stablevoy-mcp

An MCP server for Stablevoy, the non-custodial USDT and USDC payment gateway. Ask your AI assistant to bill a client, check whether an invoice is paid or sum up the week, across all your stores:

• "Bill Acme 250 dollars for the October work" gives a payment link.
• "Has Acme paid?" gives the status and the transactions.
• "What came in this week in the Main store?" gives the totals per network.
• "How do I verify a Stablevoy webhook in PHP?" answers from the documentation.

It works with Claude Desktop, Claude Code, Cursor and any client that speaks the Model Context Protocol. It runs on your computer and talks only to the Stablevoy API.

What it can and cannot do

The server holds store API keys only. With them it can create invoices to receive money, cancel unpaid ones, read your stores and invoices, sum up a period and list transfers that matched no invoice. It also searches the public Stablevoy documentation, which needs no key. It cannot move funds, change your payout address, your webhooks, your limits, your keys or your stores: those need your wallet signature in the Stablevoy dashboard. Stablevoy never holds your money, so there is nothing to withdraw.

So even an assistant tricked by a malicious web page or document can only create invoices that pay you, cancel an unpaid one (the buyer is told not to pay it and your shop gets the invoice.cancelled webhook), and read your invoices. Reading is the real exposure: invoice amounts and your references. Keep that in mind before you connect the server to an assistant that also reads untrusted content, or run it read-only (below).

Connect

Requires Node.js 22.12 or later.

npx stablevoy-mcp login

This opens the Stablevoy dashboard in your browser. Sign in with your wallet, tick the stores the assistant may use and approve. The browser hands a one-time code back to the command on this computer, which exchanges it for one API key per store and keeps them in your config folder (~/.config/stablevoy-mcp on Linux, ~/Library/Application Support/stablevoy-mcp on macOS, %APPDATA%\stablevoy-mcp on Windows), readable by you only. The keys are named "MCP (your computer)" on the store pages of the dashboard, where you can revoke any of them.

Then add the server to your client.

Claude Desktop (claude_desktop_config.json), Cursor (.cursor/mcp.json) and most clients:

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

Claude Code:

claude mcp add stablevoy -- npx -y stablevoy-mcp

One store without a login

Create a key on the store page of the dashboard and pass it instead:

{
  "mcpServers": {
    "stablevoy": { "command": "npx", "args": ["-y", "stablevoy-mcp"], "env": { "STABLEVOY_API_KEY": "sk_live_..." } }
  }
}

Without a key

With no login and no STABLEVOY_API_KEY the server still starts and lists every tool, prompt and resource, and tells the assistant it is not signed in. The store tools then answer not_signed_in with what to do, without calling the API; the documentation tools, the docs resources and the getting_started prompt work. Run npx stablevoy-mcp login to work with invoices.

Read-only

Add "STABLEVOY_MCP_READ_ONLY": "true" to env: create_invoice and cancel_invoice are then not offered at all.

Change the stores

• npx stablevoy-mcp login again: the stores this computer has are ticked; untick the ones to drop. Their keys are revoked, the new selection replaces the o

... View full README on GitHub