kovra-mcp 0.1.3

Kovra MCP server — let your AI agents use your secrets without ever seeing them.

kovra-mcp

The agent-facing MCP server for kovra — exposes the scoped secrets surface (spec §9.4) to Claude Code over stdio. It is a thin FastMCP wrapper over the kovra_ffi PyO3 bindings; all policy lives in the Rust core, not here.

Tools

list · status · fingerprint · set · generate · delete · edit_metadata · reveal · inject_run

Reveal returns a value only for a secret explicitly marked revealable that is non-prod and non-high (I11); prod/high/inject-only are never returned to the model (I14). Out-of-scope coordinates are unaddressable (I13). There is no unattended-mode tool — real high/prod delivery routes through the CLI + kovra approve broker, which inject_run drives but the model cannot bypass.

Build & run

The server needs the kovra_ffi native module (built from ../crates/ffi-python by maturin). With uv:

cd mcp
uv sync                 # builds kovra-ffi via maturin + installs mcp
uv run kovra-mcp        # serve over stdio

Configuration

The vault and keyring come from the bindings' own env (KOVRA_VAULT_DIR, KOVRA_PASSPHRASE). The session scope is set at launch:

Variable	Default	Meaning
KOVRA_MCP_OPERATIONS	metadata,reveal,inject	Operation axes granted
KOVRA_MCP_ENVIRONMENTS	*	Addressable environments (* = any)
KOVRA_MCP_PROJECTS	*	Addressable projects (* = any)

The scope is a containment, not the security boundary — the core denies a prod/high reveal to an agent even when its environment is in scope.

Register with Claude Code

{
  "mcpServers": {
    "kovra": {
      "command": "uv",
      "args": ["run", "--directory", "/abs/path/to/kovra/mcp", "kovra-mcp"],
      "env": { "KOVRA_MCP_ENVIRONMENTS": "dev,test" }
    }
  }
}