Pay-per-call MCP server. $0.03 USDC sends one transactional SMS to a US phone number via x402.
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npx -y x402-sms-mcp{
"BUYER_PRIVATE_KEY": "YOUR_SECRET_VALUE"
}Add this server entry to the mcpServers object in your Claude Desktop config, then restart the app.
{
"mcpServers": {
"io-github-ultrastarz-x402-sms": {
"command": "npx",
"args": [
"-y",
"x402-sms-mcp"
],
"env": {
"BUYER_PRIVATE_KEY": "YOUR_SECRET_VALUE"
}
}
}
}~/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.
x402-sms is an MCP server for Pay-per-call MCP server. $0.03 USDC sends one transactional SMS to a US phone number via x402.. It supports STDIO transport.
Use the generated config in Install. This server runs with npx -y x402-sms-mcp; add any required environment variables before starting your client.
Choose the Claude Desktop tab in Install and copy the config for npx -y x402-sms-mcp. Add required environment variables before starting Claude Desktop.
Choose the Claude Code tab in Install and copy the config for npx -y x402-sms-mcp. Add required environment variables before starting Claude Code.
Choose the Codex tab in Install and copy the config for npx -y x402-sms-mcp. Add required environment variables before starting Codex.
Choose the Cursor or VS Code tab in Install and copy the config for npx -y x402-sms-mcp. Add required environment variables before starting Cursor or VS Code.
x402-sms uses STDIO transport. Use the package or command config in Install.
x402-sms inventory is listed when the MCP endpoint exposes tools, resources, or prompts. Some servers require auth first.
x402-sms is marked with Auth required by registry metadata auth. You may need provider login, an API key, a bearer token, or a session header.
| Package | Registry | Version | Inputs |
|---|---|---|---|
x402-sms-mcpstdio | npm | 0.1.0 | Env: BUYER_PRIVATE_KEY required secret |