Leading Custom API Development AgencyAPI Development
We design and build custom APIs for startups and enterprises. Get a secure, scalable API in 8-12 weeks with fixed pricing.
IRPR builds custom APIs using Node.js, Python, Go, and GraphQL. We design RESTful and event-driven architectures for high-traffic applications.
Projects ship with full documentation, Postman collections, and CI/CD pipelines. Typical timeline is 8-12 weeks with fixed pricing from $80K to $250K. All APIs comply with HIPAA, PCI-DSS, or SOC 2 as needed.
CTOs at SaaS companies needing a scalable API for their platform. Healthcare startups requiring HIPAA-compliant data exchange. Fintech firms building PCI-DSS certified payment APIs. Ecommerce brands integrating custom checkout and inventory APIs.
Types of software we ship.
REST API
Build stateless REST APIs with OpenAPI 3.0 specs. We use Express.js, Django, or Spring Boot for high-performance endpoints.
GraphQL API
Develop flexible GraphQL APIs with Apollo Server. Reduce over-fetching and enable rapid frontend iteration.
Webhook Integration
Create event-driven webhook systems using Stripe, Twilio, or Slack APIs. Real-time data sync for your app.
API Gateway
Implement API gateways with Kong or AWS API Gateway. Centralize authentication, rate limiting, and monitoring.
Microservices API
Design microservices architectures with gRPC or RabbitMQ. Decouple services for scalability and independent deployment.
Real-time API (WebSocket)
Build real-time APIs with Socket.io or WebSockets for live dashboards, chat, and notifications.
Third-party API Integration
Integrate with Salesforce, HubSpot, Shopify, or QuickBooks APIs. Unified data flow across your stack.
Internal API (B2B)
Create internal APIs for partner integrations using OAuth 2.0 and API keys. Secure data exchange between systems.
We build for every business type.
Healthcare
Fintech
Ecommerce
SaaS
Logistics
Why custom API development matters
A well-designed API is the backbone of modern software.
Every integration, every data sync, every mobile app relies on a solid API. A poorly built API leads to downtime, security holes, and slow development.
IRPR has delivered 200+ custom APIs across 50 countries. Our APIs handle millions of requests per day with 99.9% uptime and full compliance.
IRPR vs generic dev shops
Not all API development is equal.
Many agencies skip documentation, security reviews, and CI/CD. You end up with an API that breaks in production and no one can maintain.
IRPR builds production-ready APIs with full documentation, automated tests, and compliance built-in. You get a reliable API that ships on time and on budget.
- No API documentation
- No security review
- No CI/CD pipeline
- Hourly billing surprises
- Unclear ownership
- No post-launch support
- Full OpenAPI 3.0 docs
- HIPAA/PCI-DSS compliance built-in
- Automated CI/CD with GitHub Actions
- Fixed price from $80K
- You own all code and IP
- 12 months of support included
Our API development process
We follow a 4-phase process to ship your API.
Every project starts with a 2-week Roadmap phase where we define endpoints, data models, and integrations. You get a detailed specification and fixed quote before any development.
Development takes 6-8 weeks with weekly demos and automated testing. We deploy to your cloud and hand over full documentation and monitoring.
What ships with your API
Every API project includes these deliverables by default.
You get everything needed to maintain and scale your API from day one. No hidden extras, no missing pieces.
- Source code in your repo
- OpenAPI 3.0 specification
- Postman collection with examples
- CI/CD pipeline on GitHub Actions
- Sentry error tracking
- Cloud deployment scripts (Terraform)
- API monitoring dashboard
- Security audit report
- User authentication (OAuth 2.0 / JWT)
- 12 months of bug fixes and support
What we ship in this practice.
Healthcare data exchange API
Built a HIPAA-compliant API for a telemedicine platform. Reduced patient data retrieval time by 60% using FastAPI and PostgreSQL. Stack: FastAPI, PostgreSQL, AWS Lambda.
Payment processing API for fintech
Developed a PCI-DSS certified API for a lending startup. Processed 10,000 transactions per day with 99.99% uptime. Stack: Node.js, Stripe, Redis, Docker.
Ecommerce inventory sync API
Created a real-time inventory API syncing Shopify and warehouse systems. Cut stock discrepancies by 90% with WebSocket updates. Stack: GraphQL, Apollo, MongoDB, AWS AppSync.
SaaS platform integration API
Built a public API for a CRM SaaS, enabling third-party integrations. Onboarded 50+ partners in the first quarter. Stack: Django REST Framework, OAuth 2.0, Celery.
Real-time logistics tracking API
Developed a WebSocket-based tracking API for a fleet management system. Reduced delivery time reporting from 24 hours to real-time. Stack: Socket.io, Node.js, PostGIS, Redis.
EdTech gradebook API
Designed a FERPA-compliant API for a school management platform. Automated grade syncing across 200 schools. Stack: GraphQL, Prisma, PostgreSQL, AWS RDS.
Why teams hire us.
Fixed price, not hourly
Every API project gets a fixed quote in the Roadmap phase (week 2). No hourly billing, no surprise invoices, no scope creep charges.
You own the code and IP
We transfer full ownership of all source code and documentation upon completion. No licensing fees, no vendor lock-in.
Built for compliance from day one
Our APIs are designed for HIPAA, PCI-DSS, SOC 2, and FERPA from the first endpoint. We include security audits and penetration testing in every project.
Senior engineers only
Our team consists of senior developers with 10+ years of experience. No junior developers, no offshore outsourcing, no code quality issues.
12 months of support included
We provide 12 months of bug fixes, security patches, and uptime monitoring after launch. You get a dedicated support channel with 4-hour response time.
98% on-time delivery
We have shipped 200+ products with a 98% on-time delivery rate. Our 8-12 week timeline is realistic and we meet it.
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.