Build AI Agents: A Step-by-Step Guide to Creating Autonomous Assistants with LangChain, No-Code Tools, and Real-World Workflows

By Klemens Nguyen

Look at TOC:
PART I: FOUNDATIONS 4
Chapter 1: What Is an AI Agent? 4

Definitions, Evolution from Chatbots to Autonomous Agents 4Core Concepts - Memory, Planning, Tools, Autonomy 7Examples in Real Life - How AI Agents Are Already Working for People Like You 11

Chapter 2: Choosing the Right AI Agent Framework 16

AutoGPT, BabyAGI, LangChain, CrewAI, Microsoft Autogen: Which Framework Fits You Best? 16No-Code vs Code-First - Which AI Agent Approach Should You Use? 20Deployment Options - Local, Cloud, and Browser-Based Agents Explained 24

Chapter 3: Tools of the Trade (No-Code & Low-Code Options) 29

AI Agent No Code - Building Smarter, Faster Without Writing Scripts 29OpenAI + Zapier + Voiceflow 33FlowiseAI, AgentHub, Make.com 36Setup Walkthroughs (Free Tiers, API Keys) 41

PART II: BUILD YOUR FIRST AGENT (Keyword: build ai agent, ai agent step by step) 46
Chapter 4: Step-by-Step - Your First Task Agent 46

Use LangChain or Flowise to build a simple "calendar scheduler" agent 46Explain every block, prompt, and loop 50Ai agent tutorial 55

Chapter 5: Adding Tools: Web Search, Email, PDFs & APIs 59

Integrating tools into your agent 59How LangChain's "Tool" and "AgentExecutor" work 63Use cases: email bot, research assistant, PDF summarizer 67

Chapter 6: Memory & Planning Modules 72

Vector memory, context windows, ReAct framework 72Planning sequences of steps across tasks 76

PART III: MULTI-FRAMEWORK APPLICATIONS 81
Chapter 7: LangChain in Depth: Agents, Chains, Tools, Templates 81

End-to-end build: project tracker agent 81Combining agents with human input and APIs 86

Chapter 8: Flowise and Other Visual Builders 91

Build a lead-gen follow-up bot 91Triggered by form submission → reply → summarize conversation 95

Chapter 9: Autonomy and Guardrails 101

Autonomous AI Agent 101How agents loop, self-reflect, and limit hallucination 105Building agents with hard-coded ethical guardrails 108

PART IV: BUSINESS USE CASES 114
Chapter 10: AI Agents for Small Business 114

Automating lead response, quotes, invoices, follow-ups 114ChatGPT + Make.com + Google Sheets + Gmail 118

Chapter 11: Solopreneur Automation Stack 123

AI agent for solopreneurs 123Appointment bots, social media agents, content curators 126No-code templates 130

Chapter 12: Enterprise-Grade Agent Flows 135

Internal knowledgebase assistant 135Approval flow agent with Microsoft 365, Teams, SharePoint 138

PART V: DEPLOYMENT & BEYOND 143
Chapter 13: Deploying Agents to the Web, Slack & Apps 143

Streamlit, FastAPI, Replit, Gradio 143Slack + Discord bots 147Voice agent deployment (ElevenLabs, Whisper, AssemblyAI) 152

Chapter 14: Troubleshooting & Scaling AI Agents 158

Prompt loops, rate limits, memory failures 158API throttling, fallback logic, long-term context limits 162

Chapter 15: The Future of AI Agents & You 167

Personal agents for everyone 167Wearables, voice-first devices, real-time agents 169Where the ecosystem is going in 2025-2026 173

APPENDICES 177

Glossary of AI Agent Terms 177Top 5 Free Agent Templates to Try 180Prompt Library for ReAct, LangChain, and No-Code Builders 183Resources & Tools List (Links + Free Tiers) 186

EPILOGUE 190
Final Invitation 192
Get ready to build the future-one AI agent at a time.

• Format: Paperback
• Language: English
• ISBN: B0FJRTZR29
• ISBN13: 9798293752430
• Release Date: July 2025
• Publisher: Independently Published
• Length: 194 Pages
• Weight: 0.59 lbs.
• Dimensions: 0.4" x 6.0" x 9.0"