You can interact with geojson.io programmatically in two ways:
Full API documentation can be found in API.md.
Install browserify'ied libraries:
Browserify libraries, concat other libraries, build minimal d3:
Run a local server with visionmedia/serve:
serve -p 8080
Port 8080 is recommended because by default geojson.io will use a
prose/gatekeeper auth server that redirects
http://localhost:8080/ for GitHub OAuth.
This is made up of small reusable chunks: