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Fiverr Pro
English
$
USD
I will fix rest API, webhook, authentication and integration errors
Mable Tech
About this gig
The integration that worked yesterday is throwing errors today? Every hour it stays broken costs you customers.
I debug and repair REST APIs, webhooks and authentication flows. Whether it is a 401 token failure, a CORS block, a webhook that never fires, a 500 response or systems that stopped syncing, I trace the root cause and fix it properly.
What I fix:
- 400, 401, 403, 404 and 500 API errors
- Webhooks that never fire or fire twice
- OAuth, token and API key authentication fails
- CORS blocks and connection timeout
- Data sync failures between third-party systems
- Broken Stripe, Shopify and WhatsApp integrations
Every fix ends with live testing and a plain-English note on what broke and why, so the error does not return.
Process: you share the error and access, I diagnose, then I fix, test and confirm with you live.
Honest timelines and clear updates. If the root cause sits with a third-party provider, I will tell you where and why.
Send me the error logs and let's fix it.
Get to know Mable Tech
Mable Tech
API Integration and Automation Developer
- FromNigeria
- Member sinceSep 2026
- Avg. response time1 hour
Languages
English, German, French
I’m Mable Tech, a developer focused on API integration and backend solutions. I help businesses and developers connect applications and third-party services through reliable API integrations and REST APIs.
My services include custom PHP API integration, REST API integration, API troubleshooting, and backend system connections. I focus on understanding your existing setup, identifying integration issues, and building practical solutions.
Need an API integrated or an existing REST API fixed? Send me the details and let’s discuss your project.
Other Software Development Services I Offer
FAQ
How fast can you start on a broken integration?
Urgent errors are prioritized. Message me before ordering with the error and I will confirm scope the same day. Basic orders start immediately and most single-error fixes are delivered inside the stated 2-day window.
What if the bug is on the third-party provider's side (Stripe, Shopify, Meta)?
I diagnose to the exact boundary and show you proof of where the failure sits. If the provider must act, you get a precise ticket-ready explanation and recommended fix, and we pause or refund the unused portion of the order.
Do you need my API keys and server credentials?
Usually yes, scoped strictly to the task. Share keys with least privilege and rotate them after the order. I never store credentials after delivery, and I explain exactly which access each fix requires before you grant it.
Can you fix code written by another developer?
Yes. Most of my work is repairing integrations I did not originally build. I read the existing code, trace the failure and fix it with minimal disruption. Premium adds detailed comments so your team understands every change.
What if the same error returns after delivery?
Every fix is verified with live tests before delivery. If the identical error returns within your revision window, I re-investigate at no extra cost. Premium includes 7 days of post-delivery support for exactly this scenario.
