Seller Fees Calculator

io.github.NarwhalThePong由 GitHub 账号 NarwhalThePong 发布v1.0.1更新于 Oct 29, 2026

Gumroad, Stripe, PayPal and Etsy seller fees, payouts and break-even prices. Local, no API key.

发布方自己的服务：Calculator Tools MCP

已验证STDIO仅桌面金融商业与电商

服务详情

标识符: io.github.NarwhalThePong/seller-fees-mcp
传输: STDIO
运行时: Desktop only
信任: Verified
发布于: Oct 29, 2026

安全提示

MCP 服务会接收对话中的工具调用请求，并可能执行外部操作。启用前请先了解该服务能做什么，并只授予它所需的权限。

注册中心已验证此条目所属的 GitHub 账号 NarwhalThePong。这并不表明该账号就是产品方。

SourceWeft 的检查只涵盖条目是否完整、端点是否响应；不审查服务器的代码，也不审查其工具的行为。

在 README 中添加徽章

向读者展示该 MCP 服务已收录于 SourceWeft，徽章链接到本页。

[![Listed on SourceWeft](https://sourceweft.com/badge/mcp/io.github.NarwhalThePong%2Fseller-fees-mcp.svg)](https://sourceweft.com/mcp/io.github.NarwhalThePong%2Fseller-fees-mcp?utm_source=readme&utm_medium=badge)

概览

AI 生成的概览

本地 MCP 服务器，用于计算 Gumroad、Stripe、PayPal 和 Etsy 的卖家手续费、实际到账金额与保本价格（美国卖家，美元）。

可以做什么: 计算 Gumroad、Stripe、PayPal 或 Etsy 单笔销售的手续费与净收入，支持 Discover、高销量、银行卡处理、国际交易、数量、运费、销售税和站外广告等平台选项
按销量计算每笔及总计的实际到账金额
反推在扣除手续费后仍能达到目标金额的最低定价
将同一价格在 Gumroad 直连、Gumroad Discover、Stripe、PayPal 和 Etsy 之间比较，按净收入从高到低排序
查询各平台的默认费率、可用选项和官方来源页面
适用场景: 适合通过 Gumroad、Stripe、PayPal 或 Etsy 销售数字或实物商品，并希望在制定价格时直接在助手内快速估算手续费、到账金额或保本价格的人。
运行要求: 以本地进程方式运行，可通过 npx 或源码启动，需要 Node.js 18 或更高版本。无需 API 密钥、账号或网络访问。

安装前请注意

结果仅为规划估算，不构成税务或会计建议；默认费率有截止日期，使用前应核对各平台当前定价页面。README 披露作者还销售相关付费产品（浏览器扩展和 Google 表格插件）并附有链接。

安装

在 SourceWeft 中

打开控制台中的 Seller Fees Calculator，将其添加到工作区。
为需要使用其工具的对话启用该服务。

Desktop only，通过 STDIO。 STDIO 服务会启动本地进程，因此需要 SourceWeft 桌面宿主。

其他 MCP 客户端

参照仓库中的启动说明。

README

seller-fees-mcp

A free Model Context Protocol (MCP) server that works out seller fees, payouts and break-even prices for Gumroad, Stripe, PayPal and Etsy (US sellers, USD). Everything runs locally: no API key, no account, no network calls.

Tools

Tool	What it does
`fee`	Fee and net for one sale. Gumroad direct includes the 2.9% + $0.30 card processing; options `discover`, `high_volume`, `processing` (`card`/`none`). PayPal `type` and `international`, Stripe `extra_pct`, Etsy `qty`, `shipping`, `sales_tax_pct`, `offsite_ads`.
`payout`	What you keep per sale and in total for `units` sales.
`price_for_target`	Lowest price that leaves at least `target` after fees.
`compare`	One price across Gumroad direct, Gumroad Discover, Stripe, PayPal (checkout, card, goods) and Etsy, best net first.
`platforms`	Default rates, options and official source pages.

Default rates are as of Oct 20, 2026. Gumroad direct: 10% + $0.50 plus card processing 2.9% + $0.30 (5% + $0.50 with high_volume); Discover: 30% all-in. Stripe: 2.9% + $0.30. PayPal Checkout: 3.49% + $0.49. Etsy: $0.20 listing, 6.5% transaction, 3% + $0.25 processing. Check each platform's pricing page before relying on a number. Planning estimates only; not tax or accounting advice.

Install

Requires Node.js 18 or newer.

npx

From source

bash

git clone https://github.com/NarwhalThePong/seller-fees-mcp.git && cd seller-fees-mcp && npm install && npm testnode src/server.js

git clone https://github.com/NarwhalThePong/seller-fees-mcp.git && cd seller-fees-mcp && npm install && npm testnode src/server.js

Desktop MCP clients

Add to your client's MCP config file:

Cursor

Add to ~/.cursor/mcp.json (or .cursor/mcp.json in a project):

For a local checkout, use "command": "node", "args": ["/path/to/seller-fees-mcp/src/server.js"].

Example

fee with { "platform": "gumroad", "amount": 19 } returns a fee of $3.25 ($2.40 Gumroad + $0.85 card processing) and a net of $15.75.

Prefer a web page?

Free Gumroad fee calculator: https://narwhalthepong.github.io/gumroad-license-check/gumroad-fee-calculator.html
Free PayPal and Stripe fee calculator: https://narwhalthepong.github.io/gumroad-license-check/paypal-stripe-fee-calculator.html
Free Etsy fee calculator: https://narwhalthepong.github.io/gumroad-license-check/etsy-fee-calculator.html
Creator Payout Calculator Pro (browser extension, paid): https://paudrudis.gumroad.com/l/ijrzbz

Disclosure: these are our own products. The calculator pages are free; Creator Payout Calculator Pro is a paid product we sell.

Prefer a spreadsheet?

Seller Fee Formulas for Google Sheets, $9: custom functions such as GUMROADFEE, STRIPEFEE, PAYPALFEE and ETSYFEE, plus price solvers for the price you need to keep a target amount, on a whole column at once. Our own paid product (the MCP server stays free).