Custom API integrations that connect your business tools
When your software doesn’t talk to other software — and no pre-built connector or no-code platform can bridge it — Autozyne writes the custom code that connects them. Your CRM to your accounting, your store to your warehouse, your legacy system to modern tools. Built, tested, monitored, and documented, with a fixed price after a quick scoping engagement.
$250 scoping, credited toward your build · Fixed price, no surprise invoices · Delivered in 1–4 weeks
What is custom API integration?
Custom API integration is writing code to connect software systems that have no off-the-shelf integration. Autozyne connects your CRM, accounting, ecommerce, payment, and legacy systems so data flows automatically — with error handling, monitoring, and full documentation included, so you’re not dependent on one developer. Every project starts with a $250 scoping engagement, credited toward the build, that returns a fixed-price proposal. Most integrations are delivered in 1–4 weeks.
Your tools don’t talk — so your team does the talking
Modern businesses run on software, but software doesn’t naturally connect. Pre-built integrations cover the common pairs, and no-code tools like Zapier and Make handle standard patterns. The trouble starts when you need a custom CRM to sync with QuickBooks, a store to push orders to a warehouse system, or a webhook that transforms data a specific way before routing it — and there’s no connector for it.
That’s the gap Autozyne fills. We write the custom code that connects your specific systems, so data moves on its own instead of through someone re-typing it.
Custom code or no-code — which do you need?
If a no-code tool can already connect your systems, you should use it — it’s cheaper. Custom integration is for the connections no-code can’t reach.
There’s a pre-built connector, the data mapping is simple, and a few-minute delay is fine.
Autozyne builds these too — see AI Workflow Automation.
No connector exists, the authentication is complex (OAuth refresh, token rotation, legacy sessions), you need real-time sync, the data needs real transformation, the volume or rate limits break no-code, or you’re connecting a legacy/in-house system.
What every integration includes
This is a complete, maintainable build — not just “some code.” Every integration ships with what it needs to run reliably and what you need to never be locked in.
Custom code that fits your systems
Written in Node.js or Python to connect your exact source and target systems, however they authenticate.
Error handling and retries
Built-in retry logic and alerting, so a temporary API hiccup doesn’t silently drop your data.
Monitoring and alerts
You’re notified on failures by Slack, email, or SMS — issues get caught before they become problems.
Deployed and managed for you
Runs as a cloud function or scheduled job; there’s no server for you to maintain.
Full documentation
Architecture, data flow, and a deployment guide, so any developer can maintain it — you’re never locked to Autozyne.
30 days of support
Bug fixes and adjustments included after launch, with one-business-day response.
How it works
Scoping engagement ($250)
Autozyne reviews the APIs, tests the endpoints, maps the data flow, and identifies edge cases — then sends a fixed-price proposal. The $250 is credited toward your build.
Fixed-price proposal
You see exactly what it’ll cost and how long it’ll take before committing. No hourly surprises.
Build & test
Autozyne develops the integration in a staging environment and tests it against real data and edge cases.
Your review (UAT)
Your team verifies the data flows correctly before it goes live.
Deploy + 30 days of support
The integration goes to production with monitoring active, plus documentation and 30 days of post-launch support.
Why scoping first
Scoping exists so nobody commits blind. It confirms the APIs actually allow what you need, surfaces the edge cases, and turns a vague “can you connect these?” into a fixed price.
Integrations Autozyne builds
If it has an API (or can be given one), Autozyne can connect it. These are the integrations requested most often.
CRM ↔ accounting sync
Keep HubSpot, Salesforce, or Pipedrive in sync with QuickBooks or Xero — invoices, payments, and customer records.
Ecommerce ↔ ERP / 3PL
Push orders from Shopify or WooCommerce to fulfillment, sync inventory back, and return tracking numbers to the store.
Payment reconciliation
Match Stripe or PayPal transactions to your accounting, with custom rules for partial payments, refunds, and fees.
Legacy system wrapper
Put a modern REST API around an old Access, FileMaker, or on-premise system so current tools can use it.
Multi-source data aggregation
Pull data from 3–5 systems into one database or dashboard for reporting.
Custom webhook endpoints
Build a receiver that transforms and routes incoming data to one or more targets.
Authentication bridges
Handle complex OAuth refresh, token rotation, or legacy session auth that no-code platforms can’t manage.
Heavy on document or data extraction? See AI Data Processing. Connecting a specialized system to an AI agent? See Custom MCP Server Development. Not sure where to start? An AI Consulting & Automation Audit will find it for you.
Pricing
Every integration starts with a $250 scoping engagement that turns into a fixed-price proposal. Development is priced by complexity, and your $250 scoping is credited toward it. Most builds land in 1–4 weeks.
Scoping Engagement
API review, endpoint testing, data-flow mapping, edge-case analysis, and a fixed-price proposal. 1–3 business days.
DEVELOPMENT TIERS (FIXED PRICE, AFTER SCOPING)
Standard Integration
A straightforward API-to-API sync between 2 systems with standard auth and simple data mapping (e.g., CRM↔accounting, payment↔ledger).
Complex Integration
Multi-step or bidirectional sync, 3-system orchestration, or real transformation logic (e.g., ecommerce↔ERP with inventory, multi-source aggregation).
Enterprise Integration
Legacy systems, complex bidirectional sync with conflict resolution, 4+ system orchestration, or custom authentication bridges.
Need several integrations?
Get 15% off when you build 3 or more, with custom pricing for 5+. Start with one and add more within 6 months and the discount applies retroactively.
Optional Integration Monitoring Retainer
APIs change over time. An optional monitoring retainer keeps your integrations healthy after the 30-day support window — scoped to your setup, quoted to match.
Add-ons available: Load testing, priority-support SLAs, and compliance handling (GDPR/CCPA) are available and scoped to your project.
Why build it with Autozyne
Fixed price after scoping
You approve a clear price before any development starts, so there are no surprise hourly invoices.
Documented, so no lock-in
Every integration ships with architecture and deployment docs, so any developer can maintain it — you’re never stranded.
Built to fail gracefully
Retry logic, alerting, and logging are included, so a third-party API hiccup doesn’t silently break your data flow.
No server to manage
Deployed as cloud functions that scale on their own.
Honest about the limits
An integration depends on the third-party APIs; Autozyne won’t promise uptime it can’t control or claim a complex build in 48 hours.
Frequently asked questions
Not sure if you need custom integration, no-code automation, or something else? An AI Consulting & Automation Audit will map it out before you spend.
Get a Fixed Quote in 24 Hours
Tell us which systems need to talk to each other. We’ll review the APIs, map the data flow, and name a fixed price — with full documentation, so you’re never locked to one developer.