# Milkweed USA open data API

Everything on this site as JSON, CC BY 4.0. No key, no signup, no rate limit: these are static files on a CDN.

## Endpoints

- https://milkweedusa.com/api/index.json – service description and license
- https://milkweedusa.com/api/species.json – all 79 species
- https://milkweedusa.com/api/states.json – 51 states with species lists and climate normals
- https://milkweedusa.com/api/counties.json – county-level distribution, FIPS coded
- https://milkweedusa.com/api/climate.json – NOAA statewide monthly normals, 1991-2020
- https://milkweedusa.com/api/suppliers.json – 86 nurseries, seed houses and state societies
- https://milkweedusa.com/api/wildlife.json – 16 animals that use milkweed
- https://milkweedusa.com/api/population.json – both monarch overwintering counts

## Rate limits

There are none. The API is static files on a CDN with no server behind it, so there is nothing to overload. Files are served with Cache-Control: public, max-age=3600; respecting that is appreciated.

## Attribution

Milkweed USA (https://milkweedusa.com), CC BY 4.0. Photographs carry their own licenses and are credited per image.

---
Source: https://milkweedusa.com/api/ – Milkweed USA, CC BY 4.0.