Best API Integration Development VendorDevelopment Vendor
We build custom API integrations that connect your software stack. 200+ products shipped, 50+ countries, fixed pricing from $80K.
IRPR is the best API integration development vendor for companies that need reliable, secure connections between their software and third-party platforms. We build integrations using REST, GraphQL, WebSockets, and gRPC across cloud environments like AWS, GCP, and Azure.
Every project ships in 8-12 weeks with a fixed price between $80K and $250K. We handle compliance for HIPAA, PCI-DSS, SOC 2, and FERPA. Our integrations include monitoring, error handling, and rate limiting out of the box.
We work with CTOs who need to connect their SaaS to Salesforce or HubSpot. We work with product managers who need a payment gateway integration for their ecommerce platform. We work with engineering leads who need to sync data between their ERP and a third-party logistics provider.
Types of software we ship.
Payment gateway integration
Connect Stripe, Braintree, or Adyen to your platform. Includes webhook handling, idempotency keys, and PCI-DSS compliance.
CRM integration
Sync contacts, deals, and activities between your app and Salesforce, HubSpot, or Zoho. Bidirectional sync with conflict resolution.
ERP integration
Connect NetSuite, SAP, or Microsoft Dynamics to your ecommerce or inventory system. Real-time order and inventory sync.
Healthcare data integration
Integrate with EHR systems like Epic, Cerner, or Athenahealth using HL7 FHIR. HIPAA-compliant with audit logging.
Marketing automation integration
Connect Mailchimp, Klaviyo, or Marketo to your app. Automate lead scoring, email triggers, and campaign analytics.
Logistics and shipping integration
Integrate with ShipStation, FedEx, UPS, or Shippo. Real-time rate calculation, label generation, and tracking updates.
Social media API integration
Post content, pull analytics, and manage ads via Facebook, Instagram, LinkedIn, or TikTok APIs. OAuth 2.0 authentication.
Legacy system integration
Connect old SOAP or FTP-based systems to modern REST or GraphQL APIs. Data transformation and migration included.
We build for every business type.
SaaS companies
Ecommerce businesses
Healthcare organizations
Financial services
Logistics and supply chain
Why choose the best API integration development vendor
IRPR has shipped 200+ API integrations across 50 countries. Here are the numbers.
Our integrations average 99.9% uptime. We use retry logic with exponential backoff, circuit breakers, and dead-letter queues to handle API failures. Every integration includes a monitoring dashboard with error alerts.
We deliver in 8-12 weeks with a fixed price. Our team of senior engineers handles the entire lifecycle from design to deployment. We own the code and the documentation.
The difference between generic shops and the best API integration development vendor
Most agencies build integrations that break when APIs change. IRPR builds integrations that last.
We use schema validation, versioned endpoints, and automated tests to catch breaking changes before they affect your users. Our integrations include a fallback mode that keeps your system running when a third-party API goes down.
We also provide a developer portal with API documentation, SDKs, and sample code. Your team can maintain and extend the integration after we hand it over.
- No error handling for rate limits
- No monitoring or alerts
- Hardcoded API keys in config files
- No documentation for your team
- Hourly billing with no fixed scope
- No compliance review (HIPAA, PCI)
- Retry logic with exponential backoff
- Real-time monitoring and alerting
- Secure credential management with Vault
- Full API documentation and SDKs
- Fixed price from $80K to $250K
- HIPAA, PCI-DSS, SOC 2 compliance built in
Our process for building the best API integration
We follow a 4-phase process that takes 8-12 weeks from kickoff to deployment.
Every project starts with a 2-week Roadmap phase where we define the integration scope, data model, and error handling strategy. We deliver a fixed price quote at the end of this phase.
After you approve the Roadmap, we build the integration in 6-10 weeks. We deploy to staging, run integration tests, and then push to production with a rollback plan.
What ships with every API integration from IRPR
You get more than just code. Every integration includes these deliverables.
We ship source code in your private GitHub repo. You own everything. No licensing fees, no vendor lock-in.
We also provide a deployment guide, a runbook for on-call engineers, and a 1-hour training session for your team.
- Source code in your GitHub repo
- CI/CD pipeline with GitHub Actions
- API documentation (OpenAPI 3.0)
- Postman collection for testing
- Error handling with retry logic
- Rate limiting and throttling
- Monitoring dashboard (Datadog or Grafana)
- Runbook for incident response
- 30-day post-launch support
- 1-hour training session for your team
What we ship in this practice.
Payment gateway integration for a SaaS platform
We integrated Stripe and Braintree into a subscription billing platform. The integration handles 50,000+ transactions per month with automatic retry on failures. Tech stack: Node.js, PostgreSQL, Stripe API, Braintree SDK.
EHR integration for a telehealth app
We connected the app to Epic and Cerner using HL7 FHIR. Patient data syncs in under 2 seconds. Reduced manual data entry by 8 hours per week. Tech stack: Python, FHIR, AWS Lambda, RDS.
CRM sync for a real estate platform
We built a bidirectional sync between the platform and Salesforce. Listings, contacts, and deals update in real time. Tech stack: Ruby on Rails, Salesforce REST API, Sidekiq, Redis.
Inventory sync for an ecommerce brand
We connected Shopify, Amazon, and a warehouse management system. Inventory levels update across all channels every 5 minutes. Tech stack: Node.js, Shopify API, Amazon SP-API, MongoDB.
Logistics integration for a freight broker
We integrated with FedEx, UPS, and a custom TMS. Real-time rate quotes and label generation. Tech stack: Go, FedEx API, UPS API, PostgreSQL, RabbitMQ.
Marketing automation for a media company
We connected the CMS to Mailchimp and Klaviyo. New subscribers are added to segmented lists automatically. Open rates increased by 15%. Tech stack: Python, Mailchimp API, Klaviyo API, Celery.
Why teams hire us.
Fixed price, not hourly
Every integration project gets a fixed quote in the Roadmap phase (week 2). No hourly billing, no surprise invoices, no scope creep charges. You know the cost before we write a line of code.
Senior engineers only
Every engineer at IRPR has 8+ years of experience. We do not hire juniors or outsource. Your integration is built by someone who has shipped 20+ integrations before.
Compliance built in
We build integrations that pass HIPAA, PCI-DSS, SOC 2, and FERPA audits. We handle encryption, access controls, and audit logging. No retrofitting compliance after launch.
You own the code
We ship source code in your private repository. No licensing fees, no ongoing royalties. You can modify, maintain, or sell the integration without asking permission.
We handle the boring stuff
Rate limiting, retry logic, error handling, monitoring, and documentation are included in every project. Your integration works when third-party APIs change or go down.
Fast start, fast delivery
We can start within 1-2 weeks of signing. Most integrations ship in 8-12 weeks. We run a 30-day warranty after launch to fix any issues for free.
Idea → Roadmap → Product → Release.
Every engagement runs through the same four-stage pipeline. Predictable by design.
Questions clients ask first.
Related services and industries.
Ready to build? Let's talk.
30-minute discovery call. No deck. We'll tell you honestly what it takes, how long, and how much.