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B20 Check

Official registry Security

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

Website

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

Remote (streamable-http)
Claude Code 
claude mcp add --transport http b20-check 'https://b20check.com/mcp'
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "b20-check": {
            "type": "http",
            "url": "https://b20check.com/mcp"
        }
    }
}
NPM package b20check-mcp
Claude Code 
claude mcp add b20-check -- npx -y b20check-mcp@0.1.1
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "b20-check": {
            "command": "npx",
            "args": [
                "-y",
                "b20check-mcp@0.1.1"
            ]
        }
    }
}

Frequently asked questions

What is B20 Check?

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

How do I install B20 Check?

It runs as a remote server. In Claude Code: claude mcp add --transport http b20-check 'https://b20check.com/mcp'. For other clients, paste the JSON configuration from this page into their MCP settings.

Does B20 Check need an API key?

Its registry entry lists no required key or secret. Some features may still need an account with the service it connects to.

Who maintains B20 Check?

It is published by com.b20check. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.