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Update and Fix API Integration in JavaScript Code

$30
1
Delivery in
4 days
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What you get with this Offer

Are you facing issues with outdated or broken API integrations in your JavaScript application?

I will professionally update, fix and optimize your API connections in JavaScript code, ensuring smooth data flow and reliable functionality.

I have experience with REST APIs, SOAP, GraphQL and WebSocket integrations and can quickly update endpoints, handle authentication and ensure error-free communication between your app and third-party services.

What’s Included in This Offer

✅ Update existing API calls in your JavaScript code
✅ Replace deprecated API endpoints with the latest versions
✅ Fix bugs in API response handling & authentication
✅ Optimize fetch/axios code for better performance
✅ Error handling, logging, and testing of integrations
✅ Documentation of changes made

Why Choose Me?

✅ Skilled in JavaScript, Node.js, React, and API integrations
✅ Hands-on experience with REST, GraphQL, and WebSockets
✅ Familiar with authentication (OAuth, JWT, API keys)
✅ Proven record of debugging and updating live applications
✅ Clear communication & fast turnaround

Get more with Offer Add-ons

  • I can fully test the package unit testing & API monitoring setup

    Additional 1 working day

    +$34
  • I can deliver all work in 1 working day
    +$67

What the Freelancer needs to start the work

What I Need from Buyer to Get Started:

✅ Source code access (GitHub, GitLab, or zip file)
✅ Details of APIs to be updated (documentation or endpoint list)
✅ Any authentication credentials (API keys, tokens, test accounts)
✅ Hosting/server access (if deployment is required)
✅ Specific requirements for edits or new functionality