InvoiceIn for Grok
io.github.peculiar-systems/invoicein
XRechnung, Factur-X, Peppol, PINT AE, FatturaPA, KSeF → JSON + fix hints. Hosted; MIT=examples only
client:Grok
transport:streamable-http
tools:5
Install InvoiceIn in Grok
.mcp.json (in your project root)
{
"mcpServers": {
"invoicein": {
"type": "http",
"url": "https://invoicein-api.peculiar.systems/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