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Paypay MCP server

by mrslbt·io.github.mrslbt/paypay-mcp·v0.2.1
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PayPay QR payments for AI agents: QR codes, status, refunds, cancels. Bilingual JP/EN.

A88/100grade A
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Safety scan
A88/100

full report

Adoption
New

0 stars44 downloads/wk

Reviews

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Nobody has reviewed Paypay yet.

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

Paypay tools

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

Public scan report

scanner v0.1.9 · 2026-09-23 · same rubric, same numbers if you re-run it

no findings
  • Code scan39 source files scanned25/25
  • –Live reliabilityno gateway calls yet and no remote to proben/a
  • –Tool poisoningtools not inspected (local package is not executed); not countedn/a
  • Auth qualitylocal package, no credentials required12/15
  • Maintenancelast push 42 days ago12/15
  • Maintainer identityregistry namespace matches repository owner; GitHub account older than a year8/10
Overall 88/100. Components that don't apply are left out of the denominator. Any critical finding is an F.RubricAppeal a findingJSON

What the publisher says

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

paypay-mcp

Model Context Protocol server for the PayPay Open Payment API.

Works with Claude Desktop, Claude Code, Cursor, Windsurf, Zed, ChatGPT Apps SDK, and any other MCP-compatible client. Tool descriptions are provided in English and Japanese.

Status

v0.2.x — production-capable, not yet battle-tested at scale.

The server runs cleanly against PayPay's production Open Payment API once PAYPAY_ENV=production is set with approved merchant credentials. It has not yet processed meaningful real-world volume. If you are routing real payments through it, pin the version and review the source first.

Tools

Prompts

acceptsinglepayment, refundlastpayment, debugstuckpayment.

Resources

Install

One-click:

Or via npm:

npm install -g paypay-mcp

Configuration

Credentials come from the PayPay Developer Dashboard.

Claude Desktop

Edit ~/Library/Application Support/Claude/claudedesktopconfig.json:

{
  "mcpServers": {
    "paypay": {
      "command": "npx",
      "args": ["-y", "paypay-mcp"],
      "env": {
        "PAYPAY_API_KEY": "a_...",
        "PAYPAY_API_SECRET": "...",
        "PAYPAY_MERCHANT_ID": "...",
        "PAYPAY_ENV": "sandbox"
      }
    }
  }
}

Shortened. The full README is on GitHub.

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

Install directly

Runs npx -y paypay-mcp on your machine. Read the scan report first; the gateway never runs local packages.

claude mcp add paypay-mcp -- npx -y paypay-mcp
Add to Cursor

Paypay: common questions

Is Paypay MCP server safe?
Yes, by our scan: it is graded A (88/100). Read the Paypay safety report
How do I install Paypay?
It runs on your machine. Copy the Claude Code, Claude Desktop or Cursor config from the install section.
Does Paypay need an API key?
Not as far as the registry entry and our scan can tell: no credentials are declared or required.
Is Paypay maintained?
The last commit was 43 days ago (2026-08-12). The latest release is v0.2.1.

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