Add README to API directory

Author: andybywire

api/README.md

@@ -0,0 +1,11 @@
+# UX Methods API
+Where possible, UX Methods relies on ready-made micro-services and APIs for its core functionality. Occasionally, however, situations arise where it's easier to write a script to do one thing particularly well than to try to cobble together a bunch of services to do something none of them really want to do. That's what this part of the project is for. 
+
+## Linked Data Fetch
+In addition to information on individual methods and disciplines, UX Methods also collects links to resources from all over the web that add detail, nuance, and examples to particular techniques and approaches. In order to give these links useful context and help site visitors understand what's behind them, UX Methods collects and displays metadata about each link including the author, publication, a short description, and an image. 
+
+Finding and copying all this data, however, is a pain -- especially if one is adding a lot of links in a single sessions. Since most articles online these days also include linked data markup with this content, this is also a job that _computers_ should be doing (not content contributors).
+
+The "LD" endpoint takes the URL of a resource that has been entered in the editor, grabs linked data from the target site using the [metascraper](https://www.npmjs.com/package/metascraper) library, then uploads what metadata it finds to the resource in question via the [Sanity http api](https://www.sanity.io/docs/http-api). Images are likewise uploaded via [Sanity's Assets API](https://www.sanity.io/docs/http-api-assets). 
+
+![Linked Data upload gif](https://user-images.githubusercontent.com/3710835/156894260-07972db3-8fa7-4ff9-9d4b-c916c4a7a9ca.gif)