An SEO api is important when you need data provided by third party servers so that you can complete your SEO analysis and performance tracking without much hassle. From information on a particular keyword that you are trying to rank for to tracking your keyword’s SERP, everything requires access to a range of different tools provided by third party developers.
But when you have access to an seo api, you simply combine all the important tools and manage to use as and when required with the help of an api. With the help of an API you can easily check rankings of your keywords which would allow you to get a better idea on how much more effort you have to put in for it to rank at a position that you would be satisfied with.
There is quite a bit of information that you would want when working on a specific keyword or sets of keywords and this will include keyword difficulty for which you will want to compare your website with those of your competitors who may be working towards ranking for the same set of keywords as yourself.
With the help of an SEO API you will be able to get all sets of data that would be relevant to your requirement which should enable you to work on your SEO task immediately.