scvd-mcp-starter

A zero-dependency MCP server over stdio that serves scvd.store's five free x402 verifier tools to any MCP client: preflight_x402_endpoint, verify_x402_receipt, lookup_endpoint_readiness, get_defect_definition, verify_scvd_artifact. It answers the handshake itself and forwards tools/list and tools/call to POST https://scvd.store/mcp/verifier over HTTPS. Nothing here can pay: the upstream door has no paid tool to reach, and this file holds no key and asks for nothing. Calls record traffic statistics upstream. Readiness lookups for eligible unprobed hosts publish their names in the asked-for queue for a later sweep.

npx scvd-mcp-starter

Claude Desktop, Cursor, or any stdio MCP client:

{ "mcpServers": { "scvd-verifier": { "command": "npx", "args": ["-y", "scvd-mcp-starter"] } } }

Why a starter

The whole server is one file. Copy it into your project, keep the handshake, and change SCVD_MCP_UPSTREAM (or the constant) to your own MCP door when you have one: the framing, the error shapes and the forwarding are the parts every stdio server needs and nobody wants to write twice.

What it is not

Not the store's full MCP door: that is https://scvd.store/mcp, which lists the paid shelf beside the free instruments. This starter reaches the verifier door only, on purpose, for a client that should never see a paid tool. Every answer names its checks and what it cannot tell you; never a ranking.

Versioning

Versions are immutable once published. Minor versions add methods and never change an existing answer's shape. The dated record is CHANGELOG.md.