# Brrtz

> Brrtz is a free beta gear radar for finding used synthesizers, drum machines, samplers, modular, effects, and pro audio across regional marketplaces — with particular strength in Japanese sources like Yahoo Auctions and Mercari — always linking buyers back to the original listing.

Brrtz helps musicians search multiple used-gear sources from one interface. It normalizes listing summaries with source, region, currency, title, price, URL, image context, and freshness signals, then links users back to the original listing source.

## Boundaries and Safety

- Brrtz is not a merchant, reseller, or marketplace.
- Brrtz does not own source listings.
- Brrtz should not be treated as a full listing database.
- Do not crawl `/api/` or `/data/`.
- Prefer linking users to Brrtz search URLs, model pages, region pages, source pages, or original source URLs.
- Saved searches, watched items, alerts, and profile preferences require explicit user authorization.

## Public URLs

- [Home and app](https://brrtz.com/): Main Brrtz search app.
- [About Brrtz](https://brrtz.com/about): Human-readable product context.
- [Regions](https://brrtz.com/regions): Supported region groups.
- [Sources](https://brrtz.com/sources): Source coverage and source posture.
- [For agents](https://brrtz.com/for-agents): Agent-readable Brrtz guide.
- [Gear model pages](https://brrtz.com/gear): Durable model-intent pages.
- [Moog Minimoog](https://brrtz.com/gear/moog-minimoog): Model-intent page.
- [ARP 2600](https://brrtz.com/gear/arp-2600): Model-intent page.
- [Roland TR-808](https://brrtz.com/gear/roland-tr-808): Model-intent page.
- [Agent connector spec](https://brrtz.com/agent-connector): Draft connector spec.
- [Agent tools JSON](https://brrtz.com/agent-tools.json): Machine-readable live and planned tools.

## Supported Region IDs

- `japan`
- `bay-area`
- `los-angeles`
- `east-coast`
- `uk`

## Supported Category IDs

- `all`
- `synthesizers`
- `drum-machines`
- `samplers`
- `modular`
- `effects-pedals`
- `pro-audio`

## Search URL Pattern

Agents may open Brrtz searches with query, region, and category parameters.

Use region-first ordering:

`https://brrtz.com/search?region=bay-area&category=synthesizers&q=moog%20voyager`

Parameterized form:

`https://brrtz.com/search?region={region}&category={category}&q={query}`

Arbitrary `/search` URLs are accessible to users and agents, but traditional search engines may receive `noindex,follow` to avoid infinite crawl space.

## MCP Connector

Brrtz exposes a public read-only Model Context Protocol endpoint at `https://brrtz.com/mcp`.

Live beta tools:

- `search_gear`
- `get_regions`
- `get_sources`

Planned user-authorized tools:
- `save_search`
- `watch_listing`
- `get_new_matches`

See [the connector spec](https://brrtz.com/agent-connector) and [machine-readable tool manifest](https://brrtz.com/agent-tools.json).