ProofCheck for Grok
io.github.something-agent/proofcheck
Free x402 offer/receipt checker: verifies signatures and whether the signer fits the host.
client:Grok
transport:streamable-http
tools:5
Install ProofCheck in Grok
.mcp.json (in your project root)
{
"mcpServers": {
"proofcheck": {
"type": "http",
"url": "https://proofcheck.something-agent.workers.dev/mcp"
}
}
}Grok Build reads Claude Code's .mcp.json and Claude Desktop's config unchanged, so a server you have already set up there needs nothing new. The Grok web app and X integration do not take custom servers. Grok docs