Connect

8 clients · secrets stay placeholders

JSON (mcpServers)Claude CodeCodexOpenCodeCursorVS CodeGemini CLIGoose

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

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

[mcp_servers.nostr-signer]
url = "https://signer.frontiercrown.com/mcp"

{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "nostr-signer": {
      "type": "remote",
      "url": "https://signer.frontiercrown.com/mcp",
      "enabled": true
    }
  }
}

{
  "mcpServers": {
    "nostr-signer": {
      "type": "http",
      "url": "https://signer.frontiercrown.com/mcp"
    }
  },
  "deeplink": "cursor://anysphere.cursor-deeplink/mcp/install?name=nostr-signer&config=eyJ0eXBlIjoiaHR0cCIsInVybCI6Imh0dHBzOi8vc2lnbmVyLmZyb250aWVyY3Jvd24uY29tL21jcCJ9"
}

{
  "servers": {
    "nostr-signer": {
      "type": "http",
      "url": "https://signer.frontiercrown.com/mcp"
    }
  }
}

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

extensions:
  "nostr-signer":
    enabled: true
    name: "nostr-signer"
    type: streamable_http
    uri: "https://signer.frontiercrown.com/mcp"
    timeout: 300

Quality 85 / 100good

protocol75 · weight 25

warn
protocol.modernnewest supported version is 2025-11-25; 2026-07-28 not supported, older versions are deprecated until 2027-07-28
n/a
protocol.statelessonly applies to 2026-07-28 servers
pass
protocol.transportstreamable HTTP
n/a
protocol.list_ttlonly applies to 2026-07-28 servers

authorizationn/a · weight 15

n/a
auth.prm, auth.as_metadata, auth.cimdno remote uses OAuth
n/a
auth.secret_in_urlno templated URL

tool hygiene86 · weight 30

pass
tools.descriptionsevery tool has a description
pass
tools.description_lengthdescriptions are concise
pass
tools.schemasevery tool has an object input schema
pass
tools.annotations17 of 17 tools declare readOnlyHint or destructiveHint
fail
tools.directory_hintsno tool declares all four of readOnlyHint, destructiveHint, idempotentHint and openWorldHint; missing: prepare_grynvault_supporter_invoice (idempotentHint); publish_event (idempotentHint); create_grynvault_supporter_invoice (idempotentHint); …
pass
tools.token_costabout 2,162 tokens to load every tool
pass
tools.api_dumptools are not a one-to-one API dump

stability100 · weight 15

pass
stability.changesno tool changes in 30 days
pass
stability.rug_pullno tool changed its meaning under the same name

dependenciesn/a · weight 15

n/a
deps.known_vulns, deps.mcp_sdk_version, deps.resolvableno npm or PyPI package

17 tools, about 2,162 tokens to load them all · tool set e61c4c6bf762 · checked 2026-10-21 01:38 UTC

Tool changes

No tool definition changes recorded. A server's first observation is its baseline; later probes record what changes.

Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed. How it is computed.

Trust 90 / 100

provenance75

liveness100

freshness85

hygiene100

+repository +dns-namespace +reachable +uptime-100% ~updated-40d-ago

Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed. How it is computed.

Endpoints

remote	auth	reachable	uptime 30d	p50	protocol	last ok
`https://signer.frontiercrown.com/mcp` streamable-http	none	yes	100%	326 ms	2025-11-25	2026-10-20

Tools (17)

`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.
`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.
`create_grynvault_nip05_invoice`	After separate explicit user confirmation, sign the prepared authorization and create exactly one pending 2,000-sat [email protected] invoice. Does not pay, settle, activate, or prove identity.
`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.
`disconnect_signer`destructive	Forget the in-memory signer session and all prepared events.
`get_grynvault_account_dashboard`read-only	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.
`get_public_key`read-only	Return the public key exposed by the currently paired signer.
`get_setup_url`read-only	Return the loopback-only page used to connect a NIP-07 browser extension or an advanced NIP-46 signer.
`get_signer_status`read-only	Check whether a user-controlled NIP-07 or NIP-46 signer is connected.
`prepare_event`read-only	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.
`prepare_grynvault_nip05_invoice`read-only	Check and normalize a [email protected] identifier, then prepare its exact 2,000-sat invoice authorization. Does not sign, reserve the name, create, pay, or settle an invoice.
`prepare_grynvault_supporter_invoice`read-only	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.
`prepare_note`read-only	Prepare and bind an exact unsigned kind:1 note for user review. This does not sign or publish.
`publish_event`destructive	Publish a previously verified signed event to configured relays. Requires separate explicit user intent.
`query_events`read-only	Read a bounded set of verified public profile or note events from selected relays.
`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.

Schemas: list_tools.

Similar MCP servers

Official server.json

{
  "name": "com.frontiercrown.signer/nostr-signer",
  "title": "Nostr Signer",
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
  "remotes": [
    {
      "url": "https://signer.frontiercrown.com/mcp",
      "type": "streamable-http"
    }
  ],
  "version": "0.4.0",
  "repository": {
    "url": "https://github.com/hudhaifahz/nostr-signer-chatgpt",
    "source": "github"
  },
  "description": "Approve Nostr signatures with your own browser signer without exposing a private key."
}