opgen MCP Server

What is opgen MCP Server?

opgen MCP Server is a Model Context Protocol (MCP) server implementation for password generation. It is based on 1Password’s opgen tool and automatically copies generated passwords to the clipboard. It is intended for use with MCP-compatible clients (e.g., AI assistants) that need programmatic password creation.

How to use opgen MCP Server?

Install it via go install github.com/syumai/opgen-mcp-server@latest, then configure it as a command in your MCP client’s settings. Two tools are provided: generate_password_characters (character-based passwords) and generate_password_words (word-based passwords). Both are invoked by the client after the server starts.

Key features of opgen MCP Server

• Generates passwords using characters or words
• Configurable password length, character sets, and exclusions
• Word-based generation with syllable or word lists
• Customizable word separators and capitalization schemes
• Generated password is copied directly to the clipboard

Use cases of opgen MCP Server

• AI assistants creating secure passwords on demand
• Automating password generation in developer workflows
• Generating strong, customizable passphrases in MCP tools
• Integrating with password managers via MCP

FAQ from opgen MCP Server

What character sets are available for character-based passwords?

uppercase, lowercase, digits, symbols, and ambiguous.

What options exist for word-based passwords?

You can choose the number of words, the word list (words or syllables), the separator (hyphen, space, comma, period, underscore, digit, none), and the capitalization scheme (none, first, all, random).

How do I install opgen MCP Server?

Run go install github.com/syumai/opgen-mcp-server@latest. You need a working Go installation.

Does the server require any external credentials or API keys?

No. It is a self-contained binary that runs locally and does not connect to external services.

What transport does it use?

The README implies standard MCP stdio transport (the server is executed as a subprocess of the client).