API & Integrations Development
Make Your Systems Finally Talk To Each Other
Your CRM does not know what your invoicing tool knows. Your booking system does not tell your shipping software anything. So someone on your team is the messenger, retyping the same order, the same customer and the same status into three places and hoping nothing gets missed. An API is simply the door each of those systems leaves open for other software, and an integration is us walking through it on your behalf. We connect the tools you already pay for so data moves on its own, and we build it so a bad day at the other end does not quietly lose your orders.
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- More Than A DecadeIn The Digital Space
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The Unfair Advantage
Fix The Plumbing Once, Instead Of Hiring The Messenger Forever
What if I tell you the double entry between your CRM and your invoicing tool is not a people problem? It is a plumbing problem, and plumbing only needs fixing once.
Nearly every system you pay for has an API, an agreed way for other software to read from it and write to it. Your payment provider can announce a sale. Your booking tool can hand over a new appointment. Your ERP can accept a new order. They are all ready to talk. Nobody has introduced them, so your team does the talking by hand, with the typos, delays and forgotten updates that come with it.
Can you survive with systems that don’t talk? Yes, plenty of businesses do, right up until the volume doubles or the one person who knows the routine goes on holiday. An integration takes that routine and runs it the same way every time, at 2am and on public holidays, for a one-time build cost rather than a salary. And when an off-the-shelf connector would do the job for a fraction of the price, we will say so and point you there instead.
Advantage #1
Connector Or Custom Code? We Will Tell You Which
Not every integration needs a developer. If both tools are popular and the job is simple, a new booking adds a contact to the CRM, a paid invoice posts to Slack, then a ready-made connector in Zapier, Make or n8n does it in an afternoon, and that is exactly what our workflow automation service is for. We will not talk you into custom code for a job a connector can do.
Custom code earns its place when the connector does not exist, when the data needs reshaping in the middle, when the volume makes per-task pricing silly, or when a wrong record costs real money. Think syncing stock and orders between a store and an ERP, pushing bookings into a legacy system nobody has built a connector for, or matching payments to customers by rules your business invented.
The first thing we do on a call is tell you which bucket you are in. Honestly, that one answer saves more money than anything we build afterwards.
Advantage #2
REST And Webhooks, Explained Without The Jargon
Two words come up in every integration conversation, so here they are in plain English. A REST API is a system’s menu of questions you are allowed to ask it and instructions you are allowed to give it, over the web: “give me customer 123”, “create this order”, “mark this invoice paid”. Nearly every modern tool has one.
A webhook is the other direction. Instead of your integration asking “anything new?” every minute, the system taps it on the shoulder the moment something happens: a payment lands, a booking is made, a shipment is scanned. It is faster, cheaper and the way most of what we build gets triggered.
Between the two sits the middleware, which is the small piece of custom code that listens for the webhook, asks the right REST questions, reshapes the data from one system’s format into another’s and writes it where it needs to go. That piece is what you are paying us to build, and it is built in an account you own.
Advantage #3
Built To Survive The Bad Days
Anyone can connect two systems on a good day. The difference between an integration and a liability is what happens when the other end is slow, down or says no. And it will, because every API has a rate limit, which is a cap on how many requests it accepts per minute before it starts refusing them. Hit it, and a careless integration simply drops the order and moves on.
So we build in retries: when a request fails or gets refused, the integration waits, tries again, and keeps trying with longer gaps until it gets through, without creating the same order twice. Every failure is logged, and anything that cannot recover on its own sends an alert to a human, by email, Slack or Telegram, before a customer notices.
None of this is an upgrade. It is the difference between a system you can forget about and one you have to babysit, and it is part of every integration we build.
Who It's For
Who Needs An Integration
If one of these sounds like your week, there is a connection we can build that makes it stop.
Stores Syncing Orders, Stock And Shipping
Orders in the shop, stock in the ERP, labels in the carrier’s system, and someone keeping all three honest by hand. One integration keeps them in step as each order moves.
Service Businesses With Bookings In One Tool And Clients In Another
Appointments land in the booking app, invoices live in accounting, notes live in the CRM. Connected, a booking creates the client, the invoice and the reminder on its own.
Teams Feeding A CRM By Hand
Leads and payments arrive in five places and someone types them into the pipeline. The CRM side of that is its own service; everything upstream of it, the payments, bookings and systems feeding it, is this page.
Companies With A System Nobody Will Touch
An older ERP, a bespoke database or a supplier portal with no ready-made connector. Custom middleware is how it joins the rest of your stack without being replaced.
What's Included
A Complete Integration, Not A Script On Someone’s Laptop
Every integration includes the mapping before it and the safety net after it.
Integration Audit & Data Map
Which systems, which records, which direction, and what each one calls a “customer”. On one page, approved by you, before anything is connected.
Connector Or Custom Decision
A straight recommendation: a Zapier, Make or n8n connector where that is enough, custom code where it is not, and why.
REST & Webhook Connections
Secure connections to each system’s API, with webhooks wherever a system can announce events itself instead of being asked.
Custom Middleware
The small, well-tested piece of code that reshapes data between systems and applies the rules your business invented. Read and tested by Cylas Tee.
Rate Limits, Retries & Alerts
Requests queued and retried with longer gaps when a system is slow or refusing, never duplicated, and a human alerted when something cannot recover on its own.
Documentation & Handover
A plain-English diagram of what flows where, API keys and accounts in your name, and a recorded walkthrough for your team or your next developer.
Our Integration Process
From Two Systems That Ignore Each Other To One That Just Runs
Fully remote and time zone friendly. Cylas Tee is a Certified ScrumMaster and a PMI Agile Certified Practitioner, so even a two-week integration gets a scope, a design you approve and a demo on real data before it goes live. Most single integrations are typically live within 2–6 weeks.
- 01
Map The Data
We start with a call in your time zone and a look inside both systems. Which records need to move, in which direction, how often, and what each system calls the same thing, because “customer” in your CRM and “account” in your accounting tool are rarely the same shape. We check each API’s documentation and limits, confirm there is a door to walk through, and tell you honestly whether a ready-made connector would do the job. You get a one-page data map and a fixed quote before anything is built.
- 02
Design The Flow
Before connecting anything, you see the whole integration on one page: the trigger, every step, what gets created or updated where, and what should happen when something fails. That last part is the real design work. What if the same order arrives twice? What if the ERP is down for an hour? What if a field is empty? We write the answer to each one down, you approve it, and only then do we build. Changing a box on a diagram takes minutes. Untangling duplicate records in a live system takes a lot longer.
- 03
Build And Test On Real Data
We build the middleware in an account in your name, connect it to each system’s test or sandbox environment, and run it on real-shaped data on purpose: the messy address, the refund, the customer who exists in one system and not the other. You watch a recorded demo of records moving, not a slide about it, and we adjust until you would trust it with a live order. Honestly, this is the simplest step. The thinking already happened.
- 04
Go Live And Monitor
We switch the integration to the live systems, usually in a quiet window, with logging and alerts pointed at you from the first minute. Then we watch it for a couple of weeks of real traffic, because real customers always find a case the tests did not, and tune it. After that you get the diagram, the walkthrough and the keys, and you choose: run it yourself, or keep us on and we keep it monitored and growing as your systems change, quoted monthly.
API & Integrations Development Pricing
Mapped First, Then One Fixed Quote
Every integration is custom, because no two businesses use the same two systems the same way. So we map the data first and give you one fixed quote before anything is connected.
If you’re looking for a “cheap” or a quick one-and-done connection, a Zapier connector is probably the right answer and you may not need us at all; our workflow automation page will tell you.
What we quote here is the custom piece: middleware that matches records correctly, survives rate limits and outages, never creates the same order twice, and tells you when something needs a human.
That takes a proper look at both systems, and a quote based on your data rather than a menu. The way in is a short call or the free website audit. Tell us which two tools your team keeps copying between, and you will have a fixed price in writing before anything starts.
Custom Quote
One integration between the systems you already use, mapped, built, tested on real data and monitored, in accounts you own.
Custom Quote
- Integration audit & one-page data map
- Connector or custom-code recommendation
- REST API & webhook connections
- Custom middleware in Node.js
- Rate limits, retries & duplicate protection
- Logging, alerts & monitoring
- Documentation & recorded walkthrough
We scope first, then quote one fixed price before work starts. Hosting, automation platform subscriptions and any API fees charged by the systems you connect are paid directly by you. Builds: 50% deposit, 50% on launch.
FAQ
Frequently Asked Questions
Straight answers to the questions we hear most. If yours is not here, just ask.
What Is An API, In Plain English?
What Is A Webhook, And How Is It Different From An API?
When Is Zapier Or n8n Enough, And When Do I Need Custom Code?
What Is A Rate Limit?
What Happens When One Of The Systems Is Down?
Which Systems Can You Connect?
What If One Of My Systems Has No API?
How Long Does An Integration Take?
Our Guarantees
Promises We Put In Writing
We would rather work for free than see an unhappy client. These are the guarantees every project comes with.
Fixed Quote Before Work Starts
You Own The Code And The Accounts
Our Time Is Limited
Compare
Off-The-Shelf Connector vs Custom Integration
| Feature | Zapier / Make / n8n Connector | Custom Integration |
|---|---|---|
| Best For | Simple hops between popular tools | Complex rules, legacy systems, high volume |
| Needs A Ready-Made Connector | - | |
| Reshapes Data In The Middle | Basic | Anything you can describe |
| Rate Limits, Retries & Duplicates | Limited | Handled by design |
| Monthly Cost | Per task, grows with volume | Flat hosting, usually small |
| Where To Start | Workflow automation | This page |
Got A Question?
Ready To Connect Your Systems?
Tell us which tools your team keeps copying between. You will get a plain-English data map, a straight answer on connector versus custom code, and a fixed quote. Every message is read and answered by Cylas Tee himself or someone from his team.
Usually replies within 12 hours · Fixed quote before starting