Experienced API Integration Development AgencyAPI Integration
We build custom API integrations that connect your tools and automate workflows. Get a fixed price and a senior team in 8-12 weeks.
IRPR is an experienced API integration development agency. We build custom integrations using Node.js, Python, Express, AWS Lambda, and tools like Stripe, Salesforce, and HubSpot APIs.
Every project ships in 8-12 weeks with fixed pricing from $80K to $250K. We follow SOC 2, HIPAA, and PCI-DSS compliance standards for security and data handling.
Our clients include CTOs scaling a SaaS platform, product managers syncing data across CRM and ERP, founders connecting payment gateways, and IT directors automating logistics workflows.
Types of software we ship.
REST API Integration
Connect RESTful services with authentication, rate limiting, and error handling. Uses Swagger/OpenAPI for documentation.
GraphQL API Integration
Build flexible GraphQL wrappers over existing APIs. Uses Apollo Server and schema stitching for unified data access.
Webhook Integration
Receive and send real-time events via webhooks. Includes retry logic, signature verification, and monitoring with Datadog.
Third-Party API Integration
Integrate with Stripe, Salesforce, HubSpot, Slack, and 100+ other SaaS APIs. Handles OAuth2 and API versioning.
Custom API Development
Design and build new APIs from scratch. Uses Node.js, Express, or Python FastAPI with PostgreSQL or MongoDB.
API Gateway Setup
Deploy API gateways with Kong or AWS API Gateway for traffic management, caching, and security policies.
Data Pipeline Integration
Build ETL pipelines using Fivetran, Airbyte, or custom scripts to sync data between databases and SaaS apps.
Real-Time API Integration
Implement WebSocket or Server-Sent Events for live data updates. Uses Socket.io and Redis for pub/sub messaging.
We build for every business type.
Ecommerce
SaaS
Healthcare
Fintech
Logistics
Why hire an experienced API integration development agency?
IRPR has shipped over 200 API integrations across 50+ countries with 98% on-time delivery.
Generic developers often miss security patterns like OAuth2 token refresh or rate limiting. We build every integration with retry logic, circuit breakers, and monitoring from day one.
Our team has deep experience with compliance-heavy APIs in healthcare (HIPAA), finance (PCI-DSS), and SaaS (SOC 2). We handle data mapping, error handling, and documentation as standard practice.
Generic dev shop vs experienced API integration agency
Most developers can copy an API call. IRPR builds production-grade integrations that handle errors, scale, and comply with regulations.
A generic agency might deliver a working endpoint but skip error handling, monitoring, and documentation. You end up with fragile integrations that break when APIs update.
IRPR treats every integration as a product. We add retry logic, rate limiting, Datadog dashboards, and OpenAPI specs. Your team can maintain it without calling us.
- No API security standards for OAuth or tokens
- No error handling patterns or retries
- No monitoring or alerting setup
- No rate limiting or caching
- No documentation beyond code comments
- No integration tests in CI pipeline
- SOC 2 compliant authentication and data handling
- Built-in retry with exponential backoff and circuit breaker
- Datadog monitoring with custom dashboards and alerts
- API Gateway with rate limiting and response caching
- OpenAPI 3.0 documentation auto-generated
- Integration tests run in GitHub Actions on every commit
Our API integration process
We follow a four-phase process that delivers a production-ready integration in 8-12 weeks.
Each phase has clear deliverables and a fixed price. You know exactly what you get and when you get it.
We start with a 2-week discovery to map endpoints and data models, then design the architecture, build and test, and finally deploy with CI/CD.
What ships with every API integration
Every project includes these deliverables so your team can operate independently.
- Source code in your private GitHub repo
- CI/CD pipeline with GitHub Actions
- API documentation in OpenAPI 3.0 format
- Error tracking with Sentry
- Monitoring dashboard in Datadog
- Unit and integration tests (80%+ coverage)
- Deployment scripts for AWS or your cloud
- Rate limiting and caching configuration
- Webhook retry logic with dead-letter queue
- Security audit report covering OWASP top 10
What we ship in this practice.
Stripe payment integration for a subscription SaaS
Built a custom Stripe integration that syncs subscription data to a PostgreSQL database and triggers Slack notifications on failed payments. Reduced manual billing errors by 15 hours per month. Tech stack: Node.js, Express, Stripe API, PostgreSQL, Slack API.
Salesforce to HubSpot data sync
Developed a bidirectional sync between Salesforce and HubSpot using webhooks and scheduled jobs. Handles field mapping, deduplication, and conflict resolution. Eliminated 20 hours/week of manual data entry. Tech stack: Python, Celery, Salesforce REST API, HubSpot API, Redis.
Real-time inventory sync for ecommerce
Connected Shopify, Amazon, and a warehouse WMS via a real-time API. Inventory updates propagate in under 2 seconds. Reduced overselling by 99%. Tech stack: Node.js, WebSocket, Redis, Shopify API, Amazon SP-API, custom WMS API.
Plaid banking API for fintech app
Integrated Plaid Link and Transactions API to pull bank account data for a personal finance app. Handles OAuth, token refresh, and error recovery. Achieved 99.95% uptime for data sync. Tech stack: Python FastAPI, Plaid API, PostgreSQL, AWS Lambda.
Shipping API integration for logistics platform
Built a unified shipping API that aggregates rates from UPS, FedEx, and USPS. Returns cheapest option in under 500ms. Saved client 30% on shipping costs. Tech stack: Node.js, Express, Redis caching, UPS API, FedEx API, USPS API.
EHR integration for telehealth app
Connected a telehealth platform with Epic EHR to pull patient demographics and push visit notes. Compliant with HIPAA and uses SMART on FHIR. Reduced documentation time by 8 hours per clinician per week. Tech stack: Python, FHIR API, Epic EHR, AWS HIPAA-eligible environment.
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 averages 8+ years of experience. Every engineer has shipped at least 10 production API integrations before joining IRPR.
SOC 2 and HIPAA compliance
We follow SOC 2 Type II controls and HIPAA security rules. Our infrastructure is audited annually and we sign BAAs for healthcare projects.
200+ integrations shipped
We have built over 200 custom API integrations across ecommerce, fintech, healthcare, and SaaS. Each one is documented and monitored.
98% on-time delivery
We track every project with a public milestone board. 98% of our integrations ship within the agreed timeline.
Full code ownership
You own all source code, documentation, and deployment scripts. No lock-in, no license fees, no hidden costs.
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.