crosscheck for Grok
com.crosscheckapi/crosscheck
Checks for AI agents over x402: review drafts, accept-check handoffs, scan skills before install.
client:Grok
transport:stdio
runtime:npm
Install crosscheck in Grok
.mcp.json (in your project root)
{
"mcpServers": {
"crosscheck": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"crosscheckapi"
],
"env": {
"CROSSCHECK_WALLET_KEY": "<CROSSCHECK_WALLET_KEY>",
"CROSSCHECK_MAX_USD": "<CROSSCHECK_MAX_USD>",
"CROSSCHECK_NETWORKS": "<CROSSCHECK_NETWORKS>"
}
}
}
}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