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Mostly Right

Official registry Data and databases

Search, sample and query open reproducible datasets published as immutable Parquet with schemas.

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 mostly-right 'https://mostlyright.md/api/mcp'
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "mostly-right": {
            "type": "http",
            "url": "https://mostlyright.md/api/mcp"
        }
    }
}

Frequently asked questions

What is Mostly Right?

Search, sample and query open reproducible datasets published as immutable Parquet with schemas.

How do I install Mostly Right?

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

Does Mostly Right 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 Mostly Right?

It is published by md.mostlyright. 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.