McpStamp Dunning Letters

Name: McpStamp Dunning Letters
Author: theluckystrike

作者：theluckystrike版本 0.23.0i★ –i电脑或云端

注册名称io.github.theluckystrike/dunning-letters

安装

概览

作者提供的说明（英文原文）

Chase unpaid invoices: reminder, firm reminder and final notice letters, and a daily chase list.

PopNx MCP 的三大支柱

这三项永远不会合并成一个分数：意见、测量和人气是不同的东西。

用户评价i暂无评价评价功能将在后续阶段与账户功能一起开放
我们的基础检查i3 项中通过 3 项依据公开信息检查；尚未扫描代码
使用情况i非常新★ –

它能帮你做什么

我们还没有为它写通俗的介绍。下面是我们从注册中心读取到的事实。

连接方式: 电脑或云端
传输方式: stdio, Streamable HTTP
分类: 会计、财务与税务
你需要填写：MCP_LICENSE_KEY

安装

选择你使用的 AI 应用，然后复制设置。

安装之前

基础检查：3 项中通过 3 项
在作者的服务器上运行：你向它提出的内容会经过他们的服务器。
可以做 11 件事（工具） invoice_register, payment_record, letter_render, letter_sent …
需要你自己填写： MCP_LICENSE_KEY

标为机密的值是你账户的钥匙。千万不要分享给别人，也不要粘贴到聊天里。

你需要

在云端运行无需安装任何东西，通过互联网连接

你用的是哪个应用？

ClaudeClaude CodeCursorVS CodeChatGPT

在上方选择你的应用。我们会记住它，下次按钮会显示“安装到 …”。

适用于网页版、桌面版和手机版 Claude：

打开 Settings → Connectors
点击 Add custom connector
粘贴下面的地址，然后点击 Add
如果要求登录，请登录作者的服务

https://mcp.zovo.one/mcp/dunning-letters

下载作者的 .mcpb 文件

链接指向作者自己的文件；我们不托管也不重新打包它。打开文件后，Claude Desktop 会进行安装。

在终端中运行这条命令

claude mcp add --transport http dunning-letters https://mcp.zovo.one/mcp/dunning-letters

运行前请先填写空着的值。

在 Cursor 中打开

或者自己复制设置

粘贴到项目中的 .cursor/mcp.json，或 ~/.cursor/mcp.json

{
  "mcpServers": {
    "dunning-letters": {
      "url": "https://mcp.zovo.one/mcp/dunning-letters"
    }
  }
}

浏览器会先询问是否打开应用，然后应用会显示设置并请你确认。密钥的值会留空，由你自己填写。

在 VS Code 中打开

或者自己复制设置

粘贴到项目中的 .vscode/mcp.json

{
  "servers": {
    "dunning-letters": {
      "type": "http",
      "url": "https://mcp.zovo.one/mcp/dunning-letters"
    }
  }
}

浏览器会先询问是否打开应用，然后应用会显示设置并请你确认。密钥的值会留空，由你自己填写。

ChatGPT 只能连接互联网上的服务器：

打开网页版 ChatGPT → Settings → Connectors (Apps)
点击 Create 或 Add（部分套餐需要先在 Advanced 中开启 Developer mode）
粘贴下面的地址，起个名字，然后保存
如果要求登录，请登录作者的服务

https://mcp.zovo.one/mcp/dunning-letters

菜单名称可能因套餐和版本不同而略有差异。

你的选择通过 Cookie 保存在这台设备上，无需账户。

需要你填写的值

MCP_LICENSE_KEY 机密 env
Optional Pro license key (MCPL1....). Verified offline.

这些设置是根据作者在注册中心的条目生成的。如果 README 的写法不同，请以 README 为准。

它能做什么

工具名称和描述与服务器在 2026年11月6日报告的完全一致。这些内容由作者撰写，不是我们写的；我们以纯文本形式显示。

invoice_register
Start chasing an unpaid invoice: register the client, the invoice reference, the amount in integer cents, the currency and the due date, and get the three-letter escalation schedule (reminder 1, reminder 2, final notice) with the date each falls due. Free tier: 3 unpaid invoices
payment_record
Record money received against a chased invoice, in whole MINOR units: a part payment lowers what is still chased, a payment that covers the balance closes the ladder and frees the free-tier slot. Returns the outstanding amount.
letter_render
Chase an unpaid invoice: generate the letter for the current stage of the ladder -- reminder 1 (polite), reminder 2 (firm, with the late fees note) or the final notice (before-action wording) -- as Markdown or as self-contained printable HTML. Nothing is emailed or sent anywhere:
letter_sent
Record that a chase letter was actually sent, with its date, so the ladder advances to the next stage. Letters go out in order: reminder 2 cannot be recorded before reminder 1. Returns what is due next and when.
overdue_list
Every unpaid invoice past its due date: how many days late, what is still owed, which letters have gone out, and what is due next and when. Sorted by days late, worst first.
aging_summary
The aging summary across every unpaid invoice: current, 1-30, 31-60, 61-90 and 91+ day buckets, with counts and totals in integer cents, per currency. This is the answer to "how much am I owed, and how stale is it".
chase_today
The day's chase list: which invoices cross an escalation threshold today, which letter to send each and how long it has been waiting, what falls due in the next few days, and which invoices have had all three letters and need a decision outside this server.
invoice_status
One chased invoice in full: what was billed, what has been paid and what is still owed, every letter sent with its date, the escalation schedule with each stage's state, and what happens next and when.
invoice_delete
Delete an invoice entered wrongly, by id or reference: the record, its payments and its letter history. The id is not reissued, so a gap in the DUN series is the record that a deletion happened.
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.
license_activate
Turn Pro on for this connection with key, an MCPL1. . 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.

基础检查i

我们检查的是任何人都能看到的信息；我们没有阅读代码。不适用的检查项不计入总数。 · 检查于 2026年11月9日

✓ 通过
作者与仓库一致
注册名称已通过 GitHub 账户 theluckystrike 验证，该账户拥有此仓库
… 尚未检查
仍在维护
我们还没有从 GitHub 读取这个仓库
… 尚未检查
有许可证
我们还没有从 GitHub 读取这个仓库
✓ 通过
端点有响应
在 41 毫秒内响应（HTTP 200）
– 不适用
使用 OAuth 登录
无需登录
✓ 通过
工具描述中没有隐藏指令
已读取 11 个工具描述，未发现针对 AI 的隐藏指令

与“会计、财务与税务”中的其他服务器比较i

星标数多于此分类中其他 3020 个服务器的 0%
发布到注册中心的时间比此分类中其他 3020 个服务器的 78% 更新
基础检查结果等于或优于此分类中其他 3020 个服务器的 100%

与注册中心里这个分类中所有活跃的服务器比较。只有当发布者拥有该仓库时，星标数才计入。

常见问题

McpStamp Dunning Letters 安全吗？

它在 3 项适用的基础检查中通过了 3 项。我们没有阅读代码。在添加密钥或令牌之前，请先看看这个服务器要求哪些权限，并使用只具备所需权限的密钥。

它需要哪些密钥或代码？

你需要填写：MCP_LICENSE_KEY

它在我的电脑上运行还是在云端？

两种方式都可以：安装在你的电脑上，或者连接云端版本。

它还在维护吗？

GitHub 仓库最后更新于–，最新版本（0.23.0）于7天前进入注册中心。

哪些应用可以使用它？

支持 MCP 的应用，例如 Claude Desktop、Claude Code、Cursor 和 VS Code。它通过 URL 连接，所以接受远程 MCP 服务器的应用也可以使用，例如开启开发者模式的 ChatGPT。

有什么可以替代它？

同一分类中有：Finance Toolkit, SolidInvoice, Korea Tax Calculator

替代选择

同一分类中其他作者的服务器，按星标数排序。

如何看卡片：↓ 每周下载量i★ GitHub 星标i三大支柱：评价 · 检查 · 使用情况i更新 = 最新版本发布到注册中心的时间i

Finance Toolkit

500+ transparent financial methods calculated from raw statements, not third-party endpoints.

作者：JerBouma广泛使用↓ 1.6万/周★ 54963天前更新

电脑或云端

安装

SolidInvoice

Create and send invoices and quotes, manage clients, and track payments in SolidInvoice.

作者：SolidInvoice正在增长★ 981今天更新

在云端运行✓ solidinvoice.co

安装

Korea Tax Calculator

Korean tax calculation and tax-audit judgment MCP: 97 tools with statutory citations.

作者：UpstageAI正在增长↓ 3172/周★ 97今天更新

在你的电脑上运行

安装

作者的 README

打开 README

按原文从作者的仓库复制。PopNx MCP 没有审查或背书其内容。HTML、图片和脚本已被移除。链接会离开本站。

Automated payment reminders for overdue invoices

In the [official MCP Registry](https://registry.modelcontextprotocol.io/v0.1/servers/io.github.theluckystrike%2Fdunning-letters/versions/latest) (io.github.theluckystrike/dunning-letters). Chase overdue invoices without losing the thread. Register an unpaid invoice, client, invoice reference, amount in integer cents, currency, due date, and the server runs the escalation ladder: reminder 1 (polite, due + 7 days), reminder 2 (firm, with the late fees note, due + 14), and the final notice (before-action wording, due + 21; the gaps are configurable per invoice). For each stage it generates the letter, as Markdown or as a self-contained printable HTML page. It records what you sent and when, lists everything overdue with days late and stage, ages the whole register into current/30/60/90+ buckets, and answers "what do I need to send today". Nothing is emailed or sent anywhere: this server produces the letter text, and sending it is your act.

Built by theluckystrike.

npm publish for @theluckystrike/mcp-dunning-letters is pending, so npx -y @theluckystrike/mcp-dunning-letters returns 404 today. Until then, a clone+build is the working path.

Install

Claude Desktop

macOS ~/Library/Application Support/Claude/claude_desktop_config.json, Windows %APPDATA%\Claude\claude_desktop_config.json:

"mcpServers": { "dunning-letters": { "command": "npx", "args": ["-y", "@theluckystrike/mcp-dunning-letters"] } } }

Claude Code

claude mcp add dunning-letters -- npx -y @theluckystrike/mcp-dunning-letters

Cursor

~/.cursor/mcp.json (global) or .cursor/mcp.json (project), same entry as Claude Desktop.

Tools

tool	what it does
`invoice_register`	Start chasing an unpaid invoice: client, reference, amount, currency, due date. Returns `DUN-YYYY-NNNN` and the three escalation dates
`payment_record`	Record money received, full or partial. A part payment lowers what the next letter asks for; covering the balance closes the ladder
`letter_render`	Generate the chase letter for the current stage -- reminder 1, reminder 2 or the final notice -- as Markdown or self-contained printable HTML. Nothing is emailed: you send the text it produces
`letter_sent`	Record that a letter actually went out, with its date, so the ladder advances. Letters go out in order
`overdue_list`	Every unpaid invoice past its due date: days late, outstanding, letters sent, what is due next, worst first
`aging_summary`	The whole register in current/1-30/31-60/61-90/91+ buckets, counts and totals in integer cents, per currency
`chase_today`	The day's chase list: which invoices cross an escalation threshold today, which letter to send each, what falls due next
`invoice_status`	One chased invoice in full: payments, letters, schedule, next action
`invoice_delete`	Delete an invoice entered wrongly. The id is not reissued
`license_status` / `license_activate`	Free or Pro, and the key

Free vs Pro

	Free	Pro
Unpaid invoices chased at once	3	Unlimited
All three letters, both formats	Yes	Yes
Aging summary and the day's chase list	Yes	Yes
Late fee accrual in the letters	Yes	Yes
Payment recording and history	Yes	Yes

The cap is on how many chases run at once, never on the letters or the aging: three late payers taken from first reminder to final notice is a real chase list, and an invoice that gets paid frees its slot. What is metered is breadth, a fourth concurrent chase is a collections workload, not a freelancer's month.

Get Pro: https://mcp.zovo.one/buy/dunning-letters, $19 one-time for this server, or $39 for the bundle.

A measured insight

The ladder is anchored to the due date, not to the last letter, and the two drift apart exactly when chasing is going badly.

The worked chase in test/_client.mjs: USD 1,250.00 due 2026-06-01, gaps 7/14/21, so the letters fall due on 06-08, 06-15 and 06-22 whether or not anything was sent. If reminder 1 actually goes out late, say 06-20, twelve days after its date, a previous-letter-anchored ladder would push the final notice to 07-11. This one does not: 06-22 stands, because the client's obligation was fixed by the due date, not by when you got around to writing. Recording a sending moves only which stage is next; it never moves the schedule. The letters are also strictly sequential: an invoice 60 days late with nothing sent is still owed reminder 1, because a final notice that no polite letter preceded reads as a threat, not a chase.

The late fee is measured the same way, once: simple interest, pro-rata on a 30-day month, on the amount outstanding on the day the letter is written, rounded once to the minor unit. On the worked chase that is 125,000 minor units at 2% over 30 days late, 2,500 exactly, and after a 50,000 part payment it is 1,500 on the 75,000 that remains, so the final notice asks for 76,500 and no invented figure more.

Privacy

All data stays local, in ${XDG_DATA_HOME:-~/.local/share}/mcp-servers/dunning-letters/. Two files: invoices.json, counter.json. Nothing is sent anywhere, no account, no API key, no network call in this server at all, and the letters are rendered to text for you to send yourself; this server holds no mail credentials and wants none. License keys are verified offline.

Built by theluckystrike. https://github.com/theluckystrike

Frequently asked questions

Is there an MCP server for payment reminders or dunning letters?

Yes. The dunning-letters server at mcp.zovo.one automates accounts-receivable follow-up: tiered reminder sequences (friendly, firm, final), printable PDF letters, per-customer aging. Free tier, hosted remote endpoint.

How do I send payment reminders from Claude?

Connect https://mcp.zovo.one/mcp/dunning-letters and say: 'List overdue invoices and draft a firm reminder for Acme.' The letter follows the standard tier sequence and exports as PDF.

Use these docs as an MCP server

Any MCP client (Claude, Cursor, Windsurf, VS Code) can read this repository's documentation directly via GitMCP - no install:

Docs MCP URL: https://gitmcp.io/theluckystrike/mcp-dunning-letters