Phase 4Phase 4: Build Real Things

Tool Calling & Function Calling

Make AI take real actions — call APIs, query databases, run code, search the web. The bridge between language models and the real world.

6 lessonsadvanceddevelopment

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Course Lessons

What Tool Calling Is and How It Works

Lesson 1 · Written

Writing Your First Function Schema

Lesson 2 · Written

Chaining Tool Calls — Multi-Step Actions

Lesson 3 · Written

Real-World Tools — APIs, Databases & Web Search

Lesson 4 · Written

Error Handling & Fallbacks in Tool Calls

Lesson 5 · Written

Building a Full Tool-Calling Agent

Lesson 6 · Written