Services / Software Development / API Integration Services
Software Development
Software Development

API Integration Services

Professional API integration services — connecting payment gateways, CRMs, ERPs, and third-party platforms to your software with resilient, documented, production-grade integrations.

1–4 wks
Typical Delivery
200+
APIs Integrated
99.9%
Uptime SLA Target
Overview

Modern businesses run on interconnected systems, and every broken API integration is a revenue leak or a customer experience failure. Our API integration services connect your applications to third-party platforms, internal microservices, and data sources with the reliability, observability, and documentation your engineering team needs to operate them confidently in production.

We have built and maintained integrations with hundreds of APIs across payments (Stripe, Braintree, PayPal, Adyen), CRM (Salesforce, HubSpot, Pipedrive), ERP (SAP, NetSuite, Microsoft Dynamics), marketing (Mailchimp, Klaviyo, Twilio, SendGrid), logistics (FedEx, UPS, DHL, Shipstation), accounting (Xero, QuickBooks), and custom REST, GraphQL, SOAP, and gRPC APIs. We handle OAuth 2.0 and OpenID Connect flows, webhook management, event-driven architectures, and synchronisation queues for high-volume bidirectional data sync.

Every API integration we deliver is observable, resilient, and documented to OpenAPI 3.0 specification. Rate limiting, exponential backoff, idempotency keys, circuit breakers, and dead-letter queues are standard — not optional extras. We configure error alerting and real-time dashboards so your team sees integration health at a glance and can diagnose failures without digging through logs.

{ }
</>
( )
~/project/src/index.ts
1import { App } from './core'
2import { db } from './database'
3
4const bootstrap = async () => {
5  await db.connect()
6  const app = new App()
7  app.listen(3000)
8}
9
10// API routes
11export const routes = [
12  { path: '/api/v1', handler },
13  { path: '/auth', handler }
14]
15bootstrap() 
1import { App } from './core'
2import { db } from './database'
3
4const bootstrap = async () => {
5  await db.connect()
6  const app = new App()
7  app.listen(3000)
8}
Technologies We Use
REST APIs GraphQL OAuth 2.0 Webhooks Stripe Salesforce HubSpot Twilio SendGrid Node.js
What We Deliver
  • API architecture design with data flow diagrams and transformation mapping
  • OAuth 2.0, API key, JWT, and webhook signature authentication
  • Webhook ingestion with validation, deduplication, and retry queues
  • Circuit breakers, exponential backoff, and idempotency key handling
  • Full OpenAPI 3.0 documentation with request/response examples
  • Real-time monitoring dashboard with error rate alerting and SLA tracking

Why RapideKops?

  • Every integration is documented so your team operates it independently — no dependency on us
  • Idempotency and deduplication handled correctly — no duplicate charges or records
  • Webhook signature validation and replay protection included by default
  • Rate limit management with intelligent backoff — never burn your API quota
  • Security review: third-party API data audited before it reaches your database
  • Dead-letter queues for failed events — nothing is silently dropped in production
How We Work

Our Delivery Process

01

API Audit

We review target API documentation, rate limits, authentication model, known quirks, and SLA before designing your integration architecture.

02

Integration Design

We map data flows, define transformation logic, and design the error handling and retry strategy — reviewed and signed off before coding begins.

03

Build & Test

Development against sandbox environments with integration tests covering happy paths, timeouts, malformed responses, and rate limit scenarios.

04

Deploy & Monitor

Production deployment with monitoring dashboards, error alerting, and a runbook so your team can diagnose and recover from failures independently.

Common Questions

Frequently Asked Questions

What API protocols and formats do you work with?
We work with REST (JSON, XML), GraphQL, gRPC, SOAP, EDI, and WebSocket APIs. We handle all common authentication methods: API keys, OAuth 2.0, OpenID Connect, HMAC signatures, and certificate-based mutual TLS.
What happens when a third-party API goes down and our data stops flowing?
We build integrations with circuit breakers that detect downstream failures and stop sending requests during outages, exponential backoff with jitter for retries, and dead-letter queues that preserve failed events for replay when the API recovers. You receive an alert when an integration fails — not a silent data gap.
How do you handle webhooks from platforms like Stripe or Shopify reliably?
We validate webhook signatures to prevent spoofed events, implement idempotent event handlers so replayed webhooks do not cause duplicate processing, and queue events asynchronously so webhook handlers respond in under 200ms — preventing the platform from timing out and retrying.
Can you build a bidirectional sync between our CRM and ERP?
Yes — bidirectional sync is one of our specialties. We design a conflict resolution strategy (source of truth per field), implement change detection via webhooks and polling, handle bulk historical backfills, and build a reconciliation report to surface sync discrepancies.
How long does a typical API integration take to build?
Simple integrations (single API, one data flow, no complex transformation) take 3–7 business days. Complex integrations with bidirectional sync, multiple entities, OAuth flows, and webhook handling typically take 2–4 weeks. We scope accurately upfront so you are never surprised by timeline slippage.

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