Retainer MCP server

by theluckystrike·io.github.theluckystrike/retainer·v0.22.6·2 stars

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Client retainers held on account: record one, draw it down against invoices, refund it.

B73/100grade B

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Safety scan

B73/100

full report

Adoption

Growing

2 stars

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

Retainer tools

No tool declarations could be read from the package source. They show once the server is installed.

Public scan report

scanner v0.1.10 · 2026-10-15 · same rubric, same numbers if you re-run it

no findings

–Code scanpackage could not be scannedn/a
–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
Maintenancelast push 0 days ago15/15
Maintainer identityregistry namespace matches repository owner; GitHub account older than a year8/10

Overall 73/100. Components that don't apply are left out of the denominator. Any critical finding is an F.Rubric Appeal a finding JSON

How Retainer compares

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

Safety score: 73/100; higher than 39% of 48,255 servers
GitHub stars: 2; more than 75% of 28,688 servers

Release history: 4 versions in the registry since 2026-09-07, latest 2026-10-14, typically one every 18 days.

Install Retainer in Claude Code, Cursor or VS Code

The registry entry has no remote endpoint or installable package.

What the publisher says

From the Retainer repository's README, as published. We do not edit it. Read it on GitHub

MCP servers by theluckystrike

Practical Model Context Protocol servers for people who work inside Claude, Cursor and other MCP clients. Every server runs locally over stdio, keeps all data on your machine, and has a genuinely useful free tier. Pro unlocks the limits for a one-time payment: $19 per server or $39 for the bundle, lifetime.

46 servers plus the office-suite aggregator, 45 of them also reachable as a hosted endpoint with no install.

No install? Use any server instantly as a hosted endpoint: https://mcp.zovo.one/mcp/ — or browse the catalog at mcp.zovo.one.

That is the invoice server answering a real prompt: a client, some hours, a VAT rate, and a numbered PDF at the end. Every server in the table below has a demo like it.

Two ways to run any of these, both working today.

One click. Download the server's .mcpb bundle from the latest release and open it in Claude Desktop. No terminal, no config file.
No install at all. Point a client at https://mcp.zovo.one/mcp/. GET https://mcp.zovo.one/mcp/connect mints a free token and prints a ready URL for each server.

A third way is coming and does not work yet: the npm packages are unpublished, so npx -y @theluckystrike/mcp- returns 404 today. The commands below are written for the day it is published; use one of the two paths above until then.

Shortened. The full README is on GitHub.

Nothing above is checked by us. What we check is on the safety report.

Retainer: common questions

Is Retainer MCP server safe?: Mostly: it is graded B (73/100). Read the Retainer safety report
Does Retainer need an API key?: Yes. The registry entry asks for MCP_LICENSE_KEY.
Is Retainer maintained?: The last commit was 20 days ago (2026-10-15). The latest release is v0.22.6.
How does Retainer compare with other MCP servers?: safety score 73/100 (higher than 39% of 48,255 servers); github stars 2 (more than 75% of 28,688 servers). Full comparison.