LienDeadline/liendeadline-mcp

This MCP server connects Claude, ChatGPT, Cursor, VS Code and any other MCP client to
LienDeadline, the deadline engine for US construction material suppliers.
There is nothing to install: add one URL.
Quick start ·
What you can ask ·
Coverage ·
Tools ·
Privacy ·
liendeadline.com
## Why LienDeadline
Miss a preliminary notice or a lien filing deadline and a supplier can lose its lien rights on the
job, and with them the leverage to get paid. The rules change with the state, the project type and
who hired you. LienDeadline turns your delivery dates into those deadlines and shows its work.
Deadlines from delivery dates. Preliminary notice and lien filing deadlines from your first
and last delivery and a few yes, no or unknown questions.
The statute behind every date. Each deadline cites its source, so your team and your
counsel can check it.
Never a guessed date. Missing facts, states that aren't covered yet and public projects come
back as "needs review", with the reason.
Lien guides for all 50 states and DC. Rule summaries, deadline tables and common questions,
with statute citations.
Safe by design. Supplier discovery and calculations require a caller customer key; completed
calculations consume plan allowance. Public guides need no account or key. Nothing sends
notices, files liens or makes payments.
## Quick start
Connecting to the hosted server and using public guides needs no install, account or key:
https://mcp.liendeadline.com/mcp
The no-authentication connection settings below cover the transport and public guides. Supplier
discovery and calculations require the caller's dedicated customer key through the client's
approved credential settings. Discovery does not consume calculation allowance; completed
calculations do.
| Client | How to add it |
| Claude (web, desktop, mobile) | Open LienDeadline in Claude's Connectors directory and connect it. |
| Claude Code | claude mcp add --transport http liendeadline https://mcp.liendeadline.com/mcp |
| Cursor | |
| VS Code | |
| ChatGPT | Open Plugins, select + → Add custom MCP server, paste the URL above and choose No authentication. |
| Codex CLI | codex mcp add liendeadline --url https://mcp.liendeadline.com/mcp |
| Any MCP client | Streamable HTTP at the URL above, no authentication. |
Want your agent to ask the right questions too? The
LienDeadline agent skill (GitHub) teaches it which facts to collect.
The Claude Code plugin adds the skill and this server in one step:
bash
claude plugin marketplace add LienDeadline/skills
claude plugin install liendeadline@liendeadline
Run it locally instead (npm, stdio)
The local server needs Node.js 22.22 or newer and serves every tool, including the two
customer API tools. It ships npm-shrinkwrap.json, so npx installs the
exact dependency versions each release was tested with.
Claude Desktop: download liendeadline-mcp- .mcpb from the
latest release and open it.
Claude Code:
bash
claude mcp add liendeadline -- npx -y liendeadline-mcp
Codex CLI:
bash
codex mcp add liendeadline -- npx -y liendeadline-mcp
Cursor, Windsurf and other mcpServers clients:
json
"mcpServers": {
"liendeadline": { "command": "npx", "args": ["-y", "liendeadline-mcp"] }