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Fiverr Pro
English
$
USD
I will develop rest API, integrate third party API, fix API errors and webhooks
Frank
About this gig
Are you struggling with API integration, authentication errors, failed webhooks, broken endpoints, or third party APIs that simply won't work? You're in the right place.
I help businesses, startups, and developers build, integrate, troubleshoot, and optimize secure REST APIs that save time, improve performance, and keep applications running smoothly. Whether you need a custom REST API, FastAPI backend, third party API integration, payment gateway integration, OAuth/JWT authentication, webhook setup, or API bug fixing, I'll deliver a clean, scalable, and reliable solution tailored to your project.
My goal is not just to complete a task but to solve the technical problems slowing down your business. You can expect clean code, secure implementation, clear communication, on-time delivery, and dedicated support throughout the project.
Let's build or fix your API the right way. Send me a message before ordering to discuss your requirements and choose the best solution for your project.
Get to know Frank
Frank
API Integration and Backend Developer
- FromUnited States
- Member sinceJun 2026
- Avg. response time1 hour
Languages
English, French, Spanish
Is your API failing, returning errors, or refusing to connect with your application? Need to integrate payment, AI, CRM, or other third party APIs without wasting time? I help businesses build, fix, and integrate secure, reliable APIs that work exactly as expected. Whether you need custom REST APIs, backend development, authentication, or API troubleshooting, I'll deliver clean, scalable solutions that save you time and keep your business running smoothly.
My Portfolio
FAQ
What API services do you offer?
I develop custom REST APIs, integrate third-party APIs, fix API errors, configure webhooks, implement OAuth/JWT authentication, and troubleshoot existing API integrations.
My API is returning errors. Can you fix it?
Yes. I can identify and resolve issues such as authentication failures, broken endpoints, webhook problems, timeout errors, invalid responses, and integration bugs.
Can you integrate any third party API into my website or application?
Yes. I can integrate payment gateways, AI APIs, CRM systems, messaging APIs, cloud services, and many other third party APIs based on your project requirements.
What information do you need to get started?
Please provide your project details, API documentation, source code or repository (if available), server or hosting access (if required), and any API keys or credentials needed for the integration.
Do I need to provide API keys or access credentials?
Yes. If your project requires authentication, you'll need to provide the necessary API keys, tokens, or temporary access. Your information will only be used for your project.
Can you work with an existing project or codebase?
Absolutely. I can work on existing applications, improve API performance, fix integration issues, or add new API functionality without rebuilding your project from scratch.
Will my API integration be secure?
Yes. I follow secure development practices, including proper authentication, input validation, and reliable API communication to help protect your application.
What if I'm not sure which package to choose?
No problem. Send me a message with your project details before ordering, and I'll recommend the most suitable package based on your requirements.
Do you test the API before delivery?
Yes. Every API or integration is tested to ensure it functions correctly, returns the expected responses, and meets your project requirements before delivery.
What if my project has custom requirements?
Every project is different. If your requirements aren't covered by my packages, contact me before placing an order. I'll review your needs and create a custom offer that fits your project.
