vault-mcp-server: what it is, how to install & alternatives

by hashicorp · MCP Server · ★ 65

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How to install vault-mcp-server

git clone https://github.com/hashicorp/vault-mcp-server.git
npx @modelcontextprotocol/inspector ./vault-mcp-server

Taken from the project's README on GitHub.

Security audit verdict: SAFE · quality 65/100

None of the 42 rules matched — no credential harvesting, no data exfiltration, no curl-pipe-shell installer. Scanned against 42 published rules built on the SlowMist agent-security taxonomy, refreshed every 8 hours.

The quality score combines nine heuristic checks of the repo and its README: completeness, clarity, specificity, examples, structure, agent readiness, step-by-step content, instruction quality and security notes. It rates how well the project explains itself to an agent, not the code.

doormat-managed

Quick Facts

Stars65
Forks26
LanguageGo
CategoryMCP Server
LicenseMPL-2.0
Quality Score65/100
Open Issues19
Last Updated2026-10-24
Created2025-06-19
Platformsgo, mcp
Est. Tokens~18k

About vault-mcp-server

Vault MCP Server The Vault MCP Server is a Model Context Protocol (MCP) server implementation that provides integration with HashiCorp Vault for managing secrets and mounts. This server uses both stdio and StreamableHTTP transports for MCP communication, making it compatible with Claude for Desktop and other MCP clients. Security Note: At this stage, the MCP server is intended for local use only.

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How this security grade is produced

Grades come from a rule-based scan built on the SlowMist agent-security taxonomy: 42 published rules, covering credential harvesting, data exfiltration, curl | sh installers and more. It is a first-layer scan, not a manual audit — we say so rather than overstate it.

The scale of the problem is documented independently: Liu et al. (2026), in a study of 31,132 agent skills, report that 26.1% contain security vulnerabilities. Our own full-catalog census is published as a citable open dataset.

Sources & who's responsible:

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