ProofCheck for VS Code

io.github.something-agent/proofcheck

Free x402 offer/receipt checker: verifies signatures and whether the signer fits the host.

client:VS Code transport:streamable-http tools:5

Install ProofCheck in VS Code

.vscode/mcp.json

{
  "servers": {
    "proofcheck": {
      "type": "http",
      "url": "https://proofcheck.something-agent.workers.dev/mcp"
    }
  }
}

Requires agent mode. MCP: Open User Configuration puts the same block in every workspace. VS Code docs