# Callstay Hotels (remote · callstay.com)

Live hotel rates worldwide: search stays, property detail, all-in room prices, human phone desk.

- Trust score: 71/100 (medium)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-09-28

## Components

- remote · `callstay.com`: 71/100 (this document), [markdown](https://verifymcp.io/servers/com-callstay-hotels/api-mcp.md), [page](https://verifymcp.io/servers/com-callstay-hotels/api-mcp)

## Channel facts

- Endpoint: `https://callstay.com/api/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `0.1.0`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-09-28.

- **Endpoint Security**: 74/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one.
  - HTTPS is enforced; there's no plaintext access path.
  - HSTS check failed: the Strict-Transport-Security header is absent.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 76/100
  - AI-judged instruction clarity (excellent).
  - Context-footprint check failed: tool/resource definitions use about 580 tokens (~145/item across 4 items; 4 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 7/100
  - Stability observed for 2 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 98/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 94% of tool parameters carry a description.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 4 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 5 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 60/100
  - Spec-recency check failed: implements MCP spec 2025-06-18; the latest is 2026-07-28.

## Install

### How do I install the Callstay Hotels MCP server?

Callstay Hotels is a hosted endpoint at https://callstay.com/api/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add --transport http com-callstay-hotels 'https://callstay.com/api/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "com-callstay-hotels": {
      "url": "https://callstay.com/api/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "com-callstay-hotels": {
      "type": "http",
      "url": "https://callstay.com/api/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.com-callstay-hotels]
url = "https://callstay.com/api/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "com-callstay-hotels": {
      "type": "remote",
      "url": "https://callstay.com/api/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add com-callstay-hotels --url 'https://callstay.com/api/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  com-callstay-hotels:
    url: "https://callstay.com/api/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "com-callstay-hotels": {
      "Transport": "http",
      "Url": "https://callstay.com/api/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add com-callstay-hotels -t streamable-http -u 'https://callstay.com/api/mcp'
```

### Other

```json
{
  "mcpServers": {
    "com-callstay-hotels": {
      "type": "http",
      "url": "https://callstay.com/api/mcp"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-09-28 (score 71, +1)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-09-27 (score 70, 0)

- [functional improvement] Stability: unverified → 0.03

### 2026-09-26 (score 70)

First indexed and scored.

## MCP tools (4)

### `capabilities` (~31 tokens)

What Callstay is, which tools exist, what prices mean, and the human desk's phone number. Call first.

### `search_stays` (~220 tokens)

Find hotels for a place, dates and party. Returns up to 48 properties with an indicative nightly and total, rating and a URL that carries the dates.

Input parameters:

- `adults` (integer): Adults across all rooms.
- `checkin` (string): Check-in date, YYYY-MM-DD.
- `checkout` (string): Check-out date, YYYY-MM-DD. Must be after checkin.
- `children_ages` (array): Age of each child at check-in.
- `currency` (string): ISO 4217 code to quote in. Defaults to the market's currency.
- `destination` (string): City or place name, with country when ambiguous: 'Peterborough, United Kingdom'. Strongly recommended; the parser is more reliable with it separate.
- `max_results` (integer)
- `query` (string, required): What the guest wants, in plain language: 'near the river, pet friendly, 2 adults'. Dates in the text are read too, but the date fields win.
- `rooms` (integer): Number of rooms.

### `get_property` (~69 tokens)

Full detail for one property by slug: description, facilities, check-in and check-out times, parking, pets, children, policies, review summary and nearby places.

Input parameters:

- `slug` (string, required): The property slug from search_stays, e.g. 'delta-hotels-by-marriott-peterborough'.

### `price_stay` (~183 tokens)

Every room and rate one property has for an exact stay, live from the supplier. Each room has an all-in total, itemised fees, cancellation terms and a booking URL. `status` says whether an empty list is no rooms or a supplier outage.

Input parameters:

- `adults` (integer): Adults across all rooms.
- `checkin` (string, required): Check-in date, YYYY-MM-DD.
- `checkout` (string, required): Check-out date, YYYY-MM-DD. Must be after checkin.
- `children_ages` (array): Age of each child at check-in.
- `currency` (string): ISO 4217 code to quote in. Defaults to the market's currency.
- `rooms` (integer): Number of rooms.
- `slug` (string, required): The property slug from search_stays, e.g. 'delta-hotels-by-marriott-peterborough'.

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/com-callstay-hotels/api-mcp#diagnostics

## Score history

- 2026-09-28: 71
- 2026-09-27: 70
- 2026-09-26: 70

## Common questions

### What is the Callstay Hotels MCP server?

Callstay Hotels is an MCP server listed in the public MCP registry as com.callstay/hotels. Live hotel rates worldwide: search stays, property detail, all-in room prices, human phone desk. This page covers its hosted endpoint (https://callstay.com/api/mcp).

### Is the Callstay Hotels MCP server safe to use?

Callstay Hotels scores 71 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

### What tools does the Callstay Hotels MCP server expose?

Callstay Hotels exposes 4 tools: capabilities, search_stays, get_property, price_stay. Their descriptions and schemas cost roughly 503 tokens of context every time the server is loaded.

### Does the Callstay Hotels MCP server require authentication?

No. We connected to Callstay Hotels without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the Callstay Hotels MCP server still maintained?

Callstay Hotels is still listed as active in the MCP registry. We last reached this channel on 28 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

## Links

- Remote endpoint: https://callstay.com/api/mcp
- Website: https://callstay.com/
- Changelog RSS feed: https://verifymcp.io/servers/com-callstay-hotels/api-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/com-callstay-hotels/api-mcp.json
- HTML version of this page: https://verifymcp.io/servers/com-callstay-hotels/api-mcp