API Integration Services That Connect Your Stack Without Breaking It

API integration services connect separate software systems so they can share data and trigger actions automatically. The work spans integration strategy, custom API and connector development, security, testing, and ongoing monitoring. AddWeb delivers the full lifecycle, with resilience and ISO 27001-aligned security engineered in from the start.

We work with REST, GraphQL, SOAP, and webhook-based APIs across payment gateways, CRM and ERP systems, HRMS, shipping and 3PL carriers, messaging providers, marketplaces, and custom internal services. We also design and build new APIs from scratch when no suitable one exists.

We engineer failure handling into every connection idempotency keys, retries with backoff, circuit breakers, and dead-letter queues and add distributed tracing and alerting so any breakage surfaces in minutes. Our Datadog-certified observability practice means you find problems before your customers do.

Yes. We use OAuth2, scoped and rotated credentials, encrypted transport, and audit logging, mapped to the ISO/IEC 27001 controls we operate under as a certified company. Security is part of the architecture, not an afterthought.

Yes. We integrate major gateways including Stripe, PayPal, and others across web, mobile, and POS, with idempotent transaction handling, reconciliation, and PCI-aware data flows. We can also build a custom payment API tailored to your business model.

Both. We connect existing third-party and internal APIs, and we design, build, version, document, and test new custom APIs end to end when your product needs functionality that no off-the-shelf API provides.

A single, well-documented third-party integration can take days; a multi-system integration with custom logic, security review, and testing can take several weeks. We scope timeline and effort precisely in Discovery against your actual systems before any commitment.

A unified-API platform gives you a fixed catalog of connectors on a subscription. We build custom and non-standard integrations, own the failure handling and security model end to end, and can operate the integration as a managed service without catalog limits or ongoing lock-in.

Yes. Our API Managed Services cover the full lifecycle performance tuning, security monitoring, periodic audits, and enhancements so your engineers stay focused on product instead of firefighting connectors.

It’s productizing your data and functionality as standards-based endpoints (HTTP/HTTPS, JSON REST, SOAP) that partners or internal teams can consume. We handle configuration, data mapping, security testing, and managed support so the service stays reliable.

Yes. We audit existing APIs for performance, security, and reliability gaps, then refactor, document, version, and add the monitoring and testing they were missing often the fastest path to a stable integration layer.

Cost depends on the number of systems, the complexity of the data flows, and whether custom APIs are required. We don’t publish fixed tiers because honest pricing follows scope we scope it in Discovery against your real requirements and give you a clear estimate before you commit.

No we design against that. We build adapter layers that isolate your systems from any single provider, so swapping a payment, CRM, or shipping vendor later means changing one adapter, not rebuilding your integration.

Book a strategy call with our team. We’ll review your current systems and the connections you need, identify the highest-risk failure points, and outline an integration approach and rough scope no obligation to proceed.