io.github.UltraStarz/x402-sms

Is the io.github.UltraStarz/x402-sms MCP server down? No. It is up and needs env, probed 2026-10-30.

Pay-per-call MCP server. $0.03 USDC sends one transactional SMS to a US phone number via x402.

needs env probed 2026-11-15 · unchanged since 2026-10-30

MCP error -32000: Connection closed
x402-sms-mcp: BUYER_PRIVATE_KEY env var is required. Set a 0x... key for a wallet funded with Base Sepolia ETH (gas) and USD

Run it: npx -y x402-sms-mcp@0.1.0 (stdio, probed in a container with the network off)
Host: npmjs.com
Repository: https://github.com/UltraStarz/x402-sms-mcp
Registry: active, updated 2026-05-15 · registry entry

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Stops answering, comes back, tool set or cost changes. One confirmation mail first, a stop link in every mail.

For the publisher

The server exits because an environment variable is missing. The probe starts the package without secrets. A server that starts without secrets and asks for them on the first tool call is measured.