Your Experienced REST API Development PartnerREST API
We build production-grade REST APIs that connect your systems. Fixed price, senior engineers, 8-12 week delivery.
IRPR is an experienced REST API development partner. We design and build custom REST APIs using Node.js, Python (FastAPI), Go, and Java Spring Boot. Every API is documented with OpenAPI 3.0 and tested with Postman and Jest.
We ship production-ready REST APIs in 8-12 weeks. Pricing starts at $80K for a standard API and ranges up to $250K for complex integrations with multiple endpoints, authentication, and rate limiting. All projects include CI/CD, monitoring, and full code ownership.
Companies hire us when they need a reliable REST API partner: CTOs at SaaS startups who need to expose core functionality to third-party developers, engineering leads at fintech companies integrating payment gateways, and product managers at healthcare firms building HIPAA-compliant data exchange layers.
Types of software we ship.
REST API for Mobile Backend
A backend API that serves data to iOS and Android apps. Uses PostgreSQL, Redis caching, and JWT authentication.
Third-Party REST API
A public API for external developers. Includes API keys, rate limiting, usage analytics, and versioning with OpenAPI docs.
Internal Microservice REST API
A lightweight API for communication between internal services. Built with Docker, Kubernetes, and gRPC fallback.
Data Aggregation REST API
An API that combines data from multiple sources (CRM, ERP, warehouse). Uses ETL pipelines and GraphQL for flexible queries.
Payment REST API
A PCI-DSS compliant API for processing payments. Integrates with Stripe, Braintree, or Adyen. Handles refunds, subscriptions, and webhooks.
REST API for IoT Devices
An API that ingests sensor data from thousands of devices. Uses MQTT, WebSockets, and TimescaleDB for time-series storage.
CMS REST API
A headless CMS API that serves content to multiple frontends (web, mobile, smart TV). Built on Strapi or Contentful with webhook triggers.
REST API for Machine Learning
An API that exposes ML model predictions via endpoints. Uses FastAPI, TensorFlow Serving, and Kubernetes for auto-scaling.
We build for every business type.
SaaS and platform companies
Healthcare and life sciences
Fintech and financial services
Ecommerce and retail
Logistics and supply chain
Why You Need an Experienced REST API Development Partner
A poorly designed REST API costs you time, money, and developer trust.
Building a REST API that scales requires more than writing endpoints. You need proper authentication (OAuth 2.0, JWT), rate limiting (1000 req/min), versioning (v1, v2), and comprehensive error handling (HTTP 400, 401, 404, 500). IRPR has shipped over 200 production APIs across 50 countries.
Our senior engineers follow REST best practices: HATEOAS, idempotent endpoints, pagination (cursor-based), and caching (Redis, CDN). We document every API with OpenAPI 3.0 and provide a Postman collection for testing. You get a fully functional API that your developers can integrate in hours, not weeks.
The Difference Between a Dev Shop and an Experienced REST API Partner
Most agencies build APIs that break under load. IRPR builds APIs that handle millions of requests.
We see the same problems again and again: no rate limiting, no proper error codes, no versioning, and no monitoring. These shortcuts work for a demo but fail in production. IRPR treats your API as a product, not a one-time task.
Every API we build includes Prometheus metrics, Sentry error tracking, and Grafana dashboards. We set up automated load testing with k6 and enforce a 99.9% uptime SLA. Our APIs are used by companies processing over 1 million requests per day.
- No API versioning strategy
- No rate limiting or throttling
- Minimal error handling (only 200 and 500)
- No monitoring or alerting
- No automated load testing
- No OpenAPI documentation
- Semantic versioning (v1, v2) with deprecation headers
- Rate limiting with Redis and per-user quotas
- Structured error codes (4xx, 5xx) with human-readable messages
- Prometheus + Grafana dashboards and Sentry alerts
- k6 load testing before every release
- OpenAPI 3.0 docs auto-generated from code
Our REST API Development Process
We follow a 4-phase process that delivers a production-ready API in 8-12 weeks.
Phase 1 is the Roadmap. We define endpoints, data models, authentication, and rate limits. You get a fixed price quote at the end of week 2. No surprises.
Phase 2 is the Build. Our senior engineers write the code, write unit tests, and set up CI/CD. You see progress every week via a live demo environment.
What Ships with Every REST API
Every project includes these deliverables by default. No hidden fees, no extra charges.
You get everything you need to maintain and scale your API. Source code, documentation, monitoring, and CI/CD pipeline are included in the fixed price.
- Source code in your GitHub/GitLab repo
- CI/CD pipeline with GitHub Actions or GitLab CI
- OpenAPI 3.0 documentation
- Postman collection with example requests
- Unit tests with 90%+ code coverage
- Integration tests for all endpoints
- Docker Compose setup for local development
- Prometheus metrics and Grafana dashboard
- Sentry error tracking integration
- Deployment guide and runbook
What we ship in this practice.
Payment Processing API for Fintech Startup
Built a PCI-DSS compliant REST API that processes 50,000 transactions per day. Integrated with Stripe and Plaid. Reduced payment failure rate by 30%. Tech stack: Node.js, Express, PostgreSQL, Redis, Stripe API.
Patient Data Exchange API for Telemedicine Platform
Developed a HIPAA-compliant REST API for sharing patient records between clinics. Handles 10,000+ requests per hour with 99.9% uptime. Tech stack: Python FastAPI, FHIR, PostgreSQL, AWS Lambda.
Inventory REST API for Multi-Vendor Ecommerce
Created a REST API that syncs inventory across 200+ vendors in real time. Reduced overselling by 95%. Tech stack: Go, PostgreSQL, Redis, RabbitMQ, Docker.
Third-Party Developer API for SaaS Platform
Built a public REST API with API keys, rate limiting, and usage analytics. Onboarded 500+ third-party developers in the first 3 months. Tech stack: Node.js, Express, MongoDB, Redis, Kong API Gateway.
Real Estate Listing API for MLS Integration
Developed a REST API that aggregates MLS listings from 50+ sources. Provides search, filtering, and geolocation endpoints. Tech stack: Python Django, PostgreSQL, Elasticsearch, Redis.
Student Data API for EdTech Platform
Built a FERPA-compliant REST API that connects student information systems (SIS) to learning management systems (LMS). Processes 1 million records per month. Tech stack: Java Spring Boot, PostgreSQL, Apache Kafka, Docker.
Why teams hire us.
Fixed Price, Not Hourly
Every REST API project gets a fixed price quote after the Roadmap phase (week 2). No hourly billing, no surprise invoices, no scope creep charges.
Senior Engineers Only
Every engineer on your project has 10+ years of experience. No junior developers, no offshore interns. You talk directly to the person writing your code.
8-12 Week Delivery
We ship production-ready REST APIs in 8-12 weeks. That includes design, build, testing, documentation, and deployment. No long delays.
Full Code Ownership
You own every line of code from day one. No licensing fees, no platform lock-in. Your source code sits in your own repository.
Built for Compliance
We build HIPAA, PCI-DSS, SOC 2, and FERPA compliant APIs. Our engineers know the security requirements and implement them from the start.
Proven Track Record
200+ products shipped across 50+ countries. 98% on-time delivery rate. Our APIs handle millions of requests per day for companies in healthcare, fintech, and SaaS.
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.