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B4 Index

Official registry Developer tools

Independent build-vs-buy index: score software categories BUILD/BUY/BRIDGE/BEWARE.

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 b4-index 'https://b4-index.vercel.app/mcp' --header 'Authorization: <Optional. '\''Bearer <b4_... key>'\'' unlocks the Pro workflow tools (b4_audit, b4_compare, b4_recommend). The free tier (b4_browse, b4_score) needs no credentials.>'
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "b4-index": {
            "type": "http",
            "url": "https://b4-index.vercel.app/mcp",
            "headers": {
                "Authorization": "<Optional. 'Bearer <b4_... key>' unlocks the Pro workflow tools (b4_audit, b4_compare, b4_recommend). The free tier (b4_browse, b4_score) needs no credentials.>"
            }
        }
    }
}

Frequently asked questions

What is B4 Index?

Independent build-vs-buy index: score software categories BUILD/BUY/BRIDGE/BEWARE.

How do I install B4 Index?

It runs as a remote server. In Claude Code: claude mcp add --transport http b4-index 'https://b4-index.vercel.app/mcp' --header 'Authorization: <Optional. '\''Bearer <b4_... key>'\'' unlocks the Pro workflow tools (b4_audit, b4_compare, b4_recommend). The free tier (b4_browse, b4_score) needs no credentials.>'. For other clients, paste the JSON configuration from this page into their MCP settings.

Does B4 Index need an API key?

Yes. It expects Authorization, which you set in its configuration.

Who maintains B4 Index?

It is published by ai.benroberts. 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.