# KooLink URL Shortener (remote · mcp.kool.ink)

Shorten any long URL into a clean kool.ink link. Free, unlimited, no signup. AI-agent ready.

- Trust score: 74/100 (medium)
- Change this week: −5
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-10-25

## Components

- remote · `mcp.kool.ink`: 74/100 (this document), [markdown](https://verifymcp.io/servers/ink-kool-url-shortener/mcp.md), [page](https://verifymcp.io/servers/ink-kool-url-shortener/mcp)

## Channel facts

- Endpoint: `https://mcp.kool.ink`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.2.0`

## 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 2026-10-25.

- **Endpoint Security**: 63/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - Authorisation not fully verified: no authorisation is required to call this server, and 3 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe.
  - HTTPS is enforced; there's no plaintext access path.
  - The HSTS (Strict-Transport-Security) header is present.
  - 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**: 85/100
  - AI-judged instruction clarity (excellent).
  - Tool/resource definitions use about 223 tokens (~74/item across 3 items; 3 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 60/100
  - Stability observed for 18 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% 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 3 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 3 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 20/100
  - Spec-recency check failed: implements MCP spec 2024-11-05; the latest is 2026-07-28.

## Install

### How do I install the KooLink URL Shortener MCP server?

KooLink URL Shortener is a hosted endpoint at https://mcp.kool.ink/, 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 ink-kool-url-shortener 'https://mcp.kool.ink/'
```

### Cursor

```json
{
  "mcpServers": {
    "ink-kool-url-shortener": {
      "url": "https://mcp.kool.ink/"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "ink-kool-url-shortener": {
      "type": "http",
      "url": "https://mcp.kool.ink/"
    }
  }
}
```

### Codex

```toml
[mcp_servers.ink-kool-url-shortener]
url = "https://mcp.kool.ink/"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "ink-kool-url-shortener": {
      "type": "remote",
      "url": "https://mcp.kool.ink/",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add ink-kool-url-shortener --url 'https://mcp.kool.ink/' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  ink-kool-url-shortener:
    url: "https://mcp.kool.ink/"
```

### Netclaw

```json
{
  "McpServers": {
    "ink-kool-url-shortener": {
      "Transport": "http",
      "Url": "https://mcp.kool.ink/"
    }
  }
}
```

### Vellum

```bash
assistant mcp add ink-kool-url-shortener -t streamable-http -u 'https://mcp.kool.ink/'
```

### Other

```json
{
  "mcpServers": {
    "ink-kool-url-shortener": {
      "type": "http",
      "url": "https://mcp.kool.ink/"
    }
  }
}
```

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.

### 2026-10-25 (score 74, +1)

No change was recorded against any check on this day. Stability & Change Management went from 57 to 60. That category is still filling its 30-day observation window: 17 days of observed history at the previous scan, 18 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-23 (score 73, +1)

No change was recorded against any check on this day. Stability & Change Management went from 50 to 53. That category is still filling its 30-day observation window: 15 days of observed history at the previous scan, 16 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-21 (score 72, +37)

- [security improvement] Injection markers: unverified → pass
- [security] Authorization: Authorisation not fully verified: no authorisation is required to call this server, and 3 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe.
- [functional regression] MCP protocol: unverified → fail
- [functional improvement] Endpoint reachability: not serving MCP → reachable
- [functional improvement] Tool coverage: unverified → 100
- [functional improvement] Stability: unverified → 0.47

### 2026-10-20 (score 35, −44)

- [security regression] Endpoint reachability: reachable → not serving MCP
- [security regression] Stability: pass → unverified
- [security regression] Tool safety: pass → unverified
- [security] Authorization: Authorisation not fully verified: no authorisation is required to connect, but we couldn't read the whole tool list to see what that exposes.
- [functional regression] Capabilities: fail → unverified
- [functional regression] Tool coverage: 100 → unverified

### 2026-10-10 (score 79, +56)

- [security improvement] Injection markers: unverified → pass
- [security improvement] Stability: unverified → pass
- [security improvement] HSTS header: fail → pass
- [security improvement] Transport: fail → pass
- [security] Authorization: Authorisation not fully verified: no authorisation is required to call this server, and 3 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe.
- [functional regression] MCP protocol: unverified → fail
- [functional improvement] Endpoint reachability: not serving MCP → reachable
- [functional improvement] Tool coverage: unverified → 100

### 2026-09-28 (score 23, 0)

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

### 2026-09-25 (score 23, 0)

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

### 2026-09-21 (score 23)

- [security regression] Endpoint reachability: reachable → not serving MCP
- [security regression] Stability: 0.63 → unverified
- [security regression] Tool safety: pass → unverified
- [security regression] Transport: pass → fail
- [security regression] HSTS header: pass → fail
- [security] Authorization: Authorisation not fully verified: no authorisation is required to connect, but we couldn't read the whole tool list to see what that exposes.
- [functional regression] Capabilities: fail → unverified
- [functional regression] Tool coverage: 100 → unverified

## MCP tools (3)

### `shorten_url` (~82 tokens)

Shorten a long URL using KooLink and return a compact kool.ink short link. Use this whenever the user wants a shortened URL, a tidy link to share, or a redirect for a long destination.

Input parameters:

- `label` (string): Optional label for the API key owner's records.
- `url` (string, required): The destination URL to shorten (http or https).

### `link_stats` (~81 tokens)

Get view analytics for one of the user's own KooLink short links: total and valid (fraud-filtered) views, breakdowns by device, country and referrer, plus a trailing 7-day trend. Use this to answer 'how is my link performing'.

Input parameters:

- `code` (string, required): The short code (the part after kool.ink/).

### `list_links` (~60 tokens)

List the user's short links with their valid view counts, most recent first. Useful to survey overall link performance or to find a code to dig into with link_stats.

Input parameters:

- `limit` (number): Max links to return (1-100, default 20).

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/ink-kool-url-shortener/mcp#diagnostics

## Score history

- 2026-10-25: 74
- 2026-10-24: 73
- 2026-10-23: 73
- 2026-10-22: 72
- 2026-10-21: 72
- 2026-10-20: 35
- 2026-10-19: 79
- 2026-10-18: 79
- 2026-10-17: 79
- 2026-10-16: 79
- 2026-10-15: 79
- 2026-10-14: 79
- 2026-10-13: 79
- 2026-10-12: 79
- 2026-10-11: 79
- 2026-10-10: 79
- 2026-10-04: 23
- 2026-10-03: 23
- 2026-10-02: 23
- 2026-10-01: 23
- 2026-09-30: 23
- 2026-09-29: 23
- 2026-09-28: 23
- 2026-09-27: 23
- 2026-09-26: 23
- 2026-09-25: 23
- 2026-09-24: 23
- 2026-09-23: 23
- 2026-09-22: 23
- 2026-09-21: 23

## Common questions

### What is the KooLink URL Shortener MCP server?

KooLink URL Shortener is an MCP server listed in the public MCP registry as ink.kool/url-shortener. Shorten any long URL into a clean kool.ink link. Free, unlimited, no signup. AI-agent ready. This page covers its hosted endpoint (https://mcp.kool.ink).

### Is the KooLink URL Shortener MCP server safe to use?

KooLink URL Shortener scores 74 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 KooLink URL Shortener MCP server expose?

KooLink URL Shortener exposes 3 tools: shorten_url, link_stats, list_links. Their descriptions and schemas cost roughly 223 tokens of context every time the server is loaded.

### Does the KooLink URL Shortener MCP server require authentication?

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

### Is the KooLink URL Shortener MCP server still maintained?

KooLink URL Shortener is still listed as active in the MCP registry. We last reached this channel on 25 October 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://mcp.kool.ink/
- Repository: https://github.com/KooLink/koolink-cli
- Website: https://kool.ink/
- Changelog RSS feed: https://verifymcp.io/servers/ink-kool-url-shortener/mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/ink-kool-url-shortener/mcp.json
- HTML version of this page: https://verifymcp.io/servers/ink-kool-url-shortener/mcp