Guide

Free AI agent courses for small-business owners

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These 13 courses, official guides, and lectures cost nothing to open. Together they cover what an owner needs to run AI (artificial intelligence) agents: what they are, how to build one, and how to keep one safe. Where a course sells a certificate or keeps labs behind a paid plan, the note says so.

By Agent Lane Editorial · Page dated 18 October 2026 · Links checked 22 October 2026

Start here

AI Fluency for Small Businesses · Anthropic Academy. A simple framework for deciding what to hand an AI and how to check its work, written for small-business staff. No coding; any chatbot works for the exercises.
Introduction to Generative AI · Google Skills. A 45-minute primer on what generative AI is and how it differs from older machine learning.
Introduction to AI in Business · Alison. How AI, machine learning, and automation fit into running a business, and the steps to bring AI in responsibly. About 1.5–3 hours of video. The course is free; the certificate costs extra.
CS50’s Introduction to Artificial Intelligence with Python · Harvard. The ideas under modern AI, from search to machine learning to language models, as a seven-week course. Free through Harvard’s OpenCourseWare; needs some Python.

Build agents

AI Agents Course · Hugging Face. A step-by-step path from what an agent is to building one with common libraries. The certificates are free too; needs basic Python.
AI Agents for Beginners · Microsoft, on GitHub. 18 short lessons with text, code, and videos, taken in any order. Open source; running the code samples needs an Azure account.
5-Day AI Agents Intensive · Kaggle with Google. Whitepapers, podcasts, and codelabs on tools, memory, evaluation, and deployment, now self-paced. Codelabs need a Kaggle account and a Google AI Studio API key.
Agentic AI · DeepLearning.AI. Andrew Ng on four agent patterns (reflection, tool use, planning, and multi-agent) and breaking a business process into agent steps. Videos are free to audit; quizzes, labs, and the certificate need the paid Pro plan.
Prompt engineering overview · Claude docs, Anthropic. How to write clear instructions for any agent, with links to free interactive tutorials.

Run them safely

Building effective agents · Anthropic. When you do not need an agent at all, and why simple setups with stopping conditions hold up best. Published December 2024; Anthropic notes some of the tools named have changed.
A practical guide to building agents · OpenAI, PDF. A 34-page guide whose guardrails chapter shows how to layer checks and plan for when a person must step in.
Top 10 for LLM Applications (2025) · OWASP. Plain names for the main risks, including prompt injection, excessive agency, and runaway usage (“unbounded consumption”).
Building Trustworthy AI Agents (lesson 6) · Microsoft, on GitHub. Instruction rules, common threats, and a human approval step before an agent acts.

How to use this list

Finish one Start here course. If you do not code, take AI Fluency for Small Businesses.
Pick one Build agents course and stay with it. Finish it before you start another.
Read the Run them safely list before an agent touches anything real. That means email, money, customer data, or anything it can publish.
Set limits, then start small. One agent, one job, with a spending cap and an approval rule in place.

After the course

Courses teach how agents work. Running one in a business also needs limits:

Agent spend caps. Per-payment, daily, and monthly limits, sized with the spend cap calculator.
Approval rules. What an agent may do alone and what waits for your yes.
Testing before real access. A dry run before an agent gets live accounts.
Prompt injection. How hidden instructions in emails and web pages trick agents.
A one-person company with AI bots. One job per bot, a handbook you own, and quiet routines.

Frequently asked questions

Are these AI agent courses really free?

Yes. All 13 were free to open when checked in October 2026. Optional extras, such as certificates, graded labs, or cloud accounts for code samples, can cost money.

Do I need to know how to code?

Not for AI Fluency for Small Businesses or Google’s Introduction to Generative AI. Most courses under Build agents expect basic Python.

Is Harvard’s AI course free?

Yes. Harvard’s CS50 site says anyone can take CS50’s Introduction to Artificial Intelligence with Python for free through OpenCourseWare. A verified edX certificate costs extra ($299 on Harvard’s course listing, 18 October 2026).

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