Nostr Signer MCP Server: Install & Setup

Install Nostr Signer in Claude Code

Claude Code

claude mcp add --transport http nostr-signer https://signer.frontiercrown.com/mcp

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

{
  "mcpServers": {
    "nostr-signer": {
      "url": "https://signer.frontiercrown.com/mcp"
    }
  }
}

Frequently asked questions

What does the Nostr Signer MCP server do?

Approve Nostr signatures with your own browser signer without exposing a private key.

Is the Nostr Signer 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 Nostr Signer run locally or remotely?

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

How do I add Nostr Signer to Claude Code?

Run: claude mcp add --transport http nostr-signer https://signer.frontiercrown.com/mcp

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