~/Library/Application Support/Claude/claude_desktop_config.json%APPDATA%\Claude\claude_desktop_config.json~/.config/Claude/claude_desktop_config.json{
"mcpServers": {
"x402-sms": {
"command": "npx",
"args": [
"-y",
"x402-sms-mcp"
],
"env": {
"BUYER_PRIVATE_KEY": "0xYOUR_PRIVATE_KEY"
}
}
}
}