Top Rest API Development AgencyRest API
We build REST APIs that handle millions of requests per day. Ship your first endpoint in 2 weeks with no surprises.
IRPR is a top rest api development agency. We build REST APIs using Node.js, Python, Go, and Ruby on Rails. Every API gets a proper spec in OpenAPI 3.0 before a single line of code is written.
Your REST API ships in 8-12 weeks with a fixed price between $80K and $250K. We handle authentication (OAuth 2.0, JWT), rate limiting, documentation (Swagger/Redoc), and deployment on AWS or GCP. Compliance included: HIPAA, PCI-DSS, SOC 2, and FERPA.
We work with SaaS founders who need a scalable public API to launch their product. We help healthcare companies build HIPAA-compliant FHIR APIs. We partner with enterprise teams replacing legacy SOAP systems with modern REST endpoints.
Types of software we ship.
Public REST API
A consumer-facing API for third-party developers. Includes API keys, rate limits, and SDKs in 3 languages like Python, JavaScript, and Go.
Internal REST API
Connects your microservices, databases, and internal tools. Built with Express or FastAPI, secured with JWT and scoped permissions.
REST API for Mobile Apps
Power your iOS and Android apps with a dedicated backend. Handles push notifications via Firebase, file uploads to S3, and offline sync.
Ecommerce REST API
Manages products, carts, orders, and payments. Integrates with Stripe, Shopify, or a custom warehouse management system.
Healthcare REST API (FHIR)
Compliant with HIPAA and FHIR R4. Connects EHR systems like Epic or Cerner, handles patient data with end-to-end encryption.
Fintech REST API
Processes payments, manages accounts, and complies with PCI-DSS. Built with plaid and Stripe for bank integrations and KYC checks.
Real-time REST API with WebSockets
Delivers live data for chat, notifications, or dashboards. Uses Socket.io with Redis pub/sub to handle 10K+ concurrent connections.
Legacy API Migration to REST
Converts your SOAP, XML-RPC, or custom protocol to clean REST endpoints. Translates old data models into JSON with automated testing.
We build for every business type.
for SaaS platforms
for healthcare
for ecommerce and retail
for fintech
for logistics and travel
Why choose a top rest api development agency
Building a REST API in-house takes 6 months and $200K+ in engineering salaries before you write a single test.
Two hundred products shipped, 50 countries served. IRPR has built REST APIs for startups raising Series A and enterprises migrating 10-year-old systems. Our APIs handle 10 million requests per day on average. Every API includes a Postman collection and CI/CD pipelines from day one.
When you hire the top rest api development agency, you get a team that has done it before. We use Node.js (Express, Fastify), Python (FastAPI, Flask), and Go (Gin, Echo). We deploy on AWS Lambda for serverless or ECS for containers. We monitor every endpoint with Sentry and Datadog.
Generic dev shop vs top rest api development agency
Most agencies promise an API but deliver a spaghetti codebase with no documentation and no tests.
We have seen burnt budgets, broken integrations, and APIs that fail under 100 concurrent users. Generic shops treat APIs as a side project. They write code without specs, skip load testing, and disappear after launch.
IRPR delivers a production-ready REST API with full documentation, automated tests covering 90%+ of endpoints, and a deployment plan. We guarantee SLA of 99.9% uptime for every API we build. You own the code, the documentation, and the swagger spec.
- No spec before coding
- No load testing
- No CI/CD pipeline
- No documentation beyond code comments
- No uptime guarantee
- No security review
- OpenAPI spec approved before coding
- Load test to 10x expected traffic
- CI/CD with GitHub Actions and deployment to staging
- Auto-generated Swagger docs and Postman collection
- 99.9% uptime SLA guaranteed
- OWASP Top 10 penetration test completed
How we build your rest api
Our process from idea to deployed API takes exactly 8-12 weeks with 4 clear phases.
Phase 1: Spec and architecture. We define all endpoints, request/response models, and authentication in OpenAPI 3.0. You review and approve the spec before we write code. This phase takes 1 week.
Phase 2: Core endpoints. We build the main CRUD endpoints, implement auth (OAuth 2.0, JWT), and set up the database schema (PostgreSQL, MongoDB). You see a working API in week 3. Phase 3: Integration and documentation. We add external integrations (Stripe, HubSpot, Salesforce), write unit tests, and generate Swagger docs. Phase 4: Deployment and handoff. We deploy to AWS, set up monitoring, and train your team.
What ships with your rest api
Every API project includes everything you need to run, maintain, and scale from day one.
No hidden fees, no missing pieces. Every REST API ships with complete source code, automated deployment scripts, and a tested strategy for handling traffic spikes. Your team can take over immediately or we stay on for ongoing support.
- OpenAPI 3.0 spec document
- Postman collection with all endpoints
- Source code in your private GitHub repo
- CI/CD pipeline via GitHub Actions
- Docker compose for local development
- Deployment to AWS ECS or Lambda
- Sentry error tracking configured
- Datadog monitoring dashboard
- Load test results (k6 or Artillery)
- API key management system
What we ship in this practice.
Public API for a SaaS analytics platform
Built a REST API that ingests 500K events per day from customer apps. The API reduced data processing time from 15 minutes to 47 seconds. Stack: Node.js, PostgreSQL, Redis, and AWS Lambda.
HIPAA-compliant FHIR API for a telemedicine company
Created a REST API that connects the patient portal with Epic EHR. Handles 200K patient records with end-to-end encryption. Reduced onboarding time for new clinics by 60%. Stack: Python, FastAPI, PostgreSQL, AWS ECS.
Payment processing REST API for a fintech startup
Developed a PCI-DSS compliant API that processes 10K transactions per day. Integrated with Stripe and Plaid for bank verification. Compliance audit passed in first review. Stack: Go, Gin, PostgreSQL, Stripe API.
Ecommerce REST API for a multi-brand retailer
Built a unified product catalog API that aggregates data from 4 separate legacy systems. Syncs inventory in real time across 15 warehouses. API handles 3 million requests per day with 99.98% uptime. Stack: Node.js, Express, PostgreSQL, Redis.
Real estate MLS integration API
Created a REST API that pulls listings from 3 regional MLS systems and normalizes them into a single format. Reduced data ingestion time from 4 hours to 12 minutes. Stack: Python, FastAPI, PostgreSQL, AWS Lambda.
Fleet tracking REST API for a logistics company
Developed an API that collects GPS data from 2K vehicles every 30 seconds. Generates real-time ETAs and route optimization. Reduced fuel costs by 12% in the first quarter. Stack: Node.js, Socket.io, MongoDB, Redis.
Why teams hire us.
200+ APIs built
We have shipped over 200 REST API projects. Every API includes load testing, documentation, and a deployment plan. You get a proven playbook, not a first attempt.
8-12 week fixed timeline
We deliver a production-ready REST API in 8 to 12 weeks. The timeline is fixed in the Roadmap phase and we hit it 98% of the time. No scope creep, no delays.
Fixed price, not hourly
Your project gets a fixed quote during the Roadmap phase (week 1). The price covers spec, development, testing, documentation, deployment, and handoff. No surprises.
You own everything
Full source code, documentation, API keys, and deployment scripts are yours at the end of the project. No licensing fees, no lock-in, no recurring costs from us.
Compliance built in from day one
We build HIPAA, PCI-DSS, SOC 2, and FERPA compliant APIs. Your API is audit-ready from the first commit. We handle encryption, access controls, and logging.
Senior engineers only
Every developer on your project has 10+ years of experience and has shipped at least 5 production REST APIs. No juniors, no outsourcing, no handoffs to offshore teams.
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.