles, outlines, and re...
Freemium
Free plan API
Luma helps creators generate, edit, or enhance images for practical design and visual-content tasks.
Freemium
Free plan API
MarsCode helps developers with AI-assisted coding, code understanding, and practical software development task...
Freemium
Free plan API
Microsoft Copilot Studio provides AI-assisted capabilities for developers, AI engineers, or software teams.
Paid
API
Mistral Studio helps users with Mistral developer console through an interactive AI chat experience.
Paid
API
n8n helps developers workflow automation platform with ai nodes, integrations, and self-hosting support..
Free
Free plan API Open source
Nat.dev provides conversational AI assistance for users who want interactive answers, follow-ups and task-focu...
Freemium
Free plan API
NVIDIA AI Workbench provides AI-assisted capabilities for developers, AI engineers, or software teams.
Paid
API
OpenAI Playground helps users with model playground through an interactive AI chat experience.
Paid
API
Peppertype.ai helps writers turn topic, brief, product details, or existing copy into marketing text, blog sec...
Paid
API
What to check before you choose
Having an API is the start of the question rather than the end of it. Rate limits, pricing per call, whether there is a sandbox to develop against, and whether your inputs are retained or used for training all vary enormously, and all of them shape whether a tool is viable at scale. Official API documentation is the only reliable source for those details, and it changes often — treat this list as a way to find the candidates, then verify the specifics with the vendor before you build.
