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@finaegis/mcp

v0.1.6

Published

Stdio-to-remote relay for the Zelta MCP server. Lets stdio-only MCP clients (Claude Desktop, Cursor, Continue.dev) connect to https://mcp.zelta.app/mcp.

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@finaegis/mcp

Connect Claude Desktop, Cursor, or Continue.dev to Zelta via the Model Context Protocol.

First-time login

npx -y @finaegis/mcp --login

This prints an authorization URL to the terminal and (where possible) opens it in your browser. After you complete consent, the token is persisted and the wrapper exits. You can re-run --login at any time to refresh credentials.

Configure (Claude Desktop)

Once logged in, add to claude_desktop_config.json:

{
  "mcpServers": {
    "zelta": { "command": "npx", "args": ["-y", "@finaegis/mcp"] }
  }
}

Token storage

By default, tokens are stored in $XDG_CONFIG_HOME/finaegis-mcp/tokens.json (typically ~/.config/finaegis-mcp/tokens.json) with file permissions 0600 (read/write for the owning user only). The file is plain JSON, not encrypted at rest.

Optional: OS keychain backend. If you prefer macOS Keychain / Windows Credential Manager / Linux libsecret, install keytar globally and opt in:

npm i -g keytar
FINAEGIS_MCP_TOKEN_STORE=keychain npx -y @finaegis/mcp --login

keytar is not a dependency of this package — it's a native module that fails to install on common environments (WSL2, Docker, Alpine, CI). Keeping the default install pure JavaScript means npx -y @finaegis/mcp just works everywhere.

Environment overrides

| Variable | Default | |---|---| | MCP_SERVER_URL | https://mcp.zelta.app/mcp | | MCP_AUTH_SERVER | https://zelta.app | | MCP_OAUTH_NO_BROWSER | unset — set to 1 to print the auth URL instead of opening a browser | | FINAEGIS_MCP_TOKEN_STORE | file (default) — set to keychain to use the OS keychain via keytar (must be installed separately) |

Troubleshooting

  • Browser does not open — set MCP_OAUTH_NO_BROWSER=1 and follow the URL printed to stderr.
  • Token expired — log out and re-auth: npx @finaegis/mcp --logout.
  • libsecret-1.so.0: cannot open shared object file — only happens if you opted into FINAEGIS_MCP_TOKEN_STORE=keychain on a Linux system without libsecret. Unset the variable (the default file store needs no native deps) or install libsecret-1-dev + a keyring daemon.