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mcp/harbor
Grok

B20 Check for Grok

com.b20check/b20check

Verify B20 tokens on Base: issuer powers, imposter detection, signed EIP-712 verdicts.

client:Grok transport:streamable-http runtime:npm tools:2

Install B20 Check in Grok

.mcp.json (in your project root) 

{
  "mcpServers": {
    "b20check": {
      "type": "http",
      "url": "https://b20check.com/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

What Grok can do once it is connected

B20 Check in other clients

B20 Check MCP server