Udemy

RAG Agents: Build Apps & GPTs with APIs/MCP, LangChain & n8n

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  • 6,582 Students
  • Updated 11/2025
4.7
(580 Ratings)
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Course Information

Registration period
Year-round Recruitment
Course Level
Study Mode
Duration
18 Hour(s) 3 Minute(s)
Language
English
Taught by
Arnold Oberleiter
Rating
4.7
(580 Ratings)
2 views

Course Overview

RAG Agents: Build Apps & GPTs with APIs/MCP, LangChain & n8n

AI Agents & LLMs with RAG: n8n, LangChain, LangGraph, Flowise, MCP & more – with ChatGPT, Gemini, Claude, DeepSeek & Co.

One of the most important concepts in the AI world is "RAG" – Retrieval-Augmented Generation!

You need to give LLMs knowledge!

But how do you build powerful RAG chatbots and intelligent AI agents to optimize your business processes and personal projects?

In this course, you’ll learn exactly that—comprehensively and clearly explained—using ChatGPT, Claude, Google Gemini, open‑source LLMs, Flowise, n8n, and more!

Fundamentals: LLMs, RAG & Vector Databases
Build a solid foundation for your AI projects:

  • Deepen your knowledge of LLMs: ChatGPT, Claude, Gemini, Deepseek, Llama, Mistral, and many more.

  • Understand how Function Calling and API communication work in LLMs.

  • Learn why vector databases and embedding models are the heart of RAG.

  • Master the ChatGPT interface, GPT models, settings, and the OpenAI Playground.

  • Explore key concepts like Test‑Time Compute (e.g. OpenAI o1, o3; Deepseek R1).

  • Discover how Google’s NotebookLM works and leverage it effectively for RAG projects.

Simple RAG Implementations with ChatGPT & Custom GPTs
Get your first AI applications up and running quickly and easily:

  • Create your very first RAG bot from PDFs using Custom GPTs.

  • Turn HTML web pages and YouTube videos into interactive RAG chatbots.

  • Train ChatGPT on your personal writing style via RAG.

  • Use CSV data to build smart chatbots and explore the full potential of Custom GPTs.

RAG with Open‑Source LLMs: AnythingLLM & Ollama
Dive into the world of local AI:

  • Install and use Ollama: learn about models, commands, and hardware requirements.

  • Integrate AnythingLLM effectively with Ollama—optimize chunking and embeddings.

  • Build local RAG chatbots and precisely control language and behavior with system prompts and temperature settings.

  • Leverage agent capabilities like web search, scraping, and more.

Flowise: RAG with LangChain & LangGraph Made Easy
Harness the power of the OpenAI API for professional applications:

  • Master the OpenAI API, pricing models, GDPR compliance, and project setup.

  • Build efficient RAG applications via the OpenAI Playground and response APIs.

  • Install Flowise, manage updates, and become proficient with its interface—including the Marketplace and OpenAI Assistant.

  • Create comprehensive RAG chatflows with web scraping, embeddings, HTML splitters, and vector databases.

  • Develop your own chatbot UI and handle Flowise’s technical details.

  • Implement local AI security with Ollama & LangChain and use Flowise’s tool‑agent nodes (e.g. email, calendar, Airtable).

  • Combine Pinecone vector databases with Supabase and Postgres.

  • Master prompt engineering and sequential agents with human‑in‑the‑loop workflows.

n8n: Building AI Automations & RAG Agents
Use n8n as a powerful automation platform for your AI projects:

  • Learn local installation, updates, and n8n basics.

  • Automate Pinecone database updates via Google Drive.

  • Develop RAG chatbots with AI‑agent nodes, vector databases, and supplementary tools.

  • Create automated chatbots from websites using HTML requests and scraping.

Hosting, Selling & Monetizing Your RAG Agents
Take your AI projects to market professionally:

  • Host Flowise and n8n apps on platforms like Render and embed them in websites (HTML, WordPress).

  • Design branded, professional chatbots and offer them as services or standalone products.

  • Develop effective marketing and sales strategies for your AI agents.

Advanced Workflows & Specialized RAG Techniques
Adopt professional, cutting‑edge technologies:

  • Learn advanced techniques like webhooks, MCPs with Claude, GPT Actions, and n8n integration.

  • Understand the Model Context Protocol (MCP) and build both MCP servers and clients in n8n and Claude Desktop.

  • Explore innovative RAG strategies such as Cache‑Augmented Generation (CAG), GraphRAG (Microsoft), LightRAG, and Anthropic’s Contextual Retrieval.

  • Optimize chunking, embedding, and Top‑K retrieval for your RAG apps.

  • Choose the right strategy for your projects and maximize your RAG outcomes.

Security, Privacy & Legal Foundations
Protect your AI projects effectively:

  • Recognize security risks (Telegram exploits, jailbreaks, prompt injections, data poisoning).

  • Secure your AI against attacks and respect copyrights in generated content.

  • Deepen your understanding of GDPR and the upcoming EU AI Act to ensure legal compliance.

Become an expert in AI automations, AI agents & RAG!
By the end of this course, you will be fully equipped to build, optimize, and successfully market RAG chatbots, AI agents, and automations.

Course Content

  • 10 section(s)
  • 104 lecture(s)
  • Section 1 Introduction: Tips, Course Overview & the Easiest Start with RAG – NotebookLM
  • Section 2 Fundamentals: LLMs, RAG, Vector Databases & the ChatGPT Interface Explained
  • Section 3 Hands‑On RAG with ChatGPT and Custom GPTs
  • Section 4 Implementing RAG with Open‑Source LLMs: AnythingLLM & Ollama
  • Section 5 RAG Chatbots & Agents with the OpenAI API: LangChain & LangGraph in Flowise
  • Section 6 Building RAG Chatbots & Agents with n8n
  • Section 7 RAG Apps with Flowise & n8n: Hosting, Self-Hosting & Selling Made Easy
  • Section 8 Advanced Workflows: Webhooks, MCPs, Claude, GPTs, RAG & Chunking Strategies
  • Section 9 Challenges, Security and Copyrights in RAG Agents
  • Section 10 What’s Next?

What You’ll Learn

  • Introduction to RAG workflows & tools like Google’s NotebookLM with essential tips
  • LLM fundamentals & RAG technologies: ChatGPT, Claude, Gemini, Deepseek, Llama, Mistral, xAI, Grok, Function Calling, vector databases, embeddings & chunking
  • ChatGPT basics & model management: interface, models, settings, GPTs, OpenAI Playground & test‑time compute
  • Building RAG chatbots with Custom GPTs: data preparation from PDFs, HTML webpages, YouTube videos, CSV data sources & writing‑style adaptation
  • Open‑source RAG with Ollama & AnythingLLM: installation, models, optimizing chunking & embeddings & creating a local bot
  • Agent capabilities & multi‑LLM integration: system prompts, temperature control, web search, scraping & AI‑agent features with Flowise/LangGraph
  • OpenAI API & Flowise for RAG agents: pricing, project setup, GDPR compliance, Playground vs. Response API, Node.js installation, Marketplace & OpenAI Assistant
  • Advanced Flowise workflows: web scraping, embeddings, vector databases, HTML splitter, JSON import/export & tool agents (email, calendar, Airtable, webhooks)
  • Custom chatbot UI & self‑hosting: frontend development, Ollama & LangChain, hosting on Render, Replit branding, WordPress integration & Flowise configuration
  • RAG agents with n8n: local installation, interface, triggers/actions, Pinecone automation via Google Drive, workflows & AI‑agent node
  • Combining & marketing Flowise & n8n: RAG lead‑bots, website integration, CSS branding, sales, marketing, customer acquisition & offer strategies
  • Special RAG strategies: n8n MCPs with Claude Desktop, webhooks, GPT Actions, cache‑augmented generation, GraphRAG, LightRAG & contextual retrieval
  • Security, data protection & legal framework: jailbreaks, prompt injections, data poisoning, censorship, GDPR basics, EU AI Act & copyright
  • Strategies of leading AI providers & comparison: OpenAI, Anthropic, Microsoft, Google xAI, Meta’s LlaMA, Deepseek, Mistral & others

Reviews

  • M
    Mohammed Youssef
    3.0

    I gave this course three not because of the structure or depth of the contents, they are amazing, and not because of the instructor style of teaching or depth of knowledge, they are amazing as well, but because flowise agentflows got a massive upgrade now it V2, but the course is still on V1, so now I watch the instructor's lecture @ the course, then head to youtube to update the concepts I 've learned here to the new contents on youtube, Pls upgrade

  • G
    Guillermo Muñoz
    4.5

    The course information is amazing, I just wish the subtitles were correct, sometimes they are wrong

  • R
    Riccardo Bruno
    5.0

    The course provides a solid theoretical foundation while offering helpful guidance for those interested in deeper exploration. At the same time, it is highly practical, enabling you to build your own RAG applications and agents.

  • S
    Scott Wojan
    1.0

    This course is so bloated and unfocused. The use of MS Paint vs proper visuals is terrible. This course could be 1/4 as long as it is and still cover the same information. All of the Flowise stuff is using the old builder.

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