How long does it take to build a custom API?

IRPR delivers production-ready APIs in 8-12 weeks. A simple REST API with 10 endpoints can ship in 8 weeks. A complex GraphQL API with integrations takes 12 weeks.

What tech stack do you use for custom API development?

IRPR uses Node.js, Go, Python, and PostgreSQL for most APIs. We also use Redis for caching, RabbitMQ for message queues, and Docker for containerization. We choose the best stack for your use case.

Can you integrate my API with Salesforce or Stripe?

Yes. IRPR has built integrations with Salesforce, Stripe, HubSpot, Slack, and 50+ other services. We handle rate limits, webhooks, and error handling. Every integration is tested with automated tests.

Do you build HIPAA-compliant APIs?

Yes. IRPR builds HIPAA-compliant APIs for healthcare clients. We use encrypted data at rest and in transit, audit logging, and BAA agreements. We have shipped 15+ HIPAA-compliant APIs.

Who owns the code after the project?

You own everything. IRPR hands over the full source code in your GitHub repo, all infrastructure as code, and complete documentation. No licensing fees, no restrictions.

How quickly can we start?

IRPR can start the Roadmap phase within 1-2 weeks of signing. We schedule a kickoff call, set up your GitHub repo, and begin defining the API contract. Most projects start within 10 business days.

Do you offer ongoing support after launch?

Yes. IRPR includes 30 days of post-launch support with a 4-hour response SLA. After that, we offer monthly retainer packages starting at $5K per month for monitoring, maintenance, and feature updates.

studio.online·50+ countries

est. 2026·parent: irpr.agency ↗

200+ APIs shipped

Best Custom API Development FirmAPI Development

We build production-grade APIs in 8-12 weeks. Fixed price, no surprises.

See our work

200+Products shipped

12wkAverage MVP timeline

50+Countries served

99.9%API uptime

─── [ how it works ] ───

Idea

discovery + brief

wk 1-2

Roadmap

architecture + price

wk 2

Product

design + build + test

wk 3-12

Release

launch + support

wk 12+

what ships

Source codeCI/CDTestsDocsMonitoringHandoff

compliance ready

RESTGraphQLgRPC

IRPR is the best custom API development firm for companies that need reliable, scalable APIs. We build REST, GraphQL, and gRPC APIs using Node.js, Go, Python, and PostgreSQL.

Every API ships with a CI/CD pipeline, automated tests, and monitoring in 8-12 weeks. Pricing is fixed from $80K to $250K depending on complexity. We comply with HIPAA, PCI-DSS, and SOC 2.

CTOs hire us to replace legacy integrations. Product managers hire us to launch new features faster. Startup founders hire us to build their core platform without hiring a full team.

─── [ what we build ] ───

Types of software we ship.

REST API Development

Build stateless REST APIs with OpenAPI specs. Use Express.js, FastAPI, or Django REST Framework.

GraphQL API Development

Flexible GraphQL APIs with Apollo Server or Hasura. Reduce over-fetching and speed up frontend development.

gRPC API Development

High-performance gRPC APIs for microservices. Use Protocol Buffers and bidirectional streaming.

Third-Party API Integration

Connect your app to Stripe, Salesforce, HubSpot, or Slack. Handle rate limits, retries, and webhooks.

API Gateway Development

Centralized API gateways with Kong or AWS API Gateway. Add authentication, rate limiting, and logging.

Webhook System Development

Reliable webhook delivery systems with retry logic and idempotency. Use Redis queues and PostgreSQL.

Internal API Development

Private APIs for internal microservices. Use service mesh, mTLS, and gRPC for low-latency communication.

API Security Audit & Hardening

Audit existing APIs for OWASP Top 10 vulnerabilities. Add JWT, OAuth 2.0, and API key rotation.

─── [ built for your business ] ───

We build for every business type.

API for

Healthcare

EHR integration APIsHIPAA-compliant patient data APIstelehealth video APIsclaims processing APIspharmacy inventory APIslab result APIs

API for

Fintech

payment gateway APIsKYC/AML verification APIsbanking data aggregation APIsfraud detection APIsloan origination APIscrypto exchange APIs

API for

Ecommerce

product catalog APIsorder management APIsinventory sync APIsshipping rate APIspayment processor APIscustomer review APIs

API for

SaaS

user management APIsbilling and subscription APIsanalytics reporting APIsnotification APIsmulti-tenant data APIsSSO integration APIs

API for

Logistics

real-time tracking APIsroute optimization APIswarehouse inventory APIscarrier rate APIsdelivery confirmation APIsfleet management APIs

/01

Why IRPR is the best custom API development firm

We have shipped over 200 APIs for clients in 50+ countries.

Every API we build includes automated testing, monitoring, and documentation. We use OpenAPI 3.0 for REST and SDL for GraphQL. Our APIs handle 10,000+ requests per second on average.

We follow strict compliance standards. Healthcare APIs meet HIPAA requirements. Fintech APIs pass PCI-DSS Level 1 audits. SaaS APIs are SOC 2 Type II certified.

APIs shipped

200+

Average delivery time

12wk

API uptime SLA

99.9%

Countries

50+

/02

The difference between IRPR and generic dev shops

Most agencies deliver broken APIs with no documentation or tests.

Generic dev shops write code without specs. They skip automated tests and monitoring. You get an API that breaks at 2 AM and no one answers the phone.

IRPR delivers production-grade APIs with OpenAPI specs, 90%+ test coverage, and Datadog monitoring. We include a 30-day warranty after launch.

the difference

✗ generic dev shop

No API specification
No automated tests
No monitoring or alerts
No documentation
No security audit
No post-launch support

✓ IRPR

OpenAPI 3.0 or SDL spec
90%+ test coverage
Datadog monitoring + PagerDuty alerts
Auto-generated docs with Swagger UI
OWASP Top 10 security review
30-day warranty with SLA

/03

How we build your custom API in 8-12 weeks

Our process is designed to ship fast without cutting corners.

We start with a 2-week Roadmap phase where we define the API contract, data model, and security requirements. You get a fixed price and timeline before any code is written.

Then we build in 2-week sprints. You see working endpoints every sprint. We deploy to staging after sprint 2 and production after sprint 4.

Roadmap

Define API endpoints, data models, and auth strategy. You get a fixed quote and timeline. Takes 2 weeks.

Sprint 1-2

Build core endpoints with tests. Deploy to staging environment. You test and give feedback.

Sprint 3-4

Add integrations, error handling, and monitoring. Run load tests. Deploy to production.

Launch + Warranty

Go live with documentation and dashboards. We monitor for 30 days and fix any issues.

/04

What ships with every custom API

You get more than just code. Every API includes these deliverables.

We hand over full ownership of the source code, infrastructure, and documentation. No black boxes, no vendor lock-in.

ships by default

Source code in your GitHub repo
OpenAPI 3.0 or GraphQL SDL specification
CI/CD pipeline with GitHub Actions
Automated test suite with 90%+ coverage
Docker containers for local development
Datadog monitoring dashboard
PagerDuty alerting for errors
Swagger UI or GraphQL Playground
Postman collection for manual testing
30-day post-launch support

─── [ use cases ] ───

What we ship in this practice.

healthcare

Healthcare EHR Integration API

Built a HIPAA-compliant API to sync patient records between a clinic's EHR and a telemedicine platform. Reduced manual data entry by 8 hours per week. Tech stack: Node.js, PostgreSQL, FHIR R4.

◆ shipped pattern

fintech

Fintech Payment Gateway API

Developed a PCI-DSS Level 1 compliant payment gateway API for a fintech startup. Processed $2M in transactions in the first month. Tech stack: Go, Stripe Connect, Redis.

◆ shipped pattern

ecommerce

Ecommerce Inventory Sync API

Created a real-time inventory sync API between Shopify and a warehouse management system. Eliminated overselling and saved $50K in refunds per year. Tech stack: Python, FastAPI, RabbitMQ.

◆ shipped pattern

saas

SaaS Multi-Tenant User API

Built a multi-tenant user management API for a B2B SaaS platform. Supported 500+ tenants with isolated data. Tech stack: Node.js, PostgreSQL, JWT.

◆ shipped pattern

logistics

Logistics Real-Time Tracking API

Developed a real-time tracking API for a logistics company. Integrated with GPS devices and provided ETA updates every 30 seconds. Tech stack: Go, WebSockets, Redis.

◆ shipped pattern

media

Media Content Delivery API

Built a CDN-backed API for a media company to serve video thumbnails and metadata. Reduced load times by 60%. Tech stack: Node.js, CloudFront, S3.

◆ shipped pattern

─── [ why irpr ] ───

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.

Senior engineers only

Our team averages 10+ years of experience. Every engineer has shipped at least 5 production APIs. No juniors, no offshore outsourcing.

Compliance built in

We build HIPAA, PCI-DSS, and SOC 2 compliant APIs from day one. No retrofitting. Our compliance checklist is part of every sprint.

Full ownership

You own the source code, infrastructure, and documentation. No licensing fees, no lock-in. We hand over everything in your GitHub repo.

8-12 week delivery

We ship production-ready APIs in 8-12 weeks. Our record is 6 weeks for a REST API with 15 endpoints and Stripe integration.

30-day warranty

After launch, we monitor your API for 30 days and fix any issues within 4 hours. No extra cost. We stand behind our work.

─── [ how we engage ] ───

Idea → Roadmap → Product → Release.

Every engagement runs through the same four-stage pipeline. Predictable by design.

stage · 01

I·1

Idea

discovery · brief

stage · 02

R·2

Roadmap

architecture · plan

stage · 03

P·3

Product

design · build · ship

stage · 04

R·4

Release

rollout · handoff

─── [ faq ] ───

Questions clients ask first.

IRPR charges a fixed price between $80K and $250K for most custom API projects. The exact price is determined during the 2-week Roadmap phase. We never bill hourly.

─── [ explore ] ───

Related services and industries.

Services

Web App Development Mobile App Development AI Integration SaaS MVP Development Ecommerce Development Cloud & DevOps UI/UX Design Data & Analytics

Industries

Healthcare Fintech E-commerce SaaS Real Estate EdTech Manufacturing Logistics Media Travel

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.

─── share this page ───

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