API integrations
Custom software that keeps two or more systems agreeing — records synced, events propagated, formats translated — reliably enough that nobody checks by hand anymore.
For agencies whose clients run good tools that don’t talk: the CRM says one thing, billing says another, and someone reconciles the difference every week.
- Fixed-price / build
- $2,000–$10,000
- Pilot to proof
- 2 weeks
- Defect warranty
- 90 days
Where off-the-shelf stops.
When a native connector or a Zapier zap covers the case, use it — you don’t need us for that. Custom integration work starts where those stop: two-way sync with conflict rules, volumes that hit rate limits, transformations with business logic in them, or a system with no connector at all.
The hard parts are invisible in a demo and decisive in production: auth that renews itself, retries that don’t duplicate records, rate-limit behavior, and an audit log that can answer “why did this record change?” months later. That’s the actual deliverable — the data moving is the easy part.
Integrations are also how AI work becomes real: an agent is only as useful as the systems it can safely touch.
If the job is a multi-step business process rather than two systems agreeing, that’s a workflow build. Read about workflow automation.
ILLUSTRATIVE EXAMPLE — NOT A CLIENT ENGAGEMENT
| Field | HubSpotCRM | StripePayments | |
|---|---|---|---|
| Customer | system of record | follows | |
| Subscription | follows | system of record | |
| Invoice | follows | system of record |
On every sync
- auth renews itself
- retries don’t duplicate
- rate limits respected
- every resolution logged
Where custom integration work starts.
The connector doesn’t exist
A vertical SaaS, an internal database, a legacy system with an export button and nothing else. We build the connection — or put a small API in front of the legacy system so everything else can integrate with it.
The connector is too shallow
It syncs contacts but not line items; it fires on create but not on change. Shallow sync is how the CRM and billing drift apart — the custom build covers the fields and events the business actually runs on.
Two-way sync with real stakes
When both systems accept edits, conflicts are a certainty, not a risk. Conflict rules — which system wins, per field — get decided in the spec, and an audit log records every resolution.
Volume
Ten records an hour forgives everything; ten thousand needs batching, backoff, and idempotency. Per-task pricing and silent retries get expensive and dangerous at volume — this is where custom code earns it.
Example integration builds.
Illustrative examples — the shape of work this line covers, not client case studies. Builds are quoted fixed-price from the published range ($2,000–$10,000 / build) before work starts.
HubSpot–Stripe two-way sync
Customers, subscriptions, and invoices agreeing in both directions, with per-field conflict rules and an audit log of every change.
Fulfillment pipeline
Orders flowing from the store to the warehouse and tracking flowing back — with retries, dedupe, and an alert when a shipment stalls, instead of a customer finding out first.
Legacy system API
A small, documented API in front of an aging database, so the client’s modern tools — and their AI builds — can finally reach their own data safely.
How we build integrations.
The spec for an integration is a data contract: which fields map where, which system wins each conflict, what happens on failure, what gets logged. It’s signed before work starts — QA and the 90-day warranty both run against it.
Access follows least privilege: scoped API credentials in accounts the client controls, never blanket admin, revoked at handover. Monitoring and alerting ship with the build; keeping watch after launch is the care plan’s job.
The mechanics are the same on every line we ship:
- 01Pilot first — Every relationship starts with one real project: $1,000 flat, two weeks, fully credited toward month one of any retainer.
- 02Scoped in writing — Scope, milestones, and — on fixed-price work — the price, signed before work starts. The spec is the contract QA runs against.
- 03One point of contact — Javid scopes every project and answers inside four business hours; every active engagement gets a written status each Friday.
- 04Founder QA — Every deliverable is checked against the signed spec before you see it — behavior, edge cases, and security.
- 05White-label handover — Repos, credentials, and docs transfer to accounts you or your client control. Nothing we ship carries our name.
- 0690-day warranty — If a delivered build doesn’t match its signed spec, we fix it free for 90 days after handover.
Technologies
Defaults, not dogma — where your client already has a stack, we build in it.
- TypeScriptIntegration services
- n8nLightweight orchestration
- SupabaseSync state & logs
- MCPAI tool connections
Questions about API integrations.
Why not just use Zapier?
Often you should — and we’ll say so in the fit call rather than sell against it. Custom work starts where off-the-shelf stops: two-way sync, conflict rules, volume, business logic, or a system with no connector. The scope names which side of that line your project is on.
What access do you need?
The minimum the data contract requires: scoped API credentials, granted per project, logged, and revoked at handover. Everything runs in accounts you or your client control — the same rules as the security page.
What happens when an API we depend on changes?
With a care plan, monitoring catches the deprecation before it breaks; without one, a breaking change becomes a small scoped fix when it surfaces. Either way, the audit log makes the blast radius knowable instead of guessable.
Can an integration feed an AI build later?
That’s the right order: clean, synced data first, then agents and automations on top of it. Integration work is never wasted on an AI roadmap.
Related service lines.
Workflow automation
Multi-step business processes — intake, enrichment, reporting, back-office ops — built to run without a person pushing them.
Web applications
Client portals, dashboards, booking systems, and internal tools — Next.js/TypeScript by default, deployed to accounts your client owns.
AI agents
Agents that complete multi-step work — document processing, triage, research — with human gates where it matters.
Start with one real build.
Scope your first project as the pilot — $1,000 flat, two weeks, fully credited toward month one of any retainer. If the work isn’t retainer-quality, you keep the deliverable and walk.