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.
Soniox API provides an AI-assisted audio workflow for creators, developers, researchers, or teams working with...
Freemium
Free plan API
SpicyChat provides conversational AI assistance for users who want interactive answers, follow-ups and task-fo...
Freemium
Free plan API
Stable Audio provides text to audio for creators, businesses, educators, and developers who need practical aud...
Freemium
Free plan API
An API tooling platform for generating SDKs and client libraries from API definitions with consistent develope...
Paid
Free plan API
AI assistant built around educator workflows such as lesson planning, resource generation and assessment suppo...
Freemium
Free plan API
Weights & Biases helps developers machine-learning development platform for experiment tracking, evaluation, d...
Freemium
Free plan API
WireMock helps developers api mocking and service virtualization tool for testing applications against control...
Free
Free plan API Open source
Ada provides conversational AI assistance for users who want interactive answers, follow-ups and task-focused...
Freemium
Free plan API
Adobe Firefly helps creators generate, edit, or enhance images for practical design and visual-content tasks.
Freemium
Free plan API
Airtable AI provides conversational AI assistance for users who want interactive answers, follow-ups and task-...
Freemium
Free plan API
Amazon Translate supports translation api for teams that need a practical business workflow.
Freemium
Free plan API
Artisan Ava provides conversational AI assistance for users who want interactive answers, follow-ups and task-...
Freemium
Free plan API
AutoGen helps developers framework for building applications where multiple ai agents collaborate on software...
Free
Free plan API Open source
Backyard AI provides conversational AI assistance for users who want interactive answers, follow-ups and task-...
Freemium
Free plan API
Botpress provides conversational AI assistance for users who want interactive answers, follow-ups and task-foc...
Freemium
Free plan API
Structured language-learning platform with AI-supported practice and community feedback. It is designed for pr...
Freemium
Free plan API
Cerebras Cloud provides AI development or engineering capabilities.
Paid
API
Cleanvoice AI provides podcast cleanup for creators, businesses, educators, and developers who need practical...
Freemium
Free plan API
Convex helps developers backend platform for typescript applications with reactive data, server functions, and...
Freemium
Free plan API
Deepgram provides speech AI API for creators, businesses, educators, and developers who need practical audio w...
Paid
API
Diagram provides AI-assisted capabilities for modern software or AI workflows.
Paid
API
Dzine helps creators generate, edit, or enhance images for practical design and visual-content tasks.
Freemium
Free plan API
Digital curriculum, assessment and learning platform for schools using personalized and data-driven learning.
Paid
API
AI inference platform for developers building applications with hosted open models, structured outputs, and ag...
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.
