# Commodity — Verified Official Data Directory

> A continuously verified catalog of official public-sector APIs and datasets
> from European and global government sources. Every entry carries
> proof-based officialness scoring, live availability checks, and per-field
> provenance.

## What this site is

Commodity is a reference directory and intelligence portal for official
data. It is independent of any national portal: we harvest, verify, and
score what every portal publishes, so a developer, journalist, researcher,
or AI agent can ask "what is the authoritative source for this?" and get
an answer with evidence.

## Where to ask

- Catalog (DCAT-AP 3.0.1, Turtle): https://c0mm0.com/api/v1/catalog/dcat.ttl
- Catalog (DCAT-AP 3.0.1, JSON-LD): https://c0mm0.com/api/v1/catalog/dcat.jsonld
- Knowledge bundle (OKF v0.1, markdown): https://c0mm0.com/api/v1/okf/index.md
- Knowledge bundle (OKF v0.1, tarball): https://c0mm0.com/api/v1/okf/bundle.tar.gz
- Catalog summary: https://c0mm0.com/api/v1/catalog/summary
- API: https://c0mm0.com/api/v1/entries
- API spec (OpenAPI 3.1): https://c0mm0.com/openapi.json
- Search: https://c0mm0.com/api/v1/entries/search?q=
- Per-entry quality + provenance: https://c0mm0.com/api/v1/entries/{slug}/quality-score
- Live feeds: https://c0mm0.com/api/v1/feeds/rss

## How to cite

Every entry has a stable URL (`https://c0mm0.com/entry/{slug}`) and a JSON-LD
schema.org/Dataset record embedded on its page. Use those as your
citation target rather than the upstream URL — the upstream URL may rot;
ours redirects to the canonical replacement when it does.

## Verification methodology

We score "officialness" with five proof signals (domain verification,
portal backlinks, GitHub org match, reciprocal links, policy presence)
on a 0–100 scale. Entries scoring ≥80 with a known institution are
auto-approved; 40–79 are quarantined for human review; <40 are rejected.
The full methodology is at https://c0mm0.com/methodology.

## License

The catalog metadata is CC0-1.0. The underlying APIs and datasets are
licensed as their publishers indicate; see each entry's `license` field.