# Ostrov retreat center

> Public retreat information, calendars and preliminary accommodation quotes for Ostrov in Karelia.

- name: center.ostrov/public-api
- version: 0.2.0
- connection class: R0 (autonomous)
- trust: 96/100
- quality: 91/100 (strong)
- owner: not claimed
- descriptor: https://api.protogrid.dev/v1/servers/center.ostrov%2Fpublic-api
- tools: https://api.protogrid.dev/v1/servers/center.ostrov%2Fpublic-api/tools

**An agent can connect right now, no human step.** Remote endpoint, no authentication, reachable on the last probe.

## Connection (mcpServers)

```json
{
  "mcpServers": {
    "public-api": {
      "type": "http",
      "url": "https://ostrov.center/api/public/v1/mcp"
    }
  }
}
```


## Trust

- hygiene: 100
- liveness: 100
- freshness: 100
- provenance: 85
- drivers: +repository +dns-namespace +website +reachable +uptime-100% +updated-9d-ago
- Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed.

## Quality 91/100 (strong)

### protocol: 75 (weight 25)

- warn `protocol.modern`: newest supported version is 2025-11-25; 2026-07-28 not supported, older versions are deprecated until 2027-07-28
- n/a `protocol.stateless`: only applies to 2026-07-28 servers
- pass `protocol.transport`: streamable HTTP
- n/a `protocol.list_ttl`: only applies to 2026-07-28 servers

### authorization: n/a (weight 15)

- n/a `auth.prm`, `auth.as_metadata`, `auth.cimd`: no remote uses OAuth
- n/a `auth.secret_in_url`: no templated URL

### tool hygiene: 100 (weight 30)

- pass `tools.descriptions`: every tool has a description
- pass `tools.description_length`: descriptions are concise
- pass `tools.schemas`: every tool has an object input schema
- pass `tools.annotations`: 7 of 7 tools declare readOnlyHint or destructiveHint
- pass `tools.directory_hints`: every tool declares readOnlyHint, destructiveHint, idempotentHint and openWorldHint
- pass `tools.token_cost`: about 1,925 tokens to load every tool
- pass `tools.api_dump`: tools are not a one-to-one API dump

### stability: 100 (weight 15)

- pass `stability.changes`: no tool changes in 30 days
- pass `stability.rug_pull`: no tool changed its meaning under the same name

### dependencies: n/a (weight 15)

- n/a `deps.known_vulns`, `deps.mcp_sdk_version`, `deps.resolvable`: no npm or PyPI package

- tools: 7, about 1,925 tokens to load them all
- tool set hash: 80baababc30a650bf8471584a4d85a89
- badge: [![protogrid quality](https://protogrid.dev/badge/center.ostrov/public-api.svg)](https://protogrid.dev/servers/center.ostrov/public-api)
- Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed.

### Tool changes

_No tool definition changes recorded._

## Remotes

- https://ostrov.center/api/public/v1/mcp (streamable-http, auth none, reachable true, uptime30d 1)

## Packages

_none_

## Tools (7)

- `calculate_quote`: Calculate without saving or contacting anyone. Check complete, warnings and availabilityStatus.
- `get_calendar`: Confirmed public activity; empty dates do not mean availability.
- `get_catalog`: Current tariff version, resources and rules. Do not cache prices as permanent knowledge.
- `get_center`: Public location and contact information.
- `get_events`: Public programs and labeled demo data; contact the organizer to ask about joining.
- `get_objects`: Current public resource descriptions and availability rules; no guarantee of open places.
- `suggest_group`: Suggest room/program selection for the ordinary group tariff; not an availability check.