Top REST API Development CompanyREST API
We build secure, scalable RESTful APIs for your product. Ship in 12 weeks with a fixed price.
IRPR is a top REST API development company. We design and build RESTful APIs using Node.js, Python (FastAPI), Go, and .NET Core. Every API follows OpenAPI 3.0 specifications and uses JWT authentication, rate limiting, and comprehensive error handling.
We ship production-ready APIs in 8-12 weeks. Fixed pricing starts at $80K for a standard API and goes up to $250K for complex integrations. All APIs are HIPAA, PCI-DSS, and SOC 2 compliant depending on your industry.
Our clients include SaaS founders needing a public API, fintech startups requiring PCI-compliant payment APIs, healthcare platforms needing FHIR-based REST endpoints, and ecommerce brands integrating with Shopify and Stripe. We also work with enterprise teams modernizing legacy SOAP APIs to REST.
Types of software we ship.
Public REST API for SaaS
A customer-facing API that lets third-party developers integrate with your platform. Includes documentation, SDKs, and usage analytics.
Internal REST API for Microservices
Backend API for communication between microservices. Uses gRPC or REST with message queues like RabbitMQ or Kafka.
REST API for Mobile Backend
API powering iOS and Android apps. Optimized for low latency, offline sync, and push notifications via Firebase Cloud Messaging.
Payment API (PCI-DSS)
PCI-compliant REST API for processing payments. Integrates with Stripe, Braintree, or Adyen. Tokenizes card data.
Healthcare API (FHIR/REST)
HIPAA-compliant REST API using FHIR standards. Connects to EHR systems like Epic and Cerner.
Ecommerce API
REST API for product catalog, cart, checkout, and order management. Integrates with Shopify, Magento, and custom backends.
Real Estate API (MLS)
REST API for property listings, MLS data, and CRM integration. Handles large data sets with caching and pagination.
Data Analytics API
REST API for ingesting, querying, and exporting analytics data. Uses PostgreSQL, ClickHouse, and Redis for fast aggregations.
We build for every business type.
SaaS and Platforms
Fintech and Payments
Healthcare and Life Sciences
Ecommerce and Retail
Enterprise and Internal Tools
Why Choose IRPR for REST API Development?
We have shipped over 200 APIs across 50 countries with a 98% on-time delivery rate.
Every REST API we build includes automated testing, CI/CD pipelines, and comprehensive documentation. Our APIs handle millions of requests per day with 99.9% uptime guaranteed.
We use OpenAPI 3.0 for specification-first development. This means your API contract is defined before any code is written, ensuring consistency and enabling auto-generated client SDKs.
How We Differ from Generic API Shops
Most development agencies treat API design as an afterthought. We treat it as the foundation.
A poorly designed REST API leads to versioning nightmares, security holes, and slow performance. We avoid these by following strict design patterns, using proper HTTP methods, and implementing robust authentication from day one.
Our team includes senior engineers who have built APIs for companies like Stripe, Twilio, and Slack. We apply the same principles to your project, regardless of size.
- No API design standards
- Inconsistent error handling
- No rate limiting or throttling
- Poor documentation
- No automated tests for endpoints
- Security reviews as an afterthought
- OpenAPI 3.0 specification-first
- Consistent error responses (RFC 7807)
- Rate limiting with Redis and token bucket
- Interactive docs with Swagger UI
- 100% endpoint test coverage
- OWASP security review before launch
Our REST API Development Process
We follow a structured approach to deliver production-ready REST APIs.
Every project starts with a 2-week Roadmap phase where we define the API contract, data model, and security requirements. You get a fixed price quote before any development begins.
During the Build phase, we work in 2-week sprints with continuous delivery. You can see working endpoints on staging after each sprint. We also provide Postman collections and integration guides.
What You Get With Every REST API Project
Every API ships with these deliverables — no extra cost, no negotiation.
Every deliverable is listed in your contract.
- OpenAPI 3.0 specification file (YAML/JSON)
- Source code in your private GitHub repo
- CI/CD pipeline with GitHub Actions or GitLab CI
- Automated test suite with 90%+ coverage
- Postman collection with example requests
- Swagger UI or Redoc documentation page
- Rate limiting with Redis (configurable)
- JWT or OAuth 2.0 authentication
- Sentry error tracking and logging
- Deployment scripts for AWS/GCP/Azure
What we ship in this practice.
Payment API for a Fintech Startup
Built a PCI-DSS compliant REST API for a neobank that processes $50M in monthly transactions. Used Node.js, Express, Stripe Connect, and PostgreSQL. Reduced payment failure rate by 40%.
Healthcare API for Telemedicine Platform
Developed a HIPAA-compliant FHIR REST API connecting 500+ clinics. Used Python FastAPI, PostgreSQL, and Twilio for video. Cut patient onboarding time from 15 minutes to 3.
Ecommerce API for Multi-Store Retailer
Created a unified REST API for inventory, orders, and shipping across 20+ Shopify stores. Used Ruby on Rails, Redis, and RabbitMQ. Reduced stockouts by 60%.
SaaS Public API for Analytics Platform
Designed a public REST API used by 200+ third-party developers. Used Go, PostgreSQL, and GraphQL for complex queries. API handles 10M requests per day with 99.9% uptime.
Real Estate API for MLS Integration
Built a REST API that aggregates MLS data from 50+ sources. Used Node.js, Elasticsearch, and Redis caching. Query performance improved 10x compared to the legacy system.
Internal API for Logistics Company
Replaced a legacy SOAP system with a REST API for shipment tracking. Used .NET Core, SQL Server, and Azure Service Bus. Reduced integration time for new carriers from 4 weeks to 2 days.
Why teams hire us.
Fixed Price from Day One
After the 2-week Roadmap, we give you a fixed quote for the entire API. No hourly billing, no surprise invoices. 98% of our projects finish on budget.
Senior Engineers Only
All our engineers have 10+ years of experience and have worked at companies like Google, Amazon, and Stripe. We never outsource or use junior developers.
OpenAPI Specification-First
We define your API contract in OpenAPI 3.0 before writing code. This ensures consistency, enables auto-generated SDKs, and makes onboarding new developers fast.
Security Built In
Every API includes JWT/OAuth authentication, rate limiting, input validation, and OWASP security checks. We also support HIPAA, PCI-DSS, and SOC 2 compliance.
Production-Ready Delivery
Your API ships with CI/CD, automated tests, monitoring (Sentry, Datadog), and deployment scripts. You can go live immediately after handover.
Post-Launch Support
We provide 30 days of free support after launch. We also offer ongoing maintenance plans starting at $2K/month for updates, bug fixes, and scaling.
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.