I will build or integrate a rest API using c sharp and aspnet core

Need a REST API built, integrated, or fixed in your .NET application?

I specialize in C#, ASP.NET Core, REST APIs, Web APIs, and third-party system integrations. Whether you need a new API developed or an existing application connected to an external service, I can help build a clean and reliable solution.

I can help with:

• ASP.NET Core Web API development
• REST API development
• Third-party API integrations
• GET, POST, PUT, PATCH and DELETE endpoints
• OAuth and token-based authentication
• Bearer tokens and API keys
• JSON request and response handling
• API models and DTOs
• SQL/database integration
• Error handling and logging
• 400, 401, 403, 404, 405 and 500 errors
• Existing API troubleshooting
• Swagger / OpenAPI
• Legacy API modernization

I can work with an existing application or develop new API functionality for your project.

Please contact me before ordering larger integrations. API projects vary significantly depending on authentication, documentation, number of endpoints, business logic and third-party requirements.

Larger integrations and ongoing development are available through custom offers.