MCP Server Directory

ZeroKnowledge-Vault io.github.Evozim/zeroknowledge-vault

Zero-knowledge proof validator and cryptographic locker.

Domain security scanning for AI agents. A-F grades, 8 checks, fix snippets.

Guardian layer for AI agents: identity, secrets, audit via MCP.

AI agent security via MCP: C3 firewall, C4 immune system, C5 action guard, self-evolving prompts.

ArXiv io.github.guptaprakhariitr/arxiv-mcp

ArXiv preprint search, daily category digest, and author-collaborator graph.

Hail io.github.hail-hq/hail-mcp

Phone, SMS & email for AI agents — one remote MCP endpoint, OAuth login, zero install.

Booking Request com.bonissystems/booking-request

Self-authenticating booking-request receipt anchored to the Knox chain; never represents a person.

MCP server for Obsidian vaults - AI tools with consistent canonical context. Local-first.

Google Calendar for AI agents — list/create/delete events and free-busy via OAuth token.

Security audit for AI agents — scan code/diffs for leaked secrets, check deps via OSV.

Jentic Remote MCP Server io.github.jentic/mcp-server

Remote MCP for 1,500+ APIs. Vault-managed credentials; OAuth or API key. Search, load, and execute.

AI agent security: 7 MCP tools for injection detection, PII scanning, command safety, DLP.

Scan websites for security vulnerabilities, headers, TLS, and email security.

hush com.royashbrook/hush

A secret store for AI agents: the agent never sees the plaintext.

MiOffice — AI-Powered Workspace Studio io.github.jsvvsolsllc/mioffice

125+ browser tools for PDF, Image, Video, Audio, AI, Scanner. Files never leave your device.

Zhiji Signal — Market Phase Detection com.run402.zhiji-signal/mcp

A-share HS300 phase signals via Landau-Ginzburg framework. No auth required.

Encrypted credential vault for AI agents — auto OAuth refresh, rate limiting, audit logging.

Analyzes code for bugs, security vulnerabilities, and code smells

Secret and credential management MCP — securely store, retrieve, manage API keys and tokens

Scan APIs for OWASP Top 10, LLM, and GraphQL security vulnerabilities.

auth-token-service io.github.mikerawsonnz/auth-token-service

Hash passwords with bcrypt and issue/verify JWT session tokens over A2A + MCP.

Storylayer Publishing io.github.mikeslone/storylayer

Hosted MCP for Instagram, Facebook, X, LinkedIn, Pinterest, and Ghost. OAuth 2.1, 38 tools.

Scan AI agents for tool-calling vulnerabilities: prompt leaks, hijacking, injections, and more.

Pre-build reality check. Scans GitHub, HN, npm, PyPI, Product Hunt — returns 0-100 signal.