ChurnLens MCP Server

by kindrat86 Your server? Claim it

not responding

ChurnLens is listed as active in the registry but did not answer our last check. It exposes 6 tools. Last commit 25 Jul 2026.

Buyer-side SaaS due-diligence maths: NRR, GRR, revenue concentration, zombie MRR, LTV:CAC.

Uptime history 91 days of history · worst day 0%

91 days agonow

0.0%

Uptime 24h

0 of 91 checks

Tools

read from the server

91 ms

Response time

average over 24h

Stars

last commit 25 Jul 2026

ChurnLens does not always answer

Over the last week it answered 2.0% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 14 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add churnlens --transport http https://churnlens.site/api/mcp

Settings → Connectors → Add custom connector, then paste this address

https://churnlens.site/api/mcp

~/.codex/config.toml

[mcp_servers.churnlens]
url = "https://churnlens.site/api/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "churnlens": {
      "url": "https://churnlens.site/api/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "churnlens": {
      "type": "http",
      "url": "https://churnlens.site/api/mcp"
    }
  }
}

Available tools 6

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

calculate

calculate_churn_rate

Calculate net revenue retention (NRR), gross revenue retention (GRR), revenue churn and implied customer lifetime from one period's MRR movements. Also reports the NRR-minus-GRR spread, which reveals how much churn is being masked by expansion revenue.

calculate_ltv

Calculate gross-margin-adjusted customer lifetime value, the LTV:CAC ratio and CAC payback in months. Omitting gross margin yields lifetime revenue rather than lifetime value — usually a third of the number.

analyze

analyze_revenue_concentration

Assess customer concentration risk across a book of revenue using the Herfindahl-Hirschman Index (HHI), top-N share and whale detection. Answers the question every acquirer asks first: how much revenue walks out with one logo?

detect

detect_zombie_mrr

Identify dormant-but-paying accounts — revenue that still counts in MRR but whose customers have stopped showing up. Zombie revenue is one renewal notice from cancelling and is invisible to standard revenue dashboards.

score

score_saas_health

Score a SaaS business 0-100 across five dimensions — retention, growth, concentration, efficiency and durability — and return the composite. Every mapping is published, so the score can be reconstructed by hand.

scoring

get_scoring_bands

Return the scoring thresholds ChurnLens applies to NRR, revenue concentration and the composite health score. These are bands, not measured benchmark data — the sourced benchmark figures are cited at https://churnlens.site/benchmarks.

Endpoints

URL	Transport	State	Latency	Checked
https://churnlens.site/api/mcp	streamable-http	answering	91 ms	14 min ago

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ChurnLens — questions

Answers built from our own checks of this server.

What can ChurnLens do?

It exposes 6 tools, read directly from the server on our last check. Among them: analyze_revenue_concentration, calculate_churn_rate, calculate_ltv, detect_zombie_mrr, get_scoring_bands, score_saas_health. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is ChurnLens working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 0 of 91 checks got a reply (0.0%), average response time 91 ms. The bar chart above shows every period we have measured.

The registry lists ChurnLens as active — why does it not respond?

The official MCP registry stores what the author submitted; it does not verify that the server still runs. We check the endpoint ourselves, and this one does not answer. Catalogues that copy the registry without checking will show it as working.

How do I connect ChurnLens?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does ChurnLens need an API key?

No. ChurnLens completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 6 of them are readable on this page. This is what we observed, not what the docs claim.

Is ChurnLens open source?

The code is open source: it is published under the MIT licence and 0 stars on GitHub. The licence covers the code in the repository, not the hosted service at churnlens.site, which runs on its operator's own terms.