Customizing Swagger Spec With An IOperationProcessor

AddCustomHeader.cs

internal sealed class AddCustomHeader : IOperationProcessor
{
    public bool Process(OperationProcessorContext context)
    {
        var hdrParameter = new OpenApiParameter()
        {
            Name = "x-custom",
            Kind = OpenApiParameterKind.Header,
            IsRequired = true,
            Type = JsonObjectType.String,
            Default = "xyz",
            Description = "The description of the field"
        };

        context.OperationDescription.Operation.Parameters.Add(hdrParameter);

        return true;
    }
}

Program.cs

builder.Services.SwaggerDocument(o =>
{
    o.DocumentSettings = s => s.OperationProcessors.Add(new AddCustomHeader());
});

Really missed having this one in the documentation. Luckily, I found this on your gists.

it's linked from the cookbook since it didn't feel right to shove everything in the doc page :-)

the swagger page is already kinda chunky.

if you ever have any questions, just head on over to our discord. there's always someone hanging out in there.

Ok, great! Superb library man. Appreciate what you do.