Here's a simpler answer for the ASP.NET Core Web Api/Swashbuckle combo, that doesn't require you to register any custom filters. Third time's a charm you know :).
Adding the code below to your Swagger config will cause the Authorize button to appear, allowing you to enter a bearer token to be sent for all requests. Don't forget to enter this token as Bearer <your token here> when asked.
Note that the code below will send the token for any and all requests and operations, which may or may not be what you want.
services.AddSwaggerGen(c =>
{
//...
c.AddSecurityDefinition("Bearer", new ApiKeyScheme()
{
Description = "JWT Authorization header using the Bearer scheme. Example: \"Authorization: Bearer {token}\"",
Name = "Authorization",
In = "header",
Type = "apiKey"
});
c.AddSecurityRequirement(new Dictionary<string, IEnumerable<string>>
{
{ "Bearer", new string[] { } }
});
//...
}
Via this thread.