@signedapproval/mcp-server

MCP server for SignedApproval — cryptographic human-in-the-loop approval for AI agents.

Any AI agent can pause before a dangerous action, ask a human to approve it on their phone, and receive back an Ed25519-signed proof that a real human said yes. Unforgeably. Offline-verifiable.

One-command setup

npm install -g @signedapproval/mcp-server
signedapproval-mcp install --email [email protected]

Restart Claude Code or Cursor, then tell your AI: "Set up SignedApproval for me."

The AI calls signedapproval_login, a browser link opens, you sign in with Google — done. All 19 tools available instantly. No JSON editing, no dashboard required.

What the AI can do

Core approval flow:

• request_approval — create a request and block until the human decides
• check_approval — poll a specific request
• verify_approval — verify an Ed25519 signature offline

Account setup:

• list_api_keys, create_api_key, revoke_api_key
• get_preferences, update_preferences — quiet hours, default TTL
• get_usage, list_devices

Policies (reusable approval rules):

• list_policies, create_policy, update_policy, delete_policy

GitHub CI/CD:

• list_github_repos, configure_github_repo — auto-merge, quorum, branch protection

Audit & logging:

• get_audit_log
• list_log_sinks, create_log_sink, delete_log_sink — stream to Datadog/Splunk/SIEM

An AI with this MCP can fully onboard a new user, configure GitHub repos, create policies, and set up audit streaming — all from a single conversation.

Manual config

Add to ~/.claude/settings.json (Claude Code) or your Cursor MCP config:

{
  "mcpServers": {
    "signedapproval": {
      "command": "signedapproval-mcp",
      "env": { "SIGNEDAPPROVAL_EMAIL": "[email protected]" }
    }
  }
}

Or with an existing API key (skips the login flow):

{
  "mcpServers": {
    "signedapproval": {
      "command": "signedapproval-mcp",
      "env": { "SIGNEDAPPROVAL_API_KEY": "sa_live_..." }
    }
  }
}

Links

• Website: https://signedapproval.net
• API docs: https://signedapproval.net/llms-full.txt
• Sign up: https://signedapproval.net (Google OAuth)
• Issues: https://github.com/AlexFloyd13/signedapproval/issues

License

MIT — Floyd Media LLC