API Integration Services
API Integration Services
We connect your systems through REST, SOAP, GraphQL, OAuth2, and webhooks. From simple third-party connections to complex enterprise integration pipelines, we build integrations that run reliably without constant maintenance.
8+
Years
150+
Projects Delivered
10+
Industries
24h
Response Time
What We Deliver
Our Capabilities
REST API Integration
Production-grade REST integrations with proper rate limiting, exponential backoff, token caching, pagination handling, and schema change isolation. Built to run unattended for months.
SOAP & Legacy API Integration
WSDL parsing, WS-Security (UsernameToken, X.509 certificate signing, SAML), SOAP Fault handling, and XML schema validation for legacy enterprise and government APIs.
OAuth2 & OpenID Connect
Authorization code with PKCE, client credentials, refresh token rotation, token validation, and OIDC identity claims. Implemented correctly from the start, not patched after a security incident.
Webhook Systems
Inbound webhook receivers with signature verification, idempotent processing, retry handling, and delivery guarantees. Outbound webhook dispatchers with queue-based delivery and failure recovery.
Real-Time Data Sync
Event-driven integration patterns using message queues and service buses. Data stays consistent across systems without polling loops or fragile scheduled jobs.
ETL & Data Pipelines
Extract, transform, and load pipelines that move data between databases, APIs, and file systems. Handling format conversion, validation, deduplication, and error logging at each stage.
Tech Stack
Technologies We Use
Why FriendsBit
What Sets Us Apart
We have delivered API integrations for clients in healthcare, enterprise, government (UN-DGACM), and SaaS. We understand the real-world edge cases that tutorial implementations miss.
Every integration ships with retry logic, structured error logging, and monitoring hooks. When something fails in production, you know immediately and the system recovers automatically.
We handle auth token lifecycle correctly. Token refresh races, WS-Security certificate signing, Google OAuth2 redirect URI mismatches — we have debugged all of them in production.
Integrations are isolated behind adapter layers. When the third-party API changes its schema, you update one file, not the whole codebase.
Real Work
From Our Portfolio
REST API Integration for Enterprise Projects: A Practical Guide
Enterprise
Clients Served
SOAP API Integration: What It Takes and When You Need a Specialist
OAuth2 and OpenID Connect: How to Implement Authentication the Right Way
Debugging a Broken Google OAuth2 Integration for a Mental Healthcare Provider
3 Hours
Time to Fix
Common Questions
Frequently Asked Questions
What is the difference between REST and SOAP API integration?
REST APIs use HTTP and return JSON or XML, making them lightweight and well-suited for web and mobile applications. SOAP is a protocol with a strict XML message format and built-in standards for security (WS-Security), transactions, and reliability. SOAP is common in enterprise and government systems where those guarantees matter. We handle both.
How long does an API integration project take?
A straightforward REST integration with authentication and basic data sync typically takes 1-3 weeks. A complex enterprise integration involving SOAP, WS-Security, message queuing, and bidirectional sync can take 4-8 weeks. We scope this accurately before work begins.
Can you integrate with legacy or on-premise systems?
Yes. We have experience with WCF, SOAP, and legacy enterprise APIs. We use adapter layers to isolate your core application from the legacy system, so when the external interface changes, the impact is contained.
How do you handle API failures and downtime?
Every integration we build includes retry logic with exponential backoff, structured error logging, and alerting. If the third-party API goes down, the system queues requests and retries automatically. You get notified, but it does not require manual intervention.
Do you work on existing integrations that need fixing?
Yes. We regularly take over broken or fragile integrations, diagnose the root cause, and rebuild them correctly. We have fixed broken OAuth2 flows, SOAP certificate signing issues, and race conditions in token refresh logic.