I will fix API errors, broken integrations, authentication and API bugs

A
anthonydrill258
A
anthonydrill258
Anthony D.
fix API errors, broken integrations, authentication and API bugs
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fix API errors, broken integrations, authentication and API bugs

About this gig

Is your API returning errors, failing requests, or suddenly refusing to work? I can help.


I will troubleshoot and fix API integration problems affecting your website, application, SaaS, CRM, eCommerce store, or backend system.


I can work with REST APIs, JSON, OAuth, API keys, JWT, HTTP requests, third-party APIs, authentication, webhooks, and backend integrations.


What I can fix:

  • API errors and failed requests
  • Authentication & authorization issues
  • API key/token problems
  • REST API integration bugs
  • JSON/request/response errors
  • Third-party API connection issues
  • Data mapping problems
  • API timeout and request issues


Send me your API documentation, error message, and current setup, and I'll diagnose the problem and provide a reliable fix.

  • Expertise

    • Algorithms & Data structures
    • Debugging
    • Localization
    • Performance
    • Security

  • Programming language

    • JavaScript

  • Frontend framework

    • Angular
    • AngularJS
    • Backbone.js
    • Next.js
    • Tailwind CSS

  • Backend framework

    • Django
    • Laravel
    • CakePHP
    • CodeIgniter
    • FastAPI

Get to know Anthony D.

Anthony D.

Amazon Seller API Specialist, Integration, Sync and Workflow Automation

  • FromUnited States
  • Member sinceJun 2026
  • Avg. response time6 hours

  • Languages

    English
Need a reliable Amazon SP-API expert? You're in the right place. I specialize in Amazon Seller Partner API (SP-API) integrations, helping businesses automate inventory management, order processing, product listings, reporting, and data synchronization. Whether you need Amazon connected to Shopify, WooCommerce, ERP, CRM, or a custom application, I deliver secure, scalable, and efficient solutions tailored to your business needs. Let's streamline your operations, reduce manual work, and improve productivity with a powerful Amazon API integration.

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