KeePassHelper connects your browser to a KeePass-style password database so you can fill logins, generate secrets, and save new entries without copying and pasting. It also exposes an MCP server so coding agents can use the same vault through JSON-RPC tools.
Builders who want Chrome, Firefox, Opera, or Edge to use a KeePass vault for login work.
You can fill, generate, and save credentials from the browser without leaving your vault behind.
Matches saved logins from KeePass, MacPass, or KeePassXC and fills them into browser forms.
Creates secure passwords and passkeys while you are signing up or updating credentials.
Stores new credentials directly back into your password database.
Includes `v3/mcp/mcp.json` so agents can call the extension through defined JSON-RPC tools.
Works with Chrome, Opera, Edge, and Firefox.
An extension for Chrome, Opera, Edge, and Firefox that integrates with KeePass, MacPass, and KeePassXC to find and fill credentials, generate secure passwords and passkeys, and save new logins directly to your database—no manual copying required.
This extension can be used with coding agents such as OpenCode. Read FAQs page for more info. Also check the mcp.json (LLM tool definition) file which defines available tools for an agent, using JSON-RPC 2.0 as the envelope and JSON Schema for input/output.
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