Custom API & Systems Integration
Your systems, finally talking.
A booking on your website becomes a customer record, an invoice and a follow-up — without anyone re-typing anything. We build the plumbing between the tools you already pay for, and sometimes we replace the ones you shouldn’t be paying for at all.
For businesses running three or more disconnected tools and paying for it in staff time and errors: e-commerce, multi-location service businesses, clinics, tour operators, anyone whose "system" is a person moving data between apps.
In plain English
What you get.
Typed once, everywhere it’s needed
A booking, an order or a customer detail entered once shows up in every system that needs it, in seconds.
No more "did that get into QuickBooks?"
The hand-offs that used to depend on somebody remembering just happen, every time, whether anyone is watching or not.
Breaks you hear about from us
Every connection monitored and alerting. A failed sync is our problem before it becomes your problem.
Sometimes, fewer subscriptions
Where a tool is only doing one small job badly, building the replacement is often cheaper than renting it forever. We did exactly that to our own rental company.
The short version on money: builds start at $5,000, plus a Care Plan from $299/mo to keep it running. Fixed-quoted before we start — full numbers further down, or on the pricing page.
Go-live in 3–8 weeks
How it works — from copy-paste to one source of truth.
Week 1
Discovery.
We map every system, every hand-off, and every place data is re-keyed, and rule on the source of truth for each field.
Weeks 2–5
Build.
Middleware, sync logic, transforms, verification, error handling and retries — with idempotency so nothing double-posts.
Weeks 5–7
Testing.
End-to-end runs across real scenarios, failure-mode testing, and data-integrity checks on real data.
Weeks 7–8
Cutover.
Architecture diagram, data-flow map and runbook handed over, then a supervised cutover. The Care Plan monitors it from day one.
Client effort: Your effort: medium — you provide access, field-mapping decisions, and testing sign-off on real data. Longer timelines for many systems.
What's included
What it does — and what's included.
| Phase / item | What you get |
|---|---|
| Discovery | Map every system, every hand-off, and every place data is re-keyed; define the source of truth for each field. |
| Build | Integration middleware, data-sync logic, transforms, error handling and retries — documented so you are never locked in. |
| Integrations | Two or more of: e-commerce (Shopify/Woo), CRM (HubSpot/others), accounting (QuickBooks/Xero), scheduling, email/SMS, custom apps via API. |
| Verification | Checks on the data in transit, so a bad or duplicate record is caught before it lands anywhere that matters. |
| Reliability | Monitoring, alerting on failures, idempotency and de-dup so nothing double-posts. |
| Testing | End-to-end runs across real scenarios, failure-mode testing, data-integrity checks. |
| Docs & go-live | Architecture diagram, data-flow map, runbook, supervised cutover. |
Not included: the underlying software subscriptions; re-platforming a system you've outgrown (we integrate — replacing a core product is a separate decision); one-off data migration unless scoped. Common add-ons: AI enrichment on the data in transit, dashboards, additional systems later, in-house replacements for small subscription tools, workflow logic on top (pairs with Workflow Automation).
Under the hood
How we actually run a business’s systems.
The word "integration" hides a lot of different work. These are the categories behind it — what gets built, and what each one does for you.
- Webhooks between your systems. Direct hand-offs wired system to system: something happens in one place and the others know about it in seconds. Nobody sits watching a queue, and nothing waits for the nightly batch that somebody forgot to run.
- Scripts for the jobs nobody should do by hand. The nightly reconcile, the bulk price update, the export-reformat-reimport that used to be somebody’s Friday afternoon. Written once, run on schedule, logged every time so you can see it happened.
- Verification agents that check data before it lands. An AI reviewer sitting between your systems: does this record make sense, does it match what we already hold, is this the kind of oddity a person should look at first? Bad data caught before it is in your books, not discovered in it three months later.
- OAuth-secured connections. Every connection authorised properly in your name and revocable by you. No shared passwords, no logins living in a spreadsheet, no mystery account nobody can switch off after someone leaves.
- In-house replacements for software you’re renting. A proper database behind your forms instead of a monthly fee. A small internal tool that does the one job three products were each doing badly. We did this to ourselves first: RevyCar, our own rental company, replaced about $200 USD a month of subscriptions with the system we built — same shape of work we would do for you.
- Your own business data, read and put to work. Historic quotes, customer records, the lists living across fifteen spreadsheets: parsed, structured, de-duplicated, and turned into something you can search, price from, or actually reach out to.
- Marketing research on your own numbers. What your existing records already say about who buys what, when, and at what price — pulled out of the data you are sitting on rather than bought from somebody’s survey panel.
Named as categories on purpose. Which of these your business actually needs, in what order, and what it would save is the deliverable of the paid AI Opportunity Audit — or the free 20-minute assessment call. We publish the shapes, not the recipes.
Works with what you've got
It connects the tools you already pay for.
We build on top of your existing stack — no rip-and-replace.
- E-commerce: Shopify, WooCommerce.
- CRM: HubSpot and others.
- Accounting: QuickBooks Online, Xero.
- Scheduling, email/SMS, and custom apps via API.
- Your own data: spreadsheets, exports, historic quotes and customer lists, parsed into something usable.
Prerequisites: admin access and API availability on each system (some tools gate APIs to higher plans — we confirm in discovery), and a decision-maker to rule on the source of truth for shared data.
The honest part
What this isn’t — and when it’s not worth it.
Every build has edges. Here are ours — better read now than discovered in week three.
- We integrate; we don’t re-platform. If you have outgrown a core system we will say so, but replacing it is a separate decision — never a condition of working with us.
- We don’t sell you the subscriptions. You own your accounts. Some tools gate their API behind a higher plan; we confirm that in discovery, before you commit, not after.
- Some tools simply won’t play. A product with no API and no usable export is a wall. We would rather tell you on the free call than quote around it.
- Replacing software has a limit. Rebuilding a real product in-house is rarely worth it. We do it where a subscription is doing one small job badly — and we say no where it is genuinely earning its fee.
- When it’s not worth it yet: two tools and one person moving a handful of records a week does not need a hub. This pays when the re-typing is daily and the mistakes cost you money.
What it looks like in practice
An example engagement (illustrative).
A fictional-but-realistic engagement to show the shape of a build — not a case study, and not a guarantee. Real proof arrives with our founding clients.
Alpine Bloom florist + online shop, Vernon Illustrative
Online orders (Shopify), walk-ins (Square), deliveries (a spreadsheet) and books (QuickBooks) never agree. RevyTech AI builds a hub: every order, wherever it starts, creates one customer record, one invoice, and a delivery task, all reconciled nightly. Setup $13,500, Growth care. Month-end stops being a forensic investigation.
Transparent pricing
Starting at $5,000 to build. From $299/mo to keep it sharp.
Moves up with: number of systems; one-way vs. bidirectional sync; data-transform complexity; API quality of each tool (a poorly documented or rate-limited API adds hours); volume and real-time requirements. Two clean systems, one-way, sits near $5,000; a multi-system bidirectional hub approaches (and past) $25,000.
- Custom API & Systems Integration — build
- Starting at $5,000. Typical range $5,000–$25,000, fixed-quoted to your setup.
- Care Plan — keep it running
- Requires a Care Plan, from $299/mo (Core); Growth for 3+ integrated systems.
- Payment terms
- 50% to start, 50% at go-live under $10,000; 50/25/25 at $10,000 and up.
- Usage
- AI usage (and SMS where the build sends messages) passes through with a monthly allowance included, itemized on every invoice — never marked up in secret.
Questions
Custom API & Systems Integration FAQ.
Which systems can you connect?
Two or more of: e-commerce (Shopify/Woo), CRM (HubSpot and others), accounting (QuickBooks/Xero), scheduling, email/SMS, and custom apps via API. If it has an API or a supported connector, we can almost certainly wire it in — API availability is confirmed in discovery before you commit.
Can you replace software we're paying for?
Sometimes — and it's one of the more satisfying things we do. Where a subscription is doing one small job badly (a form that should be a database, a tool only one person uses), building the replacement is often cheaper than renting it forever. Our own rental company, RevyCar, replaced about $200 USD a month of subscriptions that way. Where a product is genuinely doing heavy lifting, we'll tell you to keep paying for it.
What happens when something fails mid-sync?
The build includes monitoring, alerting on failures, retries, and idempotency/de-dup logic so nothing double-posts. Failure modes are tested before cutover, and the Care Plan means we usually fix an integration break before you feel it.
Do we have to replace the software we use?
No — that's the point. We integrate the tools you already pay for; we don't re-platform. If a system is genuinely at end-of-life, we'll tell you, but replacing it is a separate decision, not a requirement.
What does it cost?
Builds start at $5,000 and are fixed-quoted before we begin (typical range $5,000–$25,000 by the number of systems and sync complexity). Every AI build includes a Care Plan from $299/mo — Growth for 3+ integrated systems. Full detail on the pricing page.
Pairs well with
Most builds don't stay solo.
Every system you add sits under the same single Care Plan — the tier grows only when your setup does.
Is it worth it for your business? Let's find out — free.
Book a free 20-minute AI assessment. We'll tell you what this build would do for you, what it'd cost — and if it's not worth it yet, we'll say so.
Prefer to talk now? Call (236) 837-3550 — our own AI receptionist picks up, 24/7. Yes, the same one we sell: consider the call a live demo. It books, answers, or takes a message — and a real BC-based human follows up within one business day, usually faster.