All servers · Payments & accounting

Nostr Signer

com.frontiercrown.signer/nostr-signer · v0.4.0

Measured by MCP Station

Description written by the publisher, not verified

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

Connect

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

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

Tools as reported by the server

• get_setup_url
  Return the loopback-only page used to connect a NIP-07 browser extension or an advanced NIP-46 signer.
• get_signer_status
  Check whether a user-controlled NIP-07 or NIP-46 signer is connected.
• begin_nostrconnect_pairing
  Advanced fallback: create a nostrconnect:// URI for the user to scan or open in a remote signer. Never accepts an nsec.
• connect_bunker
  Connect a bunker:// URI only when the user knowingly supplied it. Prefer the local setup page so connection secrets are not placed in chat. Never accepts an nsec.
• get_public_key
  Return the public key exposed by the currently paired signer.
• prepare_note
  Prepare and bind an exact unsigned kind:1 note for user review. This does not sign or publish.
• prepare_event
  Validate and bind an exact unsigned Nostr event for user review. This does not sign or publish. Show the user every field before requesting a signature.
• sign_event
  Ask the paired signer to approve and sign the exact event bound to a fresh intent. Requires explicit user intent and never publishes.
• publish_event write/delete
  Publish a previously verified signed event to configured relays. Requires separate explicit user intent.
• query_events
  Read a bounded set of verified public profile or note events from selected relays.
• disconnect_signer write/delete
  Forget the in-memory signer session and all prepared events.
• get_grynvault_account_dashboard
  Read the connected Nostr identity's Grynvault supporter, payment, and NIP-05 dashboard using a short-lived signed authorization. This does not create an invoice or change settlement.
• approve_grynvault_browser_handoff
  Sign a short-lived, read-only Grynvault account handoff code so the browser tab that created it can receive its own dashboard. This does not create an invoice, publish a Nostr event, change settlement, or grant wallet custody.
• prepare_grynvault_supporter_invoice
  Prepare an exact, short-lived signed-authorization request for a one-time donation of 21 to 1,000,000 sats or the fixed 2,100-sat 30-day membership. Does not sign, create, pay, or settle an invoice.
• create_grynvault_supporter_invoice
  After separate explicit user confirmation, sign the prepared authorization and create exactly one pending Grynvault supporter invoice. Does not pay it and never treats a redirect as settlement.
• prepare_grynvault_nip05_invoice
  Check and normalize a name@frontiercrown.com identifier, then prepare its exact 2,000-sat invoice authorization. Does not sign, reserve the name, create, pay, or settle an invoice.
• create_grynvault_nip05_invoice
  After separate explicit user confirmation, sign the prepared authorization and create exactly one pending 2,000-sat name@frontiercrown.com invoice. Does not pay, settle, activate, or prove identity.

Repository · JSON · Text for agents · Registry updated 2026-09-11