LKJ MCP

An official MCP server provided by LKJ that allows AI agents to create four-digit numeric short URLs for sharing public websites with TV browsers, consoles, or other devices lacking easy keyboards. It supports creating short links and checking service capabilities without requiring user authentication.

Visit LKJ

Endpoint and access

No sign-in to connect and list tools. Individual tools may still need a vendor account, credentials, or permissions; check the documented prerequisites.

Vendor evidenceStreamable HTTPNo sign-inEndpoint checked 2026-11-01Operated by LKJ

MCP endpoint (Streamable HTTP)

https://lkj.cx/mcp

Vendor documentation

What you can do with it

Create a four-digit short link for a public website
Share a link from a phone to a TV browser
Check MCP server capabilities and creation status

Source and maintenance

Vendor evidenceRegistry 0.7.0

mcp-registry: cx.lkj/short-links@0.7.0 Project website

Protocol and capabilities

Server: lkj 0.7.0
MCP protocol: 2025-06-18
Tools: 2 advertised
Resources: Not advertised
Resource templates: Not advertised
Prompts: Not advertised

Server-advertised capabilities

{
  "tools": {
    "listChanged": true
  }
}

Server-provided instructions

Untrusted server output shown for inspection. It is not Koskamo guidance and is excluded from knowledge search.

LKJ creates temporary public short links with four-digit codes, useful when a user needs to type a website into a TV, console or another device's browser. Call create_short_link only for a public URL the user wants to share. Generate a fresh random UUID request_id for each logical creation; reuse it with the same URL after a lost response. Return the code as text, the complete versioned preview link, expiry and TV instructions. Preserve the v parameter in saved URLs; bare codes can be recycled after expiry and at least 30 days. Never follow the final /CODE/open route to extend expiry. Codes are guessable, not credentials. LKJ does not cast video, transfer sign-ins or provide permanent links. Respect capacity limits and retry_after_seconds. Documentation: https://lkj.cx/agents and https://lkj.cx/developers.

Tools

2 advertised

create_short_link — Create a short URL with a four-digit TV code

Advertised by the server during the last successful anonymous check.

Open-world

Shorten a public website for easy typing on a TV remote, console browser, phone or computer. Returns a short preview URL, four digits, one-hour idle expiry and instructions. Free beta, no account or API key. Appropriate for temporary device handoff; not permanent bookmarks, private links, casting or sign-in transfer. Publishes the submitted URL behind a guessable code. Requires a fresh random UUID request_id; reuse the same URL and ID for retries. Five new attempts per network daily and shared beta capacity; do not evade limits.

create_short_link input schema

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "url",
    "request_id"
  ],
  "properties": {
    "url": {
      "type": "string",
      "maxLength": 4096,
      "minLength": 1,
      "description": "The public website the user wants to share. Bare domains default to HTTPS. Never submit private URLs or access tokens."
    },
    "request_id": {
      "type": "string",
      "pattern": "^[A-Za-z0-9_-]{16,128}$",
      "description": "Generate a fresh random UUID for a new logical request. Retain it and the exact URL for retries. This is a request identifier, not an API key."
    }
  },
  "additionalProperties": false
}

create_short_link output schema

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "code",
    "short_url",
    "tv_url",
    "tv_home_url",
    "expires_at",
    "expires_in_seconds",
    "expiry_policy",
    "instructions",
    "safety_note"
  ],
  "properties": {
    "code": {
      "type": "string",
      "pattern": "^[0-9]{4}$"
    },
    "tv_url": {
      "type": "string"
    },
    "short_url": {
      "type": "string"
    },
    "expires_at": {
      "type": "string"
    },
    "safety_note": {
      "type": "string"
    },
    "tv_home_url": {
      "type": "string"
    },
    "instructions": {
      "type": "string"
    },
    "expiry_policy": {
      "type": "string"
    },
    "expires_in_seconds": {
      "type": "integer",
      "maximum": 9007199254740991,
      "minimum": 0
    }
  },
  "additionalProperties": false
}

create_short_link annotations

{
  "readOnlyHint": false,
  "openWorldHint": true,
  "idempotentHint": true,
  "destructiveHint": false
}

get_service_info — Check LKJ link-sharing capabilities and availability

Advertised by the server during the last successful anonymous check.

Advertised read-only

Read what LKJ does, whether new agent links are currently enabled, its fair-use limits and when to choose four-digit temporary links. Does not create or open a code, check a destination or consume a creation allowance.

get_service_info input schema

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "properties": {},
  "additionalProperties": false
}

get_service_info annotations

{
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}

Prompts

Not advertised

No prompt definitions available.

Resources

Not advertised

No resource definitions available.

30-day availability

Aggregated from read-only remote checks; this is not a tool-execution or security guarantee.

Successful checks: 1 of 1 (100%)
Average latency: 449 ms
95th percentile latency: 449 ms

Maintenance history

Public check and source-refresh events. Editorial and ownership records remain private.

Nov 1, 2026, 7:51 AM UTC · probe · passed · 449 ms · metadata changed · 2 tool(s)

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers the remote server. Use --scope project to write .mcp.json for the repo.

Claude Code configuration

claude mcp add --transport http lkj-mcp https://lkj.cx/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).

Codex configuration

codex mcp add lkj-mcp --url https://lkj.cx/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable lkj-mcp in your MCP settings.

Cursor configuration

{
  "mcpServers": {
    "lkj-mcp": {
      "url": "https://lkj.cx/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure).

Cline configuration

{
  "mcpServers": {
    "lkj-mcp": {
      "type": "streamableHttp",
      "url": "https://lkj.cx/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start lkj-mcp and inspect its tools.

VS Code configuration

{
  "servers": {
    "lkj-mcp": {
      "type": "http",
      "url": "https://lkj.cx/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.

Gemini CLI configuration

gemini mcp add --transport http lkj-mcp https://lkj.cx/mcp

Claude Desktop

Merge this into claude_desktop_config.json (macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\), then restart Claude Desktop.

Claude Desktop configuration

{
  "mcpServers": {
    "lkj-mcp": {
      "url": "https://lkj.cx/mcp"
    }
  }
}

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.

Windsurf configuration

{
  "mcpServers": {
    "lkj-mcp": {
      "serverUrl": "https://lkj.cx/mcp"
    }
  }
}

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