402MCP.org — HTTP 402 & Agent Payment Registry for Grok
org.402mcp/registry
Decode HTTP 402 challenges (L402, x402, MPP) and choose agent payment rails from an open registry.
client:Grok
transport:streamable-http
runtime:npm
tools:7
Install 402MCP.org — HTTP 402 & Agent Payment Registry in Grok
.mcp.json (in your project root)
{
"mcpServers": {
"registry": {
"type": "http",
"url": "https://402mcp.org/api/v1/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