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RedBison

Official registry Security

500+ free tools over MCP: dev, text and security utilities, 230+ calculators. No sign-up.

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 redbison 'https://mcp.redbison.dev'
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "redbison": {
            "type": "http",
            "url": "https://mcp.redbison.dev"
        }
    }
}

Frequently asked questions

What is RedBison?

500+ free tools over MCP: dev, text and security utilities, 230+ calculators. No sign-up.

How do I install RedBison?

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

Does RedBison 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 RedBison?

It is published by dev.redbison. 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.