MCP Server Directory

Tested financial & practical calculators as free, no-auth MCP tools for AI agents.

io.github.bolyra/shield

Stdio MCP auth proxy: wrap any MCP server with per-tool permission enforcement.

Sanction

Authorize an AI agent's spend & credential use before it acts — budgets, encrypted vault, audit.

httpcat

HTTP Cat MCP — wraps http.cat (free, no auth)

io.github.Evanciel/stellavault

Local-first MCP server: Claude searches, asks & drafts from your Obsidian vault. 21 tools, no keys.

Helixar Security

Security tools for AI agents: scan MCP servers, validate HDP delegation chains, audit releases.

Local-first security check for AI coding agents: secrets, .env exposure, git-history leaks, CVEs.

Remote MCP server bridging AI clients with the PowerDMARC email authentication Platform.

Guarded WhatsApp

Security gate for agent-driven WhatsApp: allowlist, secret scan, rate limit, audit log.

Gnosis Memory

Persistent memory and vector search for AI agents. Hosted, OAuth-protected via Google sign-in.

com.zeltser/website-search

Improve security writing, score it against rubrics, plan IR, CTI, vuln, and product strategy.

Security scanning and trust verification for AI agent tools.

io.github.rafavecchi/grantd

Grantd MCP server: let your AI agent act on a user's behalf across third-party APIs via OAuth.

io.github.RCOLKITT/vaspera-hardening

Enterprise certification for codebases with multi-agent security, reliability, and quality audits

Multi-workspace Slack MCP server with draft+confirm safety, vault auto-export, a

Multi-workspace Slack MCP server with draft+confirm safety, vault auto-export, and triple-mode…

HumanHours

Track agent ROI and enrich companies via MCP. Remote, OAuth 2.1, no install or keys.

PageLens AI

AI website audit: security, SEO, performance, UX and accessibility checks with actionable fixes.

SentinelGate

Open-source MCP proxy for AI agent access control with CEL policies, RBAC, and audit.

io.github.darknodebros/elesync

Local-first MCP memory vault: files you own, shared across ChatGPT, Claude, Gemini & any MCP client

Dockerfile Audit

Hadolint-grade Dockerfile audit — 19 checks: secrets, privileges, supply chain, hygiene.

io.github.sparkvibe-io/GuardianShield

AI security layer: code scanning, PII detection, prompt injection, secrets, CVEs

dadjokes

Dad Jokes MCP — wraps icanhazdadjoke.com (free, no auth)

io.github.josephibra/shadowgate-mcp

Security firewall for AI agents — scans MCP calls for injection, secrets, and risks.

noHumansShop

Affiliate marketplace for AI agents: find tools, publish verified guides, earn. OAuth, no keys.