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English
$
USD
I will integrate rest API, stripe,wordpress API, webhooks, and API development
Daniel Muller
About this gig
Need a reliable developer to integrate or fix your REST API, Stripe, WordPress API, webhooks, or a third-party API? You're in the right place.
I provide professional API integration and custom API development to connect your website, application, or business systems securely and efficiently. Whether you need a payment gateway, REST API, JSON/XML API, webhook, authentication, or API debugging, I'll deliver a clean, scalable solution tailored to your requirements.
My services include:
- REST API Integration
- Stripe & Payment Gateway Integration
- WordPress & WooCommerce API
- Third-Party API Integration
- Webhook Setup & Troubleshooting
- Custom API Development
- OAuth & JWT Authentication
- JSON, XML & SOAP API Integration
- API Testing & Bug Fixing
- Data Synchronization & Automation
Why choose me?
- Clean, secure, and maintainable code
- Thorough testing before delivery
- Clear communication and on-time delivery
- Source code included
- Ongoing support when needed
Not sure which package fits? Send me a message, and I'll recommend the best option.
Get to know Daniel Muller
Daniel Muller
Expert iOS and Android Mobile App Developer
- FromGermany
- Member sinceApr 2026
- Avg. response time1 hour
Languages
English, German, Italian, Arabic, Dutch, Spanish
Looking for a reliable Mobile App Developer? I specialize in building high-quality, scalable iOS and Android applications using Swift, Objective-C, and modern mobile development technologies. My expertise includes custom mobile app development, API integration, JSON, bug fixing, app optimization, and performance improvements. I deliver clean, efficient code, clear communication, and on-time results. Whether you need a new app, feature updates, or bug fixes, I'm committed to providing solutions that help your business grow.
My Portfolio
Other Software Development Services I Offer
FAQ
What APIs can you integrate?
What APIs can you integrate?
Can you fix an existing API integration or API errors?
Absolutely. I can troubleshoot API bugs, authentication issues, webhook failures, timeout errors, JSON/XML formatting issues, and API response problems.
Can you develop a custom API from scratch?
Yes. I provide custom API development for web applications, mobile apps, SaaS platforms, and business systems using secure and scalable development practices.
Do you support API authentication?
Yes. I can implement OAuth, OAuth2, JWT, API Keys, Bearer Tokens, Basic Authentication, and other secure authentication methods required by your API.
Which programming languages and frameworks do you work with?
I work with PHP, Laravel, WordPress, Node.js, JavaScript, Python, React, Next.js, and other technologies required for REST API integration and backend development.
Can you integrate payment gateways like Stripe or PayPal?
Yes. I can integrate Stripe, PayPal, payment gateway APIs, subscription billing, checkout systems, webhooks, and payment processing into your website or application.
Do you provide API testing before delivery?
Yes. Every API integration is tested before delivery using professional tools such as Postman to ensure secure communication, proper data exchange, and reliable performance.
Can you integrate APIs with WordPress or WooCommerce?
Yes. I can integrate custom APIs into WordPress and WooCommerce, including product synchronization, order management, customer data, inventory updates, and third-party services.
What information do you need to get started?
Please provide your API documentation, API credentials or access keys, project requirements, website or application details, and any workflow or integration goals you have.
What if my project is more complex than your packages?
No problem. If your project involves multiple API integrations, workflow automation, custom business logic, CRM or ERP integration, or advanced API development, please contact me before ordering so I can recommend the best solution.
