Premium Custom API Development ConsultantsAPI Development
We build custom APIs that power your product. Get a fixed-price quote in 2 weeks.
IRPR designs and builds custom APIs using REST, GraphQL, and gRPC protocols. We handle authentication with OAuth 2.0, rate limiting with Redis, and auto-generate documentation with Swagger and OpenAPI.
Every API project ships with source code in your repo, a CI/CD pipeline on GitHub Actions, and Postman collections. Timeline is 12-16 weeks for complex integrations. Pricing ranges from $100,000 to $350,000. We meet HIPAA, PCI-DSS, and SOC 2 compliance.
Startup CTOs needing a scalable API for their SaaS platform. Enterprise architects integrating legacy systems with modern microservices. Product managers launching a new data product that requires a secure API layer. Series A founders building an API-first platform.
Types of software we ship.
REST API Development
Build RESTful APIs with JSON and OAuth 2.0. We use Express.js or FastAPI for high throughput and easy maintenance.
GraphQL API Development
Create flexible GraphQL endpoints with Apollo Server. Clients query exactly what they need, reducing over-fetching.
gRPC API Development
High-performance gRPC APIs using Protocol Buffers. Ideal for microservices communication and low-latency systems.
Webhook Integration
Real-time event-driven webhooks with retry logic. We use Kafka or RabbitMQ for reliable delivery.
API Gateway Setup
Centralized API gateway with Kong or AWS API Gateway. Rate limiting, caching, and auth in one place.
API Security Audit
Penetration testing and OWASP Top 10 checks. We harden endpoints against injection, broken auth, and data exposure.
API Documentation
Interactive docs with Swagger UI and Postman collections. Auto-generated from code so they never go stale.
API Monetization
Stripe integration for usage-based billing. Metered API keys and subscription tiers with real-time analytics.
We build for every business type.
SaaS platforms
Fintech
Healthcare
Ecommerce
Enterprise
Why premium custom API development matters
Custom APIs are the backbone of modern software products.
Off-the-shelf APIs rarely fit your exact business logic. A custom API built by experienced consultants ensures your data flows securely and quickly between systems. IRPR has shipped over 200 APIs across 50 countries, each tailored to the client's specific requirements.
Our APIs handle authentication, rate limiting, and monitoring out of the box. We use Redis for caching, Datadog for observability, and Sentry for error tracking. Every API is load-tested with k6 before deployment.
The difference between generic and premium API consulting
Not all API consultants deliver production-ready code.
Generic agencies often reuse boilerplate code and lack deep expertise in security and compliance. They may deliver an API that works in demo but fails under load or fails security audits.
IRPR assigns senior engineers with 10+ years of experience. We write every API from scratch, optimized for your use case, and include load testing, security hardening, and full documentation.
- No fixed timeline or price
- Hidden costs for changes
- No post-launch support
- Generic boilerplate code
- No compliance expertise
- Unclear code ownership
- Fixed price from the start
- Source code ownership
- HIPAA, PCI, SOC 2 compliance
- 12-14 week delivery
- CI/CD and monitoring included
- Senior engineers only
Our API development process
We follow a 4-phase process to deliver production-ready APIs.
Each phase has clear deliverables and checkpoints. We use weekly demos and daily standups to keep you informed. The process is designed to eliminate surprises and ensure on-time delivery.
From requirements to deployment, we document every decision. Our APIs include auto-generated OpenAPI specs and Postman collections so your team can start integrating immediately.
What you get with every API project
Every deliverable is concrete and yours.
We don't just hand over code. You get a complete production-ready system with monitoring, documentation, and deployment scripts.
- Source code in your GitHub repo
- CI/CD pipeline with GitHub Actions
- Postman collection with all endpoints
- Swagger/OpenAPI documentation
- Docker compose for local development
- Sentry error tracking
- Datadog monitoring dashboard
- Load testing results (k6)
- Security audit report
- Deployment runbook
What we ship in this practice.
Payment API for a fintech startup
Built a RESTful payment API handling 10,000 transactions per minute with Stripe integration. Reduced chargeback rate by 40% using fraud detection middleware. Tech: Node.js, PostgreSQL, Redis, Stripe API.
Patient data API for a telehealth platform
Developed a FHIR-compliant API for EHR integration. Achieved HIPAA compliance and reduced data sync time from 24 hours to 5 minutes. Tech: Python FastAPI, HL7 FHIR, AWS HealthLake.
Product catalog API for an ecommerce brand
Created a GraphQL API serving 500,000 SKUs with sub-100ms response times. Enabled real-time inventory sync across 3 warehouses. Tech: Apollo Server, MongoDB, Redis, Shopify API.
CRM integration API for a SaaS company
Built a webhook-based API to sync leads from Salesforce to internal CRM. Reduced manual data entry by 8 hours per week. Tech: Node.js, Salesforce REST API, RabbitMQ.
IoT data ingestion API for a logistics firm
Designed a gRPC API handling 1 million sensor readings per hour. Enabled real-time fleet tracking and reduced fuel costs by 15%. Tech: Go, gRPC, InfluxDB, Kafka.
Analytics API for a media platform
Developed a REST API serving aggregated metrics to 50 dashboard clients. Cut query time from 5 seconds to 200ms using materialized views. Tech: Django REST Framework, PostgreSQL, Redis.
Why teams hire us.
Fixed price, not hourly
Every project gets a fixed quote in the Roadmap phase (week 2). No hourly billing, no surprise invoices, no scope creep charges.
Senior engineers only
Our team consists of engineers with 10+ years experience. No junior developers, no offshore outsourcing.
Compliance built-in
We handle HIPAA, PCI-DSS, and SOC 2 requirements from day one. Our APIs are audited and documented for security.
12-14 week delivery
Most API projects ship in 12-14 weeks. We use a streamlined process with weekly demos and daily standups.
Full code ownership
You own all source code, documentation, and intellectual property. No licensing fees, no vendor lock-in.
Post-launch support
We provide 30 days of post-launch support and a 99.9% uptime SLA. Monitoring with Datadog and PagerDuty included.
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.