I will develop fix integrate any API and connect your app with apis


About this gig
Need to develop an API, fix a broken integration, or connect a third-party service to your application?
Youre in the right place.
I specialize in API development, integration, debugging, troubleshooting, and optimization for mobile apps, SaaS platforms, web applications, and backend systems.
WHAT I CAN DO:
- Custom REST API development
- Third-party API integration
- Fix API errors & connection issues
- Connect mobile/web apps to APIs
- Authentication & authorization setup
- Payment gateway integration
- AI & OpenAI API integration
- Google, Firebase & social APIs
- Webhooks & automation
- JSON data handling
- API documentation
- Database & backend integration
- API testing & debugging
- Optimize slow API performance
- Fix unstable integrations
Whether your API is returning errors, authentication is failing, or data is not syncing correctly, I can quickly identify the root cause and deliver a stable solution.
I can work with your existing codebase or build from scratch based on your needsideal for MVPs or production systems.
My goal is to ensure your systems communicate securely, reliably, and efficiently with clean, scalable implementation.
Please send API docs, error logs, or project details.
Get to know Willcedrix
Power Apps Developer
- FromUnited Kingdom
- Member sinceJun 2026
- Avg. response time1 hour
Languages
Spanish, English, Italian
Other Software Development Services I Offer
FAQ
Can you fix an API that is already broken?
Yes. I can investigate errors, authentication issues, failed requests, incorrect responses and connection problems.
Can you integrate any third party API?
Yes, provided the API has accessible documentation and credentials where required.
Can you develop a custom REST API?
Yes. I can develop custom APIs for applications, SaaS products, mobile apps and backend systems.
Can you integrate payment APIs?
Yes. I can integrate supported payment services and connect them with your application or backend
Can you integrate AI APIs?
Yes. I can integrate AI services into applications and connect them to your existing backend or frontend.
Can you work with my existing code?
Yes. I can inspect your existing implementation, identify the problem and integrate or modify the API without unnecessarily rebuilding your project.

