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Third-Party API Integration

Stripe, Shopify, SendGrid, Twilio, OpenAI, Gemini. Webhooks, OAuth, API security.

Author: Paweł Wiszniewski · Updated:

Key takeaways

Stripe, Shopify, SendGrid, Twilio, OpenAI, Gemini. Webhooks, OAuth, API security.

  • ›Secure integration with proper error handling and retry logic.
  • ›Webhook setup with verification, rate limiting, and idempotency keys.
  • ›OAuth/JWT authentication flows for delegated access.

Price: from €1,500 / integration

SERVICE DETAILS

I integrate popular services and APIs with proper OAuth flows, API key rotation, webhook validation, and edge-case error handling. I build proper abstractions so you can switch providers later without refactoring code.

› INVESTMENT:

from €1,500 / integration
const module = new ExecutionProtocol();

// Initializing third-party-api-integration...
› Loading dependencies... OK
› Establishing connection... OK
› Ready for deployment... AWAITING_COMMAND

Who this is for

  • Companies moving data by hand between their store, payments, CRM and accounting.
  • SaaS products adding payments, SMS, email or AI features.
  • Teams whose integrations “sometimes break” with no one knowing why.
  • Businesses migrating to a new payment provider or commerce platform.

What you get

  • Process and API documentation analysis plus a data flow design.
  • Integration with OAuth, signature-verified webhooks and idempotency.
  • Retry logic, queues and alerts so failures never disappear silently.
  • Secure storage of keys and secrets.
  • Sandbox testing and documentation for your team.

How results are measured

  • Failed syncs and how quickly they're detected.
  • Hours of manual data entry saved.
  • Share of webhooks processed successfully.
  • Response time when a third-party provider goes down.

Key Benefits

Secure integration with proper error handling and retry logic.

Webhook setup with verification, rate limiting, and idempotency keys.

OAuth/JWT authentication flows for delegated access.

Provider abstraction—switch providers without breaking client code.

Monitoring & alerting on API failures.

The Process

1

API Documentation Review

Study API docs, auth flows, and rate limits.

2

Integration Implementation

Code SDK wrapper with proper error handling.

3

Webhook Setup

Configure webhooks with verification and event processing.

4

Testing & Monitoring

End-to-end testing and monitoring setup for API health.

Frequently Asked Questions

Do you build custom SDKs?

Sometimes I recommend using official SDKs. Custom wrappers are for custom logic or error handling needs.

What if the third party has an outage?

I implement circuit breaker patterns, fallback logic, and proper monitoring.

How do you handle rate limiting?

I use exponential backoff, request queuing, and caching to avoid hitting rate limits.

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BIAŁYSTOK, PL
+48 732 022 086pawel.wiszniewski95@gmail.com