# NEMAR

> The Neuroelectromagnetic Data Archive and Tools Resource (NEMAR) is a
> catalog and browser for neuroimaging datasets (EEG, MEG, iEEG, EMG, and
> more) in BIDS format. Dataset bytes are not hosted on nemar.org --
> they are served from data.nemar.org, described below.

## Data

- [data.nemar.org](https://data.nemar.org/): BIDS-shaped file access over HTTPS. A dataset's current release is served under `/<id>/latest/`; earlier releases are under `/<id>/v<version>/` (for example `v2.0.0` -- the `v` prefix is required, the bare semver 404s).

## API

- [api.nemar.org/datasets](https://api.nemar.org/datasets): paginated dataset catalog, JSON.
- [api.nemar.org/datasets/search?q=EEG](https://api.nemar.org/datasets/search?q=EEG): full-text and faceted dataset search, JSON. The `q` query parameter is required; a bare GET with no `q` returns 400.

## Docs

- [For agents](https://docs.nemar.org/platform/for-agents/): the data.nemar.org layout, API examples with curl, the CLI, and when to stream via Zarr instead of downloading.
- [Zarr contract](https://docs.nemar.org/platform/zarr/): the zarr.nemar.org index.json contract for streaming a single recording without a full download.

## Datasets

- `https://nemar.org/dataset/<id>`: server-rendered dataset page with a schema.org Dataset JSON-LD block in the page head; a markdown mirror is served at `/dataset/<id>.md`.

## License

Dataset licenses vary per dataset. Most are CC0 or CC-BY; a minority carry a non-commercial or no-derivatives term (for example CC-BY-NC-SA). Check each dataset's own license before reuse -- it is not the same across NEMAR.