n8n Workflow Not Working? We Build and Fix It.
Webhooks that never fire, a WhatsApp bot that stopped replying, an AI agent that ignores its tools, or a process you still do by hand? Our engineers build, fix and look after your n8n workflows, on your server or ours.
From $15 at store prices, no contract.
- Packages from $149
- Engineer time $28 an hour
- Published n8n creator
n8n
Workflows, Setup or Server: Which Do You Need?
This page is about the workflows themselves: the logic that moves your data, sends your messages and calls your AI models. If the problem is the n8n server, one of the other two fits better.
Workflows built or fixed
A new automation, a run that keeps failing, an AI agent that ignores its tools, or a move from Zapier or Make. We work on the workflow logic.
You are on this page. Packages from $149.
n8n installed and kept running
n8n set up on a server: HTTPS, the webhook address, PostgreSQL, the encryption key, backups and updates tested before they reach live workflows.
n8n setup service, from $50A server to run n8n yourself
A KVM VPS with full root access in our USA data centre. Our team installs n8n on it for free on request, with a basic workflow template to start from.
n8n VPS hosting, from $10/moFix, Build or Look After.
Pay by the hour for a quick fix, choose a fixed package for a new build, or keep an engineer on a monthly plan. Prices shown in your currency.
Scripting Service
Bash, Perl and Python scripts that automate server tasks alongside your workflows, such as clean-ups and file exports.
Engineer time, 1 hour
A workflow that stopped, a webhook that never fires, a node error you cannot read: an engineer finds and fixes it.
Developers, 140 hours a month
A developer on your workflows for 140 hours a month: new automations, custom nodes and API work as your business grows.
Starter workflow
One custom workflow with up to 5 app integrations, error handling and notes on how it works, plus 7 days of support after delivery.
Professional
Up to 5 workflows, n8n set up on your server, alerts when a run fails, and 30 days of bug fixes after delivery.
Enterprise
Larger projects: many workflows, custom nodes, a move from Zapier or Make, and 60 days of support after delivery.
Why n8n Workflows Break in Production.
Building a workflow is the easy part. These are the problems teams run into once real customers and real money depend on it.
Failures nobody notices
A run fails at night and you hear about it from a customer. We add error workflows and alerts, so a person knows within minutes.
AI agents that guess
An agent finishes "green" after a tool failed and makes up the answer. We test agents on real examples and check every tool result.
Risky actions without approval
Refunds, emails to customers or changes to records need a person to approve them first. n8n can now ask before an agent uses a tool.
AI bills that keep growing
Every tool and every long memory adds tokens to each step. We trim prompts, cache where the model allows it and pick the right model per step.
Duplicates and rate limits
Webhooks that fire twice and APIs that block you for asking too often. We add duplicate checks, queues and retry rules.
Updates and security fixes
n8n now publishes security fixes every two weeks, and version 2.0 changed how Code nodes work. We test updates on a copy before your live workflows.
The Latest n8n AI Features, Used Properly.
n8n moves fast, with a new release almost every week; version 2.43 is current as of October 2026. These are the features we build with most.
Approval before an agent acts
Since version 2.6 (January 2026), an AI agent can stop and ask a person before it runs a chosen tool, such as sending a refund.
MCP server and client
n8n can offer your workflows as tools to AI assistants such as Claude, and use other MCP servers as tools inside an agent.
Evaluations
Run an AI workflow against a set of test questions and score the answers, so a prompt or model change is checked before it goes live.
Guardrails
Check what goes into and comes out of a model: block personal data, unsafe text or off-topic requests.
n8n Assistant
Describe a workflow in plain words and n8n drafts it. On a self-hosted server you use your own AI key, so there are no credit limits.
n8n 2.0 foundations
Code runs in a separate sandbox, and edits stay as drafts until you publish them, so a half-finished change never reaches live runs.
Why Teams Trust Us With Their Workflows.
No borrowed logos or invented numbers: things you can check for yourself before you talk to us.
Published n8n creator
Our templates are in the official n8n library: workflow backups to GitHub and AI game reviews by email.
We run servers ourselves
Ucartz has hosted customer servers since 2013 and offers n8n VPS hosting, so we can fix the server under the workflow too.
Staging first, then live
Changes are built and tested on a copy, and each workflow is handed over as documented files you can keep in Git.
Alerts on every build
Every workflow we build has an error alert, so a failure reaches a person, not just a log.
Real engineers, around the clock
Ticket first, then live chat or WhatsApp with the ticket ID, 24/7. No bots in front of the people who fix your workflow.
No lock-in
Your n8n, your workflows, your keys. If you move on, you take everything with you.
What to Send Us, and What We Look For.
A clear request gets a clear quote. And a workflow that real customers depend on needs more than a green tick in the editor.
Before you send us a workflow
- The workflow file. In the editor, open the workflow menu and choose Download to save it as JSON. n8n warns that the file includes credential names and IDs, and that HTTP Request nodes imported from cURL can hold authentication headers, so remove or anonymise those first.
- The failed run. From the Executions list, the error message and the node where it stopped.
- Where it runs. Your n8n version, and whether it is n8n Cloud or your own server.
- A few sample inputs. Two or three typical items, with personal data taken out, and what the result should look like.
What a production-ready workflow has
- An error workflow. It starts with n8n's Error Trigger and is chosen in the workflow's settings. One error workflow can cover many workflows, and the alert carries a link to the failed run and the node that stopped.
- Tests on pinned or mock data. n8n can save a node's output and reuse it, so building and testing do not hit your live systems or use up API limits.
- Big jobs in batches. n8n recommends smaller batches and sub-workflows for large data sets, because a sub-workflow frees its memory once each batch is done.
- A person in the loop where it matters. Since n8n 2.6, an AI agent can be made to wait for a person's approval before it runs a chosen tool, such as a refund or an email to a customer.
- The right runs saved. Failed production runs kept so a fault can be traced, and successful ones only when you need them, so the database does not keep growing.
Want a workflow you already have checked against this list? An engineer can review it at $28 an hour.
What People Build With n8n Every Day.
The automations most requested on the n8n forum and most used in the n8n template library, from small shops to large teams.
A WhatsApp or Telegram assistant
Answers customers from your product details and price list, books appointments and hands over to a person when it is unsure.
Chat with your documents
Staff ask questions in plain words and get answers from your manuals, policies and PDFs, with the source shown.
Leads followed up in minutes
Leads from Meta, Google or your website sent to HubSpot, Zoho or your CRM, scored, and followed up by email or WhatsApp.
Email sorted and drafted
Incoming email sorted by topic, summarised, and a reply drafted for a person to check and send.
Invoices read into accounts
Invoice and bill PDFs read by AI, checked, and entered into your accounts tool or ERP, with odd ones flagged.
Systems kept in sync
Stock, orders and customers kept the same across your shop, ERP and spreadsheets, without copying by hand.
Systems We Work With
- n8n
- WhatsApp Business
- Telegram
- Google Sheets
- HubSpot
- Zoho
- Shopify
- WooCommerce
- Stripe
- Razorpay
- OpenAI
- Claude
- Gemini
- Ollama
- PostgreSQL
- MCP
From Order to Done.
Tell us the job
What you do by hand today, or what is broken, in your own words.
Get a clear quote
A fixed package, or an hourly estimate for a fix.
We build and test
On sample data first, with you checking the results.
Hand over and stay on call
Notes on how it works, and help whenever you need it.
Our engineers, your company name.
Agencies, hosts and IT firms resell or outsource our work as their own service. Your clients deal with you.
No Ucartz branding
We work under your name. Your clients see your company, not ours.
Resell or outsource
Add server administration, development, design or abuse handling to your own catalogue and bill it yourself.
NDA on request
We keep your client relationships and information confidential.
Scale without hiring
Take on more clients without adding staff: book hours, a task or a full month.
Every Ucartz service is 100% white label. Hosting, radio and video streaming run on white-label hostnames, and anything you buy from us, Hire an Expert work included, can be resold or outsourced under your own name.
Real Feedback From the Businesses We Support
See how our engineering support and infrastructure keep real businesses online.
n8n Services plan: we build it, hand it over and stay on call
Getting AI and automation into production takes more than hardware. We design and deploy the whole system on your own server, document it and hand it over. After that, you can call us per task or per hour, with no retainer.
Free Basic Managed Support
Every Ucartz server includes Free Basic Managed Support: complimentary, best-effort help with quick tasks of about 5 minutes, such as access checks, restarts, OS reinstalls and DNS pointing.
What is included →Plug-and-play expert help
Model updates, new workflows, scaling or fixes after handover. From $8 per 15 minutes or $28 per hour, with no monthly commitment.
See on-demand support →AI, automation & custom builds
Private LLMs (Ollama, Llama, Mistral), RAG over your documents, n8n and API automations, GPU/CUDA stacks and custom internal tools.
Plan a project →Frequently Asked Questions
Quick answers about the plans, support and billing.
Get Your n8n Workflows Working
Built, fixed and looked after by engineers who also run the servers they live on. See all our AI and automation solutions.