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Retainer MCP Server

by theluckystrike Your server? Claim it
answering

Retainer is answering right now. Last checked 13 min ago. It exposes 11 tools. Last commit 22 Oct 2026.

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

Uptime history 29 days of history
29 days agonow
100.0%
Uptime 24h
88 of 88 checks
11
Tools
read from the server
245 ms
Response time
average over 24h
2
Stars
last commit 22 Oct 2026

What changed 1

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 15 October 2026. No other catalogue keeps this.

15 Oct a tool changed version

Nothing serious here today

Today is the operative word: we check Retainer every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Three servers free · no card

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 13 min ago.

run in your terminal
claude mcp add retainer --transport http https://mcp.zovo.one/mcp/deposits-retainer
Settings → Connectors → Add custom connector, then paste this address
https://mcp.zovo.one/mcp/deposits-retainer
~/.codex/config.toml
[mcp_servers.retainer]
url = "https://mcp.zovo.one/mcp/deposits-retainer"
.cursor/mcp.json
{
  "mcpServers": {
    "retainer": {
      "url": "https://mcp.zovo.one/mcp/deposits-retainer"
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "retainer": {
      "type": "http",
      "url": "https://mcp.zovo.one/mcp/deposits-retainer"
    }
  }
}

Available tools 11

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

deposit
deposit_apply
Apply part of a held deposit to one invoice: it records that amount as a PAYMENT through the invoice server. amount_minor defaults to the lesser of held and owed. More than either, or a pre-arrival date, is refused.
deposit_balance
Answer "how much of theirs am I holding?" for one client or everyone: received, applied to invoices, refunded and still held, one row per currency, never added across them. Reads only; deposit_list shows each deposit.
deposit_delete
Delete a deposit that never moved money, freeing that month's free-tier slot. One with anything applied or refunded is refused, naming it, since a payment or refund would be left with nothing behind it.
deposit_list
List deposits newest first: DEP number, client, kind, date, reference and what was received, applied, refunded and still held, with the same four totalled per currency. Filter by client, status, kind, date.
deposit_record
Record a security or retainer deposit received from a client, in minor units, with its currency, the date it arrived and the bank reference. Returns the DEP-YYYY-NNNN id.
deposit_refund
Give part or all of a held deposit back to the client, with the date and how it was sent. Refuses more than is still held. The invoice server is not touched: a refund is not a payment.
deposit_statement_pdf
Call this tool to render one client's A4 deposit statement and return a download link valid for one hour. Titled DEPOSIT STATEMENT, every movement in date order, closing with what is still held. Pro.
deposit_statement_text
Turn one client's deposits into a plain-text statement to paste into an email: every movement in date order and the closing balance held. Pass currency when they have more than one. Also a .txt download link valid one hour. Free on every tier.
license
license_activate
Turn Pro on for this connection with key, an MCPL1.<payload>.<signature> issued at checkout for this server or the bundle. Data under your token stays; a wrong or expired key changes nothing. license_status confirms it.
license_status
Report this endpoint's licence state for your token as JSON: the product, the tier free or pro, why it is not Pro, and the checkout URL. Call it to explain a free-tier refusal. No arguments, nothing changes.
deposits
deposits_report
The deposit book at a date: held per currency, received, applied and refunded, the oldest holdings with days held, and every deposit older than N days with nothing applied. Pro; deposit_balance is free.

Endpoints

URLTransportStateLatencyChecked
https://mcp.zovo.one/mcp/deposits-retainer streamable-http answering 580 ms 13 min ago

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Retainer — questions

Answers built from our own checks of this server.

What can Retainer do?
It exposes 11 tools, read directly from the server on our last check. Among them: deposit_apply, deposit_balance, deposit_delete, deposit_list, deposit_record, deposit_refund and 5 more. 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 →
What is Retainer mostly used for?
Its tools cluster around deposit and license. That is what this server is built to work with — the grouping comes from the actual tool names, not from a category we assigned.
Is Retainer working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 88 of 88 checks got a reply (100.0%), average response time 245 ms. The bar chart above shows every period we have measured.
How do I connect Retainer?
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 Retainer need an API key?
No. Retainer completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 11 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is Retainer?
It answers our handshake in 245 ms on average, which is faster than 61% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.
Is Retainer open source?
The code is open source: it is published under the MIT licence, written in JavaScript and 2 stars on GitHub. The licence covers the code in the repository, not the hosted service at mcp.zovo.one, which runs on its operator's own terms.