ChurnLens MCP Server

by kindrat86 Your server? Claim it

answering

ChurnLens is answering right now. Last checked 15 min ago. 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 48 days of history · worst day 45%

48 days agonow

62.6%

Uptime 24h

57 of 91 checks

Tools

read from the server

287 ms

Response time

average over 24h

Stars

last commit 25 Jul 2026

ChurnLens does not always answer

Over the last week it answered 59.9% 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 15 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

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "churnlens": {
      "url": "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

{
  "mcpServers": {
    "churnlens": {
      "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	293 ms	15 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 57 of 91 checks got a reply (62.6%), average response time 287 ms. The bar chart above shows every period we have measured.

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 with the file path 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.

How fast is ChurnLens?

It answers our handshake in 287 ms on average, which is faster than 52% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.

Is ChurnLens open source?

Yes — it is published under the MIT licence and 0 stars on GitHub. The source link is on this page, so you can read exactly what it does with your data before you connect it.