# Byggradarn
> The platform that watches incoming documents about construction and procurement in
> Swedish municipalities, extracts named datapoints, and tells subscribers when one
> changes. Apps are built on its REST API.
## API
- [The Byggradarn API](/developers/api.md): authentication, every endpoint, request
  and response shapes, errors, limits, and a worked example. Binding on the code.
- [Endpoints](/developers/endpoints): every route as the platform maps it, grouped by
  scope, with a link into the document — read from the code, not written by hand.
## Design
- [Byggradarn design guidelines](/developers/design-guidelines.md): the stylesheet,
  every token, every component with its markup, and the rules for copy — enough to
  build a screen that reads as part of the product.