Premium REST API Development AgencyREST API
We build secure, production-ready REST APIs that scale from MVP to millions of requests. Get a fixed-price quote and ship in 8-12 weeks.
IRPR is a premium REST API development agency that builds high-performance APIs using Node.js, Python (Flask/FastAPI), and Go. We design every endpoint with OpenAPI 3.0 specifications and secure them with OAuth 2.0, JWT, or API keys based on your use case.
Every project ships with a complete API suite: interactive Swagger documentation, auto-generated SDKs, CI/CD pipelines on GitHub Actions, Datadog monitoring, and Sentry error tracking. 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.
We work with startup CTOs who need a scalable API for their SaaS platform, enterprise architects replacing legacy monolithic backends, product managers launching an API-first product, and fintech founders requiring PCI-compliant payment APIs.
Types of software we ship.
Payment Processing REST API
Handle transactions, refunds, and subscriptions with Stripe or Braintree integration. Built for PCI-DSS Level 1 compliance.
CRM Integration REST API
Sync contacts, deals, and activities with Salesforce, HubSpot, or Zoho. Designed for bi-directional data flow with conflict resolution.
Inventory Management REST API
Track stock levels, warehouse movements, and order fulfillment. Integrates with ERP systems like NetSuite or SAP.
Authentication Service REST API
Provide SSO, MFA, and role-based access using Auth0 or custom JWT. Supports OAuth 2.0 and SAML out of the box.
Data Aggregation REST API
Pull data from multiple sources (SQL databases, third-party APIs, CSV files) and expose a unified RESTful interface.
IoT Device REST API
Ingest sensor data, send commands to devices via MQTT, and manage device registrations. Handles 10,000+ concurrent connections.
AI Model Inference REST API
Wrap ML models (PyTorch, TensorFlow, Hugging Face) into scalable endpoints. Supports GPU acceleration and batching.
File Storage REST API
Upload, download, and manage files with S3-compatible object storage. Includes virus scanning and CDN caching.
We build for every business type.
Fintech
Healthcare
Ecommerce
SaaS Platforms
Logistics & Supply Chain
Why a Premium REST API Development Agency Matters
Your API is the backbone of your product -- it must be fast, secure, and maintainable from day one.
Generic development shops often cut corners: no rate limiting, no versioning, no automated testing. At IRPR, every REST API we build includes OpenAPI specs, auto-generated docs, and load testing that proves 99.9% uptime under traffic.
We have shipped 200+ API products across 50+ countries. Our clients see a 40% faster time-to-market because we reuse battle-tested modules for auth, logging, monitoring, and deployment. You get a production-grade API, not a prototype.
How IRPR outpaces Generic Dev Shops
A generic shop delivers an API that works today but breaks tomorrow. IRPR builds APIs that survive acquisition, audit, and scaling.
We start with a 2-week Roadmap phase where you get a fixed-price contract, delivery timeline, and API specification. No hourly billing, no scope creep, no surprises. Every endpoint is designed with versioning (v1, v2) from day one.
After launch, you receive full ownership of the code, CI/CD pipeline, and infrastructure-as-code (Terraform, Pulumi). Our APIs include built-in monitoring with Datadog and Sentry, so you see errors before customers do.
- hourly billing with no cap
- junior developers on your project
- no OpenAPI spec provided
- zero load testing before launch
- no monitoring or alerting
- code ownership ambiguous
- fixed price from $80K, agreed in week 2
- senior engineers only (7+ years exp)
- OpenAPI 3.0 spec delivered upfront
- load testing up to 10,000 req/s
- Datadog + Sentry monitoring included
- full code and infra ownership
Our REST API Development Process
From idea to production in 8-12 weeks. We follow a four-phase process designed for speed and quality.
Each phase has clear deliverables and checkpoints. You review working software at the end of every phase, not just demos. If priorities shift, we adapt the roadmap without breaking the budget or timeline.
The process works for startups needing an MVP and for enterprises replacing legacy APIs. We have built APIs for healthcare (HIPAA), fintech (PCI-DSS), and SaaS (SOC 2) clients using the same repeatable framework.
What Ships With Every API Project
You get more than endpoints. Every IRPR API includes the infrastructure and tools to run in production from day one.
We automate everything: tests run on every pull request, deployments are one click, and monitoring alerts go to your Slack or PagerDuty. If you need to add a new endpoint later, the OpenAPI spec makes it easy for your team or another agency.
All deliverables are in your AWS, GCP, or Azure account -- we never hold anything hostage. You can run the API yourself immediately after the final commit.
- REST API source code in your private GitHub repo
- OpenAPI 3.0 specification (YAML/JSON)
- Interactive Swagger UI documentation
- Auto-generated client SDKs (Python, JavaScript, Java)
- CI/CD pipeline with GitHub Actions or GitLab CI
- Infrastructure-as-code (Terraform or Pulumi)
- Sentry error tracking with alerting
- Datadog dashboards for latency, errors, and throughput
- Load testing script (k6) with baseline results
- Postman collection for manual testing
What we ship in this practice.
B2B Payment REST API for a Lending Platform
IRPR built a PCI-DSS Level 1 compliant payment API that processes $12M in monthly transactions. The API integrates with Plaid for bank verification and Stripe for ACH transfers. Reduced manual reconciliation from 20 hours per week to near zero. Tech stack: Node.js, PostgreSQL, Stripe API, Plaid API.
HIPAA-Compliant EHR API for a Telehealth Startup
Designed a REST API to exchange patient records, appointments, and prescriptions across 150+ clinics. The API handles 50,000 requests per day with 99.99% uptime. Audit logs are immutable and stored for 7 years. Tech stack: Python FastAPI, PostgreSQL, FHIR R4, AWS HealthLake.
Inventory Sync API for a Multi-Channel Ecommerce Brand
Built a REST API that synchronizes inventory across Shopify, Amazon, and a custom warehouse system. The API reduced overselling by 80% and cut order processing time from 3 hours to 12 minutes. Tech stack: Node.js, Redis, Shopify API, Amazon MWS.
Authentication and Authorization API for a SaaS Platform
Created a centralized auth API using OAuth 2.0 and OpenID Connect that supports 50,000 users and role-based access per tenant. The API integrates with Active Directory and Google Workspace. Reduced login latency by 60%. Tech stack: Go, PostgreSQL, Auth0, Redis.
Real-Time Tracking API for a Logistics Company
Developed a REST API that receives GPS data from 5,000+ trucks and exposes route optimization endpoints. The API handles 1,000 write requests per second and calculates ETA with 95% accuracy. Tech stack: Node.js, MongoDB, Kafka, Google Maps API.
Content Management API for a Media Platform
Built a REST API to serve articles, images, and videos to mobile apps and websites. The API uses a CDN-based deliverable with cache invalidation and supports multi-language content. Reduced page load time by 40%. Tech stack: Python Django, PostgreSQL, CloudFront, Elasticsearch.
Why teams hire us.
Fixed price, not hourly
Every project gets a fixed quote during the Roadmap phase (week 2). No hourly billing, no surprise invoices, no scope creep charges. You know the exact cost before we write a line of code.
Senior-only engineering team
Our team averages 10+ years of experience. No junior developers. Each IRPR project is staffed with a lead architect, 2-3 senior engineers, and a QA specialist. You get real expertise, not a learning curve.
Compliance-ready from day one
We have built APIs for HIPAA, PCI-DSS, SOC 2, FERPA, and ISO 9001 environments. Security controls are part of our template: encryption at rest, encryption in transit, access logs, and audit trails are always included.
OpenAPI-first design
Every API starts with an OpenAPI 3.0 specification. You review the contract before any backend code is written. This eliminates misunderstanding and speeds up client-side development by 2 weeks on average.
Integrated monitoring and error tracking
We ship Datadog dashboards and Sentry error tracking as part of every project. You get alerts for 4xx errors, 5xx errors, and latency spikes. Our average time to detect and fix errors is under 10 minutes.
Post-delivery support included
Every project includes 90 days of post-launch support. We fix bugs, answer questions, and help your team extend the API. After 90 days, you can continue with a maintenance retainer or go fully independent.
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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