RetentionCheck MCP server

by brianfofficial·io.github.brianfofficial/retentioncheck-mcp-server·v0.6.2

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Pull churn from Stripe, Postgres, MySQL, or pasted feedback. AI-ranked drivers + fixes.

C55/100grade C

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Safety scan

C55/100

full report

Adoption

New

51 downloads/wk

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If you have run it, two minutes of your experience saves the next person an afternoon.

RetentionCheck tools (4)

write = sends, deletes, buys or posts

Read from the package source without running it. The installed server may list more.

analyze_churn
Analyze customer cancellation feedback to identify churn patterns, severity, and actionable recommendations. Paste raw feedback text (one response per line) or CSV data.
analyze_sql_churn
Pull canceled subscriptions directly from a Postgres or MySQL database and analyze them for churn patterns. Requires POSTGRES_URL or MYSQL_URL env var (use a read-only database user , see retentioncheck.com/integrations for the exact SQL to create one). You describe your schema in plain arguments (table, cancelled_at_column, reason_column, etc.) and the tool generates a safe parameterized SELECT q
analyze_stripe_churn
Pull canceled subscriptions directly from Stripe and analyze them for churn patterns. Requires STRIPE_SECRET_KEY env var (use a restricted read-only key with Subscriptions, Customers, and Prices read access). Includes plan, MRR, sub age, and voluntary/involuntary context for each cancellation. Defaults to last 90 days.
get_example_analysis
See an example churn analysis to understand what RetentionCheck produces. Returns a pre-computed analysis , no API key required.

Public scan report

scanner v0.1.9 · 2026-09-27 · same rubric, same numbers if you re-run it

no findings

Code scan2 source files scanned25/25
–Live reliabilityno gateway calls yet and no remote to proben/a
–Tool poisoningtools not inspected (local package is not executed); not countedn/a
Auth qualitystatic API keys via environment variables6/15
Maintenancerepository not readable: repo not found3/15
Maintainer identityno repository or website to verify2/10

Overall 55/100. Components that don't apply are left out of the denominator. Any critical finding is an F.Rubric Appeal a finding JSON

How RetentionCheck compares

Against every graded E-commerce MCP server, from our own scans and uptime checks. Updated after each scan run.

Safety score: 55/100; higher than 10% of 2,174 E-commerce servers
Tools: 4; the typical E-commerce server has 6
Tools that change things: 0%; typical: 0%. Fewer write tools means less an agent can break
Downloads a week: 51; more than 48% of 411 E-commerce servers with a package

What its tools let an agent do: 4 read

Install RetentionCheck in Claude Code, Cursor or VS Code

Runs npx -y @retentioncheck/mcp-server on your machine. Read the scan report first; the gateway never runs local packages.

claude mcp add retentioncheck-mcp-server -- npx -y @retentioncheck/mcp-server

Add to Cursor

RetentionCheck: common questions

Is RetentionCheck MCP server safe?: With care: it is graded C, so read the findings first (55/100). Read the RetentionCheck safety report
How do I install RetentionCheck?: It runs on your machine. Copy the Claude Code, Cursor, VS Code or Claude Desktop config from the install section.
Does RetentionCheck need an API key?: Yes. The registry entry asks for ANTHROPIC_API_KEY, STRIPE_SECRET_KEY, POSTGRES_URL, MYSQL_URL.
Is RetentionCheck maintained?: The latest release is v0.6.2.
What can I use instead of RetentionCheck?: Servers from other publishers that do the same job: Stripe MCP server, Sessy — Amazon SES observability MCP server and COTAL actions (cotal.ai) MCP server.
How does RetentionCheck compare with other E-commerce MCP servers?: safety score 55/100 (higher than 10% of 2,174 E-commerce servers); tools 4 (the typical E-commerce server has 6); tools that change things 0% (typical: 0%. Fewer write tools means less an agent can break). Full comparison.

Alternatives to RetentionCheck

Same job from other publishers: the closest match first, then the best rated.

Stripe
MCP server integrating with Stripe - tools for customers, products, payments, and more.
not reviewed
Established
A
Sessy — Amazon SES observability
Read-only Amazon SES observability: search events, inspect bounces, pull delivery stats.
not reviewed
Established
A
COTAL actions (cotal.ai)
cotal.ai actions: product overview, site search, build log, feedback, Cloud waitlist, updates, calls
not reviewed
Established
B
Stripe Acp
Stripe ACP — AI agent checkout, payment delegation, products, invoices
More from codespar →
not reviewed
Growing
B
Webhook Toolkit
Webhook URLs for AI agents: receive, wait for, replay, sign and verify webhooks (Stripe, GitHub…).
not reviewed
Growing
A

Run it through the gateway

Local package. It runs on your machine, not through the gateway.

Rating: —
Safety grade: C · 55/100
Stars: –
Downloads/wk: 51
Price: Free
Licence: MIT
Transport: Local · npm
Version: 0.6.2
Category: E-commerce
Last release: —

Credentials it needs

ANTHROPIC_API_KEYsecretAnthropic API key for running churn analysis (required for analyze_churn, analyze_stripe_churn, and analyze_sql_churn; get_example_analysis works without it).
STRIPE_SECRET_KEYsecretStripe API key for analyze_stripe_churn. Use a RESTRICTED (read-only) key with these permissions: Subscriptions Read, Customers Read, Prices Read. Create one at https://dashboard.stripe.com/apikeys/create. Optional — only required for the analyze_stripe_churn tool.
POSTGRES_URLsecretPostgres connection string for analyze_sql_churn when dialect='postgres'. Format: postgres://user:pass@host:5432/db?sslmode=require. Use a READ-ONLY user — see retentioncheck.com/integrations for the exact GRANT SQL. Optional — only required for the analyze_sql_churn tool with postgres dialect.
MYSQL_URLsecretMySQL connection string for analyze_sql_churn when dialect='mysql'. Format: mysql://user:pass@host:3306/db?ssl=true. Use a READ-ONLY user — see retentioncheck.com/integrations for the exact GRANT SQL. Optional — only required for the analyze_sql_churn tool with mysql dialect.
RETENTIONCHECK_TELEMETRYSet to 0 to opt out of anonymous usage telemetry. Telemetry tracks tool invocations and aggregate counts — never the feedback text, financial values, or any PII.

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