Premium Custom API Development AgencyAPI Development
We build high-performance APIs for your product. Fixed price, senior engineers, and delivery in 8-12 weeks.
IRPR builds custom APIs using REST, GraphQL, gRPC, and WebSockets. We design for performance, security, and scalability from day one.
Every project ships with a production-ready API, OpenAPI/Swagger docs, Postman collections, and a CI/CD pipeline. Typical delivery is 8-12 weeks for an MVP, with pricing from $80K to $250K. We build to HIPAA, PCI-DSS, and SOC 2 standards.
CTOs who need a secure payment API for fintech. Product managers building a data aggregation service. Startup founders launching a platform with real-time APIs. Enterprise teams integrating legacy systems.
Types of software we ship.
REST API Development
Build RESTful APIs with OpenAPI 3.0 spec. Supports JSON, XML, and OAuth2. Integrated with Stripe, Twilio, AWS.
GraphQL API Development
Develop GraphQL APIs with Apollo or Relay. Single endpoint, typed schema, real-time subscriptions. Tools: Apollo Server, Prisma.
gRPC API Development
Build high-performance gRPC services using Protocol Buffers. Ideal for microservices and low-latency systems. Uses Go, Node.js.
Webhook Integration API
Create webhook receivers and dispatchers for event-driven systems. Supports retries, logging, and authentication. Integrates with Zapier, Slack.
Third-Party API Integration
Connect your product to Salesforce, HubSpot, Shopify, or custom APIs. Handles rate limiting, error handling, and data mapping.
API Gateway & Aggregation
Build an API gateway that aggregates multiple backend services. Uses Kong, Tyk, or custom middleware. Includes caching, auth, and rate limiting.
Real-Time API with WebSockets
Develop real-time APIs using WebSockets and Socket.IO. For live chat, notifications, and streaming data. Works with Redis, AWS IoT.
API Security & Authentication
Implement secure API authentication with JWT, OAuth2, or SAML. Includes API key management, role-based access, and audit logs.
We build for every business type.
Fintech
Healthcare
Ecommerce
SaaS
Logistics & Travel
Our API Development Track Record
We have built over 200 APIs for clients in 50 countries.
Our APIs power everything from payment processing to real-time chat. Each API goes through security review and load testing before release.
We maintain a 98% on-time delivery rate and 99.9% uptime SLA. Every project includes monitoring with Datadog and error tracking with Sentry.
Why Choose IRPR for API Development
Not all custom API development agencies deliver the same quality.
Many agencies use junior developers and generic templates. They deliver over budget and behind schedule.
IRPR assigns senior engineers only. We use an Idea-Roadmap-Product-Release process with fixed pricing. You get source code ownership and a scalable API from day one.
- Vague estimates and hourly billing
- Junior developers with little oversight
- No API documentation by default
- Limited security testing
- Scope creep and missed deadlines
- No post-launch support
- Fixed price from the Roadmap phase
- Senior engineers only (10+ years avg)
- OpenAPI/Swagger docs included
- Penetration testing and OWASP review
- 8-12 week delivery with milestones
- 30 days of maintenance included
Our API Development Process
We follow a structured 4-phase process to deliver your API.
Each phase has clear deliverables and a fixed timeline. You know exactly what you get and when.
This process eliminates surprises and ensures the API meets your exact requirements.
What Ships With Your API
Every project includes these deliverables by default.
No hidden extras. Everything listed here is part of the fixed price.
You own all code, documentation, and artifacts.
- Source code in your private GitHub repo
- OpenAPI 3.0 / GraphQL schema documentation
- Postman / Insomnia collection for testing
- CI/CD pipeline with GitHub Actions or GitLab
- Dockerized services with docker-compose
- Unit tests and integration tests (80%+ coverage)
- API key management or OAuth2 integration
- Sentry error tracking and Datadog monitoring
- Deployment playbook for AWS/GCP/Azure
- 30 days of post-launch support
What we ship in this practice.
Payment Processing API for Fintech
Built a REST API for a neobank that processes 10,000 transactions daily. Integrated with Plaid for bank connections and Stripe for card processing. Reduced manual reconciliation by 15 hours/week.
Real-Time Chat API for SaaS
Developed a WebSocket-based chat API using Socket.IO and Redis. Supports 50,000 concurrent connections. Used by a customer support platform to provide in-app messaging.
Inventory Management API for Ecommerce
Created a GraphQL API for a multi-warehouse ecommerce brand. Integrated with Shopify and custom WMS. Enabled real-time inventory sync across 10 locations.
Patient Data API for Healthcare
Built a HIPAA-compliant FHIR API for a telemedicine startup. Handles PHI data with encryption and audit logs. Reduced patient data retrieval time from 5 minutes to 2 seconds.
Fleet Tracking API for Logistics
Developed a REST API for a logistics company to track 500+ vehicles in real-time. Integrates GPS data, route optimization, and driver messages. Cut delivery delays by 20%.
Property Data Aggregation API for Real Estate
Built an API that aggregates MLS listings from 50+ sources into one endpoint. Uses Elasticsearch for fast search. Enables a real estate platform to serve 1 million property records.
Why teams hire us.
Senior Engineers Only
Every API project is staffed with engineers who have 10+ years of experience. No juniors, no offshore teams. You get a lead architect who has shipped production APIs before.
Fixed Price, Not Hourly
We give a fixed price quote in the Roadmap phase (week 2). No hourly billing, no surprise invoices, no scope creep. The price covers everything in the spec.
Security by Default
We build APIs with OWASP Top 10 protections, rate limiting, and input validation. Every project includes a basic penetration test. For regulated industries, we achieve HIPAA, PCI, or SOC 2 compliance.
Documentation and Testing Included
You receive OpenAPI specs, Postman collections, and integration tests. Our CI/CD runs tests on every commit. You don't pay extra for docs.
8-12 Week Delivery
Our process is optimized for speed. We ship an MVP API in as little as 8 weeks. We have delivered 200+ products on time with a 98% on-time rate.
Full Ownership and Transparency
You own 100% of the code, docs, and IP. We never lock you in. You get access to our project management tool and daily standups.
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.
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