The main objectives of this article are: Implement HTTP Post Endpoint. In Blazor WebAssembly Create A Form Implement Insert Logic In Service Files In API Project: Let's add a method definition like 'CreateSuperHeroesAsync()' in 'ISuperHeroesService.cs' API_Project/Services/ISuperHeroesService.cs: Task<SuperHeroes> CreateSuperHeroesAsync(SuperHeroes newSuperHeroes); Let's implement the 'CreateSuperHeroesAsync()' in 'SuperHeroesService.cs' API_Project/Services/SuperHeroesService.cs: public async Task<SuperHeroes> CreateSuperHeroesAsync(SuperHeroes newSuperHeroes) { _myWorldDbContext.SuperHeroes.Add(newSuperHeroes); await _myWorldDbContext.SaveChangesAsync(); return newSuperHeroes; } Here we save the new item into the database. Create HTTP Post Endpoint In API Project: Let's add a new action method i.e HTTP Post endpoint in our 'SuperHeroesController.cs' API_Project/Controllers/SuperHeroesController.cs: [HttpPos