您可以使用预序列化过滤器操作Open API文档。
您可以将“开放式API路径”复制到具有新密钥/路径的新（临时）集合，清除原始集合，然后将新集合复制回以替换它：

app.UseSwagger(options =>
{
    options.PreSerializeFilters.Add((openApiDocument, httpRequest) =>
    {
        OpenApiPaths tempOpenApiPaths = new OpenApiPaths();
        foreach (KeyValuePair<string, OpenApiPathItem> openApiPath in openApiDocument.Paths)
        {
            tempOpenApiPaths.Add("/foo" + openApiPath.Key, openApiPath.Value);
        }

        openApiDocument.Paths.Clear();
        foreach (KeyValuePair<string, OpenApiPathItem> openApiPath in tempOpenApiPaths)
        {
            openApiDocument.Paths.Add(openApiPath.Key, openApiPath.Value);
        }
    });
});