MCP Server Directory

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

Utility Matrix io.github.helphub369/utility-matrix

Free browser-based calculators and analyzers for cloud cost, DevOps, security, and data governance.

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

QuillCaddie MCP com.quillcaddie.www/mcp

OAuth-protected, read-only-by-default MCP server for provenance-labeled QuillCaddie project memory.

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.

shadowgate-mcp io.github.josephibra/shadowgate-mcp

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

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

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

MCP server for academic papers, citations, authors, ECOS dossiers, and Federal Register text.

Semantic search and AI context for your Obsidian vault. Surface patterns with catalysts.

BridgeGuard MCP Server - Cross-chain bridge security audit tools for AI coding agents. Scan bri...

VaultGuard MCP Server - Yearn V3 / DeFi vault security and analysis tools for AI coding agents....

Send Your Agent Website Readiness com.sendyouragent/readiness

Scan website AI readiness, understand the result and route customers to the right SYA package.

Security proxy that automatically wraps MCP servers with real-time monitoring and policy enforcement

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.

digest-mcp io.github.nexus-api-lab/digest-mcp

Exact hashing, base64/hex/URL encoding, JWT decoding and UUIDs for AI agents. No auth required.

Encrypt/decrypt Ethereum keystore JSON V3 with scrypt/PBKDF2 for secure cold storage

Analyze repos of any size - security scanning code analysis monorepo support

TLS Radar com.tlsradar/tlsradar

SSL/TLS scanning, free Let's Encrypt issuance, and certificate-expiry monitoring.

PageLens AI io.github.PageLens-AI/pagelensai-mcp-server

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

Post-quantum secrets manager for AI agents. ML-KEM-768 + X25519 + AES-256-GCM.

Search 200M+ papers, authors, citations, and recommendations via Semantic Scholar