Mostly Right MCP Server: Install & Setup

Install Mostly Right in Claude Code

Claude Code

claude mcp add --transport http mostly-right https://mostlyright.md/api/mcp

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

{
  "mcpServers": {
    "mostly-right": {
      "url": "https://mostlyright.md/api/mcp"
    }
  }
}

Frequently asked questions

What does the Mostly Right MCP server do?

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

Is the Mostly Right MCP server free?

The server is free, but you will likely need an account. The server itself is free, but it connects to a service that needs an account or API key, which may have paid tiers. Check the provider for current pricing.

Does Mostly Right run locally or remotely?

Remote. Hosted by the provider. You connect with a URL, nothing to install.

How do I add Mostly Right to Claude Code?

Run: claude mcp add --transport http mostly-right https://mostlyright.md/api/mcp

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