Artificial Intelligence

Function Calling: Bridging LLMs to APIs

This is the hands of the agent. Without function calling, AI can only talk; with it, AI can do. Define an OpenAPI schema that lets an agent autonomously check warehouse stock and email a supplier when a threshold is met.

Level: IntermediateArtificial Intelligence

What You'll Learn

Function calling vs tool use concepts
Defining functions with JSON Schema
OpenAI and Anthropic function calling APIs
Parsing and executing function call results
Chaining multiple function calls in one turn
OpenAPI schema for warehouse stock + email flow
Error handling and retry logic for tool calls

What's Included

🧭AI Tutor🔒

Interactive learning path with AI-generated lessons read aloud by your personal tutor

🧪Practice Lab🔒

Step-by-step lab instructions with AI guidance — run in your own IDE or sandbox.

🎙️Mock Interviews🔒

AI interviewer asks tailored questions, gives real-time feedback and a score report

📝Evaluation🔒

MCQ questions (theory, practical, code) to test your knowledge and earn a badge

⚔️Challenge AI🔒

Compete head-to-head against AI on real production problems — judged on correctness, performance, scalability, code quality, and edge cases

Course Syllabus

Module 1: Function Calling Fundamentals

  • •What function calling is and why it matters
  • •JSON Schema: name, description, parameters
  • •How the LLM decides when to call a function
  • •Parsing the function call response from the API
  • •Parallel function calls in a single LLM turn

Module 2: Connecting to Real APIs

  • •Wrapping a REST API as a callable function
  • •Authentication: API keys and OAuth in function wrappers
  • •Structured vs unstructured return values
  • •Injecting function results back into the conversation
  • •Rate limiting and error handling in tool calls

Module 3: Warehouse Stock + Supplier Alert

  • •Designing the OpenAPI schema for stock check and email
  • •Agent loop: check stock → decide → email supplier
  • •Threshold logic inside the function layer
  • •Testing with mock and live API endpoints
  • •Capstone: autonomous supplier alert agent

You're all set

Everything in this course is unlocked.

Continue Learning →
✓AI Tutor
✓Practice Lab
✓Mock Interviews
✓Evaluation
✓Challenge AI