paypay-mcp

MCP server for the PayPay Open Payment API. Create QR codes, check payments, refunds, and cancellations. Tools documented in English and Japanese.

→ mrslbt/paypay-mcp · listed on github_topic

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// key findings

🚨

Known vulnerabilities in dependencies: 2 critical

Affects packages this MCP installs at runtime. Upgrade or remove the affected dependency.

🔐

You'll be asked for 3 credentials: MCP_AUTH_TOKEN, PAYPAY_API_KEY, PAYPAY_API_SECRET

These are read from process.env at runtime. Make sure you trust where they’ll be sent.

// known CVEs in dependencies2 critical

Disclosed vulnerabilities in this server's declared npm dependencies (via OSV). Whether each is reachable depends on the installed versions.

criticalvitest@2.1.8GHSA-5xrq-8626-4rwp

When Vitest UI server is listening, arbitrary file can be read and executed

criticalvitest@2.1.8GHSA-9crc-q9x8-hgqq

Vitest allows Remote Code Execution when accessing a malicious website while Vitest API server is listening

Depend on this server? Get alerted when its CVEs change.Watch this server free →

// required environment variables

This server reads these from process.env. You'll be asked to provide them before it can run.

🔐 secretMCP_AUTH_TOKEN— MCP_HTTP_HOST no Bind address. Default 127.0.0.1. Public binds require .

configMCP_HTTP_ALLOWED_ORIGINS— no Comma-separated CORS allowlist. Default: none.

configMCP_HTTP_HOST— no Bind address. Default 127.0.0.1. Public binds require MCP_AUTH_TOKEN.

configMCP_HTTP_PORT— no Port when MCP_TRANSPORT=http. Default 3000.

configMCP_TRANSPORT— no stdio (default) or http

🔐 secretPAYPAY_API_KEY— yes OPA API Key ID

🔐 secretPAYPAY_API_SECRET— yes OPA API Key Secret

configPAYPAY_ENABLE_CANCELS— cancel_payment Cancel a payment when its state is unclear (timeout or error). Disabled unless =true.

configPAYPAY_ENABLE_REFUNDS— refund_payment Full or partial refund. Disabled unless =true.

configPAYPAY_ENV— no sandbox (default) or production

configPAYPAY_MCP_DEBUG

configPAYPAY_MERCHANT_ID— yes Merchant ID

// full audit trail

The full breakdown of what we checked, the deductions that landed, the network hosts, the dependency advisories, and concrete fix guidance is available to verified publishers.

// improvement guidance — verified publishers only

We have 1 concrete improvement we can share with the publisher of this MCP. Each comes with specific guidance to raise the trust score.

// embed badge in your README

[![M8ven Score](https://m8ven.ai/badge/mcp/mrslbt-paypay-mcp-1kz6ln)](https://m8ven.ai/mcp/mrslbt-paypay-mcp-1kz6ln)

commit: 0ee3ad90ccca034fca3e3e46741f4dc8731be04d

code hash: de84a4a70424267e89bf7466414bbb90d429f2bd8b366925a33fcb8c923653c6

verified: 6/14/2026, 11:30:55 AM

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