Put a wallet in front of any x402-paid MCP server. A local stdio MCP server that holds the key, pays per call, and proxies your existing client through — so a stock MCP client can buy from a metered endpoint with one config entry.
Source: <https://github.com/zeam-labs/x402-mcp-bridge>. Tarball and checksum: <https://www.zeamprism.com/x402-mcp-bridge.tgz> · <https://www.zeamprism.com/x402-mcp-bridge.tgz.sha256> The tarball is built from this source at the tagged version, and the checksum above is of that build — verify it before you run anything.