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English
$
USD
I will integrate rest apis and troubleshoot API errors
Abdul Rafay
About this gig
Stuck on a REST API error, a broken authentication flow, or a Postman request that won't return the right response?
I integrate, troubleshoot, and test REST APIs for web apps, backends, and business systems whether you need a new integration built or an existing one fixed.
I can help with:
- REST API integration with external services
- Authentication issues (OAuth, Bearer tokens, expired/invalid credentials)
- API errors: 400, 401, 403, 404, 500
- JSON request/response handling
- Postman testing and collection setup
- CRM, subscription, and data-API integrations
- Headers, parameters, and request configuration
- JavaScript fetch()/API calls
I focus on finding the actual root cause rather than just patching symptoms, and I'll explain what was wrong in plain language along with the fix.
Have a more unusual or complex setup? Message me first with the details so we can confirm scope together before you order.
Get to know Abdul Rafay
Abdul Rafay
I am a frontend developer who builds responsive user friendly web apps
- FromPakistan
- Member sinceOct 2017
- Avg. response time1 hour
Languages
English, Urdu, Hindi
Expert Web 2.0 & Web 3.0 Developer with 3+ Years of Experience
Hi, I’m Abdul Rafay, a skilled developer specializing in Web 2.0 and Web 3.0. I create responsive websites using HTML, CSS, JavaScript, React, Nextjs, and Tailwind CSS. I also excel in blockchain projects like NFT minting dApps, tokenization, and smart contracts. With a personalized approach, attention to detail, and timely delivery, I ensure high-quality results tailored to your needs.
Let’s work together to bring your ideas to life. Contact me today!
FAQ
What type of APIs can you work with?
I can work with REST APIs that provide standard HTTP/JSON interfaces, including custom business APIs and third-party APIs.
Can you fix API errors?
Yes. I can troubleshoot common API errors such as 400, 401, 403, 404, and 500, as well as authentication, headers, parameters, and response issues.
Can you test my API using Postman?
Yes. I can create and test API requests in Postman and help identify request, authentication, or response problems.
Can you integrate an API into my JavaScript application?
Yes. I can integrate REST APIs into existing JavaScript applications using API requests such as fetch().
Do you work with authentication APIs?
Yes. I can troubleshoot and configure common authentication methods such as Bearer tokens and API keys, depending on the API requirements.
