Your CRM, accounting software, email platform, and store each hold a piece of the truth — and your team retypes data between them every day. Our API integration service connects your business tools so information flows automatically: new orders create invoices, new leads trigger follow-ups, and stock levels stay in sync everywhere.
Integrations we build most often
- CRM integrations: HubSpot, Zoho, Salesforce, Pipedrive — contacts, deals, and activities synced both ways with your website and store.
- Accounting and ERP: orders, invoices, and inventory flowing between WooCommerce or your custom app and your accounting system.
- Marketing automation: email, SMS, and ad audiences triggered by real business events instead of manual list uploads.
- Payment and billing: Stripe, PayPal, and regional gateways connected to checkout, invoicing, and reconciliation.
- Custom systems: legacy software and proprietary tools connected through middleware we build and document.
How an integration project works
We start with a systems map: what you use, what data lives where, and where the manual work hurts most. Then we design the data flow — what syncs, how often, what happens when something fails — and build it with proper error handling, logging, and retry logic. Every integration is tested against real data on staging before it touches production, and you get documentation your team can actually follow.
Frequently asked questions
How much do API integration services cost for a small business?
A two-system integration — for example, syncing WooCommerce orders into your CRM — typically costs $1,000–$3,000. Workflows spanning three or more systems with custom business logic usually run $3,000–$10,000. If your tools are standard, an n8n-based automation often costs less.
How long does it take?
Simple integrations go live in 1–3 weeks. Multi-system projects take 4–8 weeks including testing with your real data. The systems-mapping workshop at the start is what keeps projects on schedule.
What if our software has no API?
Older or niche tools often lack APIs. In those cases we use scheduled file imports, email parsing, or controlled browser automation through n8n. We will assess your specific tool and recommend the most reliable path — and tell you honestly if an integration is not worth building.
Who maintains the integration?
We do, if you want us to. Integrations include monitoring and error alerts, and our support plans cover fixes when a third-party API changes — which happens more often than vendors admit.
Related: custom API development, n8n workflow automation, and our WooCommerce development services. Tell us which systems you need connected.
Exactly what’s included in every integration
An integration that breaks at 2am is worse than no integration. Everything we ship is built for production:
- API research & mapping: we read the docs (and the undocumented parts) and map every endpoint, field, and edge case before writing code.
- Authentication handled: OAuth 2.0 flows, API keys, webhooks verification, token refresh — the fiddly parts done right.
- Data transformation: field mapping, format conversion, and validation so both systems speak the same language.
- Error handling & retries: rate-limit backoff, failed-request queues, and alerts — transient failures recover automatically.
- Webhooks both ways: real-time sync where it matters, scheduled sync where it doesn’t.
- Monitoring: integration health dashboards and alerts when something drifts.
- Documentation: what was built, how data flows, and how to extend it — written for your team, not just ours.
- 30-day post-launch support: fixes free for the first month.
Systems we connect most
- Payments: Stripe, PayPal, Razorpay — checkout flows, subscriptions, webhooks for payment events.
- CRMs: HubSpot, Salesforce, Zoho, Pipedrive — plus the custom CRMs we build.
- Ecommerce: WooCommerce, Shopify — inventory, orders, and fulfillment sync.
- Communication: WhatsApp Business API, Twilio, SendGrid — messaging wired into your workflows.
- Accounting: QuickBooks, Xero — invoices and payments reconciled automatically.
- Legacy & internal systems: the old database with no API — we build the bridge (file drops, screen-level connectors, or a new API layer on top).
API integration pricing
Fixed quotes after a free scoping call. As a guide: a straightforward two-system integration (e.g., website forms → CRM) typically runs $800–$2,500. Multi-system integrations with complex data mapping run $2,500–$8,000. Ongoing maintenance plans cover monitoring and fixes when third-party APIs change — because they will.
Why MTD for API integrations
- Integrations are our core craft: 9+ years and 300+ projects of connecting systems — this isn’t a side service.
- We read APIs for a living: poorly documented, version-shifting, rate-limited APIs are our normal Tuesday.
- Built for failure: every integration assumes the other side will break, and behaves gracefully when it does.
- Full-stack context: when an integration needs a custom endpoint on your side too, our custom API development team builds it — one vendor, no finger-pointing.
More questions, answered
How much does a custom API integration cost?
A straightforward two-system integration typically costs $800–$2,500 fixed. Multi-system integrations with complex mapping run $2,500–$8,000. We quote fixed prices after a free scoping call.
How long does an integration take?
Simple integrations ship in 1–2 weeks. Complex multi-system work takes 3–6 weeks including testing. The biggest variable is usually the third party’s API quality, not our build speed.
What if the API has poor documentation?
Common, and fine. We probe endpoints directly, read SDK source when available, and build against observed behavior — then document what we learned for you.
Do you handle OAuth and authentication?
Yes — OAuth 2.0 flows, token refresh, webhook signature verification, API key rotation. Authentication is where most DIY integrations fail; we treat it as a first-class deliverable.
What happens when the third-party API changes?
Our monitoring catches breakage fast, and maintenance plans cover adapting to API changes. We also version-pin where possible and build abstraction layers so a vendor change doesn’t mean a rebuild.
Can you integrate a legacy system with no API?
Usually yes. Options include scheduled file-based sync, database-level connectors, or building a lightweight API layer on top of the legacy system. We’ll tell you honestly which approach fits during scoping.
Stop copy-pasting between systems. Get a free scoping call — we’ll map your integration and quote it fixed before you commit.