preflight402 for Grok
io.ironshell/preflight402
Trust verdict for an x402 payment endpoint: health, 402 handshake, price, proceed/caution/avoid.
client:Grok
transport:streamable-http
Install preflight402 in Grok
.mcp.json (in your project root)
{
"mcpServers": {
"preflight402": {
"type": "http",
"url": "https://preflight402.ironshell.io/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