com.frontiercrown.signer/nostr-signer

up checked 2026-11-11T09:38:07.697Z

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Publisher-provided title

Nostr Signer

Publisher-provided description

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

Summary by lookupd

Lets an agent prepare, review, and sign Nostr events via a user-controlled signer, plus Grynvault invoices and dashboard reads.

Install

Claude Code, remote (streamable-http)

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

Codex, remote (streamable-http)

codex mcp add nostr-signer --url https://signer.frontiercrown.com/mcp

Cursor, remote (streamable-http) → .cursor/mcp.json

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

Other clients: docs. Or tell your agent: Set up lookupd for me: read https://lookupd.com/agent.md and follow it.

Tools (17 tools)

Publisher-provided text

• 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 nse
• 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 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 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
• 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,
• 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 si
• 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
• 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, o
• 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

Details

• Version: 0.4.0
• Transports: streamable-http
• Uptime (7 days): 100%
• Median latency: 386 ms
• First indexed: 2026-11-01T08:54:08.041Z
• Last seen in registry: 2026-11-01T08:54:08.041Z
• Repository: https://github.com/hudhaifahz/nostr-signer-chatgpt

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