Q402 — gasless USDC, USDT, and RLUSD payments across 8 EVM chains, callable from any MCP client.
npx -y @quackai/q402-mcp{
"Q402_API_KEY": "YOUR_SECRET_VALUE",
"Q402_PRIVATE_KEY": "YOUR_SECRET_VALUE",
"Q402_ENABLE_REAL_PAYMENTS": "0",
"Q402_MAX_AMOUNT_PER_CALL": "5",
"Q402_ALLOWED_RECIPIENTS": "YOUR_VALUE_HERE",
"Q402_RELAY_BASE_URL": "https://q402.quackai.ai/api"
}Add this server entry to the mcpServers object in your Claude Desktop config, then restart the app.
{
"mcpServers": {
"io-github-bitgett-q402-mcp": {
"command": "npx",
"args": [
"-y",
"@quackai/q402-mcp"
],
"env": {
"Q402_API_KEY": "YOUR_SECRET_VALUE",
"Q402_PRIVATE_KEY": "YOUR_SECRET_VALUE",
"Q402_ENABLE_REAL_PAYMENTS": "0",
"Q402_MAX_AMOUNT_PER_CALL": "5",
"Q402_ALLOWED_RECIPIENTS": "YOUR_VALUE_HERE",
"Q402_RELAY_BASE_URL": "https://q402.quackai.ai/api"
}
}
}
}~/Library/Application Support/Claude/claude_desktop_config.json%APPDATA%\Claude\claude_desktop_config.jsonNo remote HTTP endpoint is advertised. Use the package or stdio setup shown in Install.
q402-mcp is an MCP server for Q402 — gasless USDC, USDT, and RLUSD payments across 8 EVM chains, callable from any MCP client.. It supports STDIO transport.
Use the generated config in Install. This server runs with npx -y @quackai/q402-mcp; add any required environment variables before starting your client.
Choose the Claude Desktop tab in Install and copy the config for npx -y @quackai/q402-mcp. Add required environment variables before starting Claude Desktop.
Choose the Claude Code tab in Install and copy the config for npx -y @quackai/q402-mcp. Add required environment variables before starting Claude Code.
Choose the Codex tab in Install and copy the config for npx -y @quackai/q402-mcp. Add required environment variables before starting Codex.
Choose the Cursor or VS Code tab in Install and copy the config for npx -y @quackai/q402-mcp. Add required environment variables before starting Cursor or VS Code.
q402-mcp uses STDIO transport. Use the package or command config in Install.
q402-mcp inventory is listed when the MCP endpoint exposes tools, resources, or prompts. Some servers require auth first.
q402-mcp does not advertise a verified auth requirement. If discovery fails, it may still need provider login, an API key, a bearer token, or a session header.
| Package | Registry | Version | Inputs |
|---|---|---|---|
@quackai/q402-mcpstdio | npm | 0.4.2 | Env: Q402_API_KEY secret Env: Q402_PRIVATE_KEY secret Env: Q402_ENABLE_REAL_PAYMENTS Env: Q402_MAX_AMOUNT_PER_CALL Env: Q402_ALLOWED_RECIPIENTS Env: Q402_RELAY_BASE_URL |