@layervai/qurl-mcp

⚠️ Renamed from @layerv/qurl-mcp in v0.4.0. The old package is deprecated and will not receive further updates. If you're using @layerv/qurl-mcp@0.3.x, swap the scope in your MCP client config — same binary, same API key, no other changes.

MCP server for qURL™ secure link management.

Quantum URL (qURL) · The internet has a hidden layer. This is how you enter.

What it does

qURL MCP Server is a Model Context Protocol server that lets AI agents (Claude, GPT, Cursor, etc.) create, resolve, list, and manage qURL secure links natively. It connects to the qURL API over stdio transport, so any MCP-compatible client can use it without custom integration code.

Quick Start

Add the server to your MCP client configuration (Claude Desktop, Claude Code, etc.):

{
  "mcpServers": {
    "qurl": {
      "command": "npx",
      "args": ["@layervai/qurl-mcp"],
      "env": { "QURL_API_KEY": "lv_live_xxx" }
    }
  }
}

Replace lv_live_xxx with your actual API key. The key must have the appropriate scopes for the tools you intend to use (see below).

Available Tools

Tool	Description	Required Scope
create_qurl	Create a secure, policy-bound link to a protected resource	qurl:write
resolve_qurl	Resolve an access token to get the target URL and grant network access	qurl:resolve
list_qurls	List active qURLs with optional pagination	qurl:read
get_qurl	Get details of a specific qURL by resource ID	qurl:read
delete_qurl	Revoke a qURL, immediately invalidating the link	qurl:write
extend_qurl	Extend the expiration of an active qURL (alias for update_qurl)	qurl:write
update_qurl	Update expiration, tags, or description on an active qURL	qurl:write
mint_link	Mint a new access link for an existing protected resource	qurl:write
batch_create_qurls	Create multiple qURLs in a single call	qurl:write
revoke_qurl_token	Revoke one qURL token without revoking sibling tokens on the resource	qurl:write
update_qurl_token	Update expiry, label, policy, or session limits on one qURL token	qurl:write
list_qurl_sessions	List active access sessions for a qURL resource	qurl:read
terminate_qurl_sessions	Terminate one or all active sessions for a qURL resource	qurl:write

Available Resources

URI	Name	Description
qurl://links	Active qURL Links	List of all active qURL links
qurl://usage	qURL Usage & Quota	Current quota and usage information

Configuration

Environment Variable	Required	Description	Default
QURL_API_KEY	Conditional (see description)	API key with appropriate scopes (qurl:read, qurl:write, qurl:resolve). The server boots without it so MCP introspection (tools/list, resources/list, prompts/list) works for directory probes — required only on the first tool call or resource read, where invocations surface a typed missing_api_key error until the key is set.	--
QURL_API_URL	No	qURL API base URL	https://api.layerv.ai

Docker

A multi-stage Dockerfile is included for container-based deployment:

docker build -t qurl-mcp .
docker run -i -e QURL_API_KEY=lv_live_xxx qurl-mcp

The image runs as the non-root node user, ships only production dependencies, and uses tini as PID 1 for clean signal handling.

If a tool call returns missing_api_key despite QURL_API_KEY looking set, check stderr for the boot-time warning — some MCP hosts hide stderr, and the warning is the fastest way to spot a whitespace-only or unset value:

docker logs <container>          # if running detached
docker run -i -e QURL_API_KEY=lv_live_xxx qurl-mcp 2>&1  # interactive

Development

npm install
npm run build
npm test
npm run lint

Additional commands:

npm run dev          # Watch mode (rebuild on changes)
npm run format       # Format source with Prettier
npm run format:check # Check formatting without modifying files

License

MIT -- LayerV AI