Is io.github.NarwhalThePong/seller-fees-mcp safe to use?

io.github.NarwhalThePong/seller-fees-mcp has no known CVEs as of the latest MCPpedia security scan. Authentication requirements were not detected automatically - check the project's documentation before connecting in a shared environment. Licensed under MIT.

How do I install io.github.NarwhalThePong/seller-fees-mcp?

io.github.NarwhalThePong/seller-fees-mcp supports copy-paste install configs on its MCPpedia page for Claude Desktop, Cursor, and Claude Code. Scroll to the Quick Install section and select your client.

What AI clients work with io.github.NarwhalThePong/seller-fees-mcp?

io.github.NarwhalThePong/seller-fees-mcp is compatible with claude-desktop, cursor, claude-code. It uses stdio and http transport.

Is io.github.NarwhalThePong/seller-fees-mcp actively maintained?

io.github.NarwhalThePong/seller-fees-mcp is actively maintained - last commit was 16 days ago.

io.github.NarwhalThePong/seller-fees-mcp

seller-fees-mcp

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

103/wk GitHub npm

No known CVEs

MIT license

Actively maintained

Last commit 16d ago

Works with most clients

Transport: stdio, http

0 tools

Grade F

MCPpedia last refreshed this data 2d ago

Edit this pageView history

io.github.NarwhalThePong/seller-fees-mcp is an MCP server that gumroad, Stripe, PayPal and Etsy seller fees, payouts and break-even prices. Local, no API key. Its tool list has not been published yet over stdio and http, requires no API key, and scores 59/100 on MCPpedia's security, maintenance and efficiency rubric.

Finance

Step 1

Install in your client

Config is the same across clients - only the file and path differ.

Supported in Claude Desktopstdio, http · Node 18+

Paste into ~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "seller-fees": {
      "args": [
        "-y",
        "seller-fees-mcp"
      ],
      "command": "npx"
    }
  }
}

Are you the author?

Add this badge to your README to show your security score and help users find safe servers.

Embed in your READMEAbout badges →

[![MCPpedia Score](https://mcppedia.org/api/badge/io-github-narwhalthepong-seller-fees-mcp)](https://mcppedia.org/s/io-github-narwhalthepong-seller-fees-mcp)

Read me

What io.github.NarwhalThePong/seller-fees-mcp does

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

Test This Server

Run this in your terminal to verify the server starts. Then let us know if it worked - your result helps other developers.

npx -y 'seller-fees-mcp' 2>&1 | head -1 && echo "✓ Server started successfully"

After testing, let us know if it worked:

Loading README…

Scored, not listed

Why this score

Five weighted categories - click any category to see the underlying evidence.

Score breakdown

59/100across 5 weighted dimensions

How we score →

0255075100

−41

Security

Maintenance

Efficiency

Documentation

Compatibility

Categoriesclick a row to see evidence

Security

OSV.dev

No known CVEs.

Checked seller-fees-mcp against OSV.dev.

Community

Reviews

Be the first to review

Have you used this server?

Share your experience - it helps other developers decide.

How easy was setup?Did it work reliably?How was the documentation?

Frequently Asked Questions

Is io.github.NarwhalThePong/seller-fees-mcp safe to use?: io.github.NarwhalThePong/seller-fees-mcp has no known CVEs as of the latest MCPpedia security scan. Authentication requirements were not detected automatically - check the project's documentation before connecting in a shared environment. Licensed under MIT.
How do I install io.github.NarwhalThePong/seller-fees-mcp?: io.github.NarwhalThePong/seller-fees-mcp supports copy-paste install configs on its MCPpedia page for Claude Desktop, Cursor, and Claude Code. Scroll to the Quick Install section and select your client.
What AI clients work with io.github.NarwhalThePong/seller-fees-mcp?: io.github.NarwhalThePong/seller-fees-mcp is compatible with claude-desktop, cursor, claude-code. It uses stdio and http transport.
Is io.github.NarwhalThePong/seller-fees-mcp actively maintained?: io.github.NarwhalThePong/seller-fees-mcp is actively maintained - last commit was 16 days ago.

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Community

Discussion

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Finance

Step 1

Install in your client

Config is the same across clients - only the file and path differ.

Supported in Claude Desktopstdio, http · Node 18+

Paste into ~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "seller-fees": {
      "args": [
        "-y",
        "seller-fees-mcp"
      ],
      "command": "npx"
    }
  }
}

Are you the author?

Add this badge to your README to show your security score and help users find safe servers.

Embed in your READMEAbout badges →

[![MCPpedia Score](https://mcppedia.org/api/badge/io-github-narwhalthepong-seller-fees-mcp)](https://mcppedia.org/s/io-github-narwhalthepong-seller-fees-mcp)

Read me

What io.github.NarwhalThePong/seller-fees-mcp does

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

Test This Server

Run this in your terminal to verify the server starts. Then let us know if it worked - your result helps other developers.

npx -y 'seller-fees-mcp' 2>&1 | head -1 && echo "✓ Server started successfully"

After testing, let us know if it worked:

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

npx -y seller-fees-mcp

From source

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

Desktop MCP clients

Add to your client's MCP config file:

{
  "mcpServers": {
    "seller-fees": { "command": "npx", "args": ["-y", "seller-fees-mcp"] }
  }
}

Cursor

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

{
  "mcpServers": {
    "seller-fees": { "command": "npx", "args": ["-y", "seller-fees-mcp"] }
  }
}

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).

License

MIT

Loading README…

Scored, not listed

Why this score

Five weighted categories - click any category to see the underlying evidence.

Score breakdown

59/100across 5 weighted dimensions

How we score →

0255075100

−41

Security

Maintenance

Efficiency

Documentation

Compatibility

Categoriesclick a row to see evidence

Security

OSV.dev

No known CVEs.

Checked seller-fees-mcp against OSV.dev.

Community

Reviews

Be the first to review

Have you used this server?

Share your experience - it helps other developers decide.

How easy was setup?Did it work reliably?How was the documentation?

Frequently Asked Questions

Is io.github.NarwhalThePong/seller-fees-mcp safe to use?: io.github.NarwhalThePong/seller-fees-mcp has no known CVEs as of the latest MCPpedia security scan. Authentication requirements were not detected automatically - check the project's documentation before connecting in a shared environment. Licensed under MIT.
How do I install io.github.NarwhalThePong/seller-fees-mcp?: io.github.NarwhalThePong/seller-fees-mcp supports copy-paste install configs on its MCPpedia page for Claude Desktop, Cursor, and Claude Code. Scroll to the Quick Install section and select your client.
What AI clients work with io.github.NarwhalThePong/seller-fees-mcp?: io.github.NarwhalThePong/seller-fees-mcp is compatible with claude-desktop, cursor, claude-code. It uses stdio and http transport.
Is io.github.NarwhalThePong/seller-fees-mcp actively maintained?: io.github.NarwhalThePong/seller-fees-mcp is actively maintained - last commit was 16 days ago.