Get a fully built, intelligent AI agent tailored to your business — powered by GPT, LangChain, and n8n automation, delivered with source code and ready to deploy.
I Will Build Custom AI Agents and GPT Workflows with n8n
A single-task AI agent built with GPT, complete with prompt design, integration, and end-to-end testing.
- Single-task AI agent using GPT
- AI LLM model integration
- Retrieval-Augmented Generation (RAG)
- Pre-set conversational journey
- User authentication included
- Full source code delivered
A more capable, multi-feature AI agent with expanded automation and broader workflow scope.
- Everything in Starter Agent
- Extended AI workflow automation using n8n
- AI LLM model integration with enhanced prompt architecture
- Retrieval-Augmented Generation (RAG) pipeline
- Pre-set conversational journey with context handling
- Full source code and setup documentation
A full-scale, enterprise-ready AI agent with CRM/database integration and multi-language support.
- Everything in Boost Agent
- Integration with CRM or database of your choice
- Multi-language support built in
- Retrieval-Augmented Generation (RAG) with custom data sources
- User authentication and access control
- Full source code plus deployment-ready build
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Key details about this service to help you decide. Generated by Zinn Hub, not the seller.
Value Position
Tech Stack
Source Code Included
CRM & Database Integration
Delivery Timeline
What You'll Receive
Full Description
Stop doing manually what a smart AI agent can handle for you. Whether you need to automate customer support, enrich leads, build a knowledge retrieval system, or launch a GPT-powered assistant inside your product, this service delivers a fully functional, production-ready AI agent built specifically around your business requirements.
Based in London, England, Zinn Digital specialises in building scalable, intelligent AI workflows using the most capable tools available today — including n8n, LangChain, OpenAI GPT-4, Model Context Protocol (MCP), and custom APIs. Every agent is built from the ground up to match your use case, not copied from a template.
**What can be built for you:**
Autonomous AI agents with memory and reasoning capabilities. GPT-powered assistants for customer support, content, or internal operations. AI workflow automation pipelines using n8n. Data enrichment and email agents. Retrieval-Augmented Generation (RAG) applications that answer questions from your own documents and data. Voice and chat agents with personality and persistent context. SaaS MVPs combining GPT, LangChain, and vector databases. Integrations with platforms including OpenAI, Pinecone, Supabase, and Airtable.
**How it works:**
After you place your order, share a clear brief describing your use case, the task the agent needs to perform, and any platforms or data sources it should connect to. The team will review your requirements, ask any clarifying questions via order chat, then get to work designing the prompt architecture, building the integration, and testing the agent end to end. You receive full source code and setup documentation with every tier.
**Who this is for:**
Business owners who want to automate repetitive tasks without hiring a developer team. Startups validating an AI-powered product or MVP. Marketing and operations teams looking to connect AI to their existing tools and data. Developers who want a specialist to architect and build a complex agent they can then maintain themselves.
**Why Zinn Digital:**
This team works exclusively with AI agent development and generative AI engineering — it is not a side offering. The tech stack spans LangChain, AutoGen, CrewAI, OpenAI, Claude, Gemini, Mistral, Hugging Face, Pinecone, Weaviate, Supabase, PostgreSQL, React, Next.js, and Streamlit. Every package includes source code so you are never locked in. The entry tier is deliberately scoped to be fast and focused; the larger tiers add integration depth and language reach for teams with more complex requirements.
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Compare Packages
| Feature | Starter Agent | Boost Agent | Premium Agent |
|---|---|---|---|
| Delivery Time | 6 days | 14 days | 21 days |
| Revisions | 0 | 0 | 0 |
| Single-task AI agent using GPT | ✓ | ✕ | ✕ |
| AI LLM model integration | ✓ | ✕ | ✕ |
| Retrieval-Augmented Generation (RAG) | ✓ | ✕ | ✕ |
| Pre-set conversational journey | ✓ | ✕ | ✕ |
| User authentication included | ✓ | ✕ | ✕ |
| Full source code delivered | ✓ | ✕ | ✕ |
| Everything in Starter Agent | ✕ | ✓ | ✕ |
| Extended AI workflow automation using n8n | ✕ | ✓ | ✕ |
| AI LLM model integration with enhanced prompt architecture | ✕ | ✓ | ✕ |
| Retrieval-Augmented Generation (RAG) pipeline | ✕ | ✓ | ✕ |
| Pre-set conversational journey with context handling | ✕ | ✓ | ✕ |
| Full source code and setup documentation | ✕ | ✓ | ✕ |
| Everything in Boost Agent | ✕ | ✕ | ✓ |
| Integration with CRM or database of your choice | ✕ | ✕ | ✓ |
| Multi-language support built in | ✕ | ✕ | ✓ |
| Retrieval-Augmented Generation (RAG) with custom data sources | ✕ | ✕ | ✓ |
| User authentication and access control | ✕ | ✕ | ✓ |
| Full source code plus deployment-ready build | ✕ | ✕ | ✓ |
Portfolio
Examples of the seller's work related to this Zinn.
Build Custom AI Agents and GPT Workflows with n8n
Build Custom AI Agents and GPT Workflows with n8n
Extra Information
Tools I Use
Perfect For
My Process
Frequently Asked Questions
A wide range — including agents for email automation, customer support, content creation, knowledge retrieval from your own documents, lead generation, and task execution. The tech stack includes LangChain, n8n, MCP, and integrations with OpenAI, Claude, Gemini, and more.
Not at all. The team builds an intuitive interface or provides clear written instructions so you can operate the agent confidently, regardless of your technical background.
Yes. Any platform that exposes an API can be connected using n8n or custom webhooks. Mention the platforms you need during the requirements stage and the team will confirm compatibility.
MCP (Model Context Protocol) gives AI agents persistent memory, contextual understanding, and structured task management — making them significantly smarter and more autonomous over time. Whether it is needed depends on your use case; the team will advise after reviewing your brief.
Yes, every tier includes full source code. You own what is built. Setup documentation is included as standard, and the Premium tier adds a deployment-ready build.
A clear description of the task or workflow you want the agent to handle, any platforms or data sources it should connect to, and any relevant context about your business or users. The more detail you provide, the faster the team can begin without back-and-forth.
All agents are tested end-to-end before delivery. If something does not function as scoped and agreed, raise it in the order chat and the team will resolve it. Please note that revisions for scope changes beyond the original brief may require a separate arrangement.
The stack includes OpenAI GPT-4, Claude, Gemini, Mistral, and Hugging Face models; LangChain, AutoGen, CrewAI, and AutoGPT frameworks; Pinecone, Weaviate, Supabase, and PostgreSQL for vector and relational data; and React, Next.js, and Streamlit for front-ends where needed.
Customer Reviews
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Really great work from this freelancer and great communication throughout. He made sure everything was exactly how I wanted it and did a great job. Thank you!
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