"The Guardian" matching MCP connectors:

Hosted, OAuth-gated endpoint for quantakrypto's post-quantum crypto tools: scan code for quantum-vulnerable cryptography (RSA/ECDH/ECDSA/DH) and get NIST ML-KEM/ML-DSA/SLH-DSA migration guidance over authenticated HTTP — nothing to install. Sign-in required (Google/GitHub/email). Same tools as the open-source @quantakrypto/mcp server; source at github.com/quantakrypto/pqc-tools.

Identity infrastructure for the AI economy. Confirms if someone is known; returns inferred traits.

The PropelAuth Integration MCP Server helps you and your favorite AI agent integrate PropelAuth as quickly and easily as possible into your project. Whether you're integrating PropelAuth into your Next.js project or your FastAPI backend, the Integration MCP Server will ensure your AI agent has the best context possible for a successful integration.

IOCs (URLs, domains, IPs, hashes) shared by the infosec community on X/Twitter. No auth, CC0.

Pre-signature x402 payment-risk oracle. AI agents call forecast_payment before paying a counterparty and get a GO / HOLD / STOP verdict from settlement reputation, price-anomaly (quoted vs the payee's own median), and OFAC sanctions screening — plus a third-party-verifiable Ed25519 signed receipt. Verdict only; never takes custody. Free under $10 at risk; returns an x402 payment challenge over that.

Read-only breach intelligence from public feeds: reports THAT a domain leaked, never the data.

The MCP server that vets MCP servers: identity, risk grade and per-tool risk before you install.

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

Human-in-the-loop approval for agent actions, with verifiable action-bound receipts.

Agent-to-agent channel (the Agora) + signed reliability verdicts + service commons. MCP + A2A.

Anchor a content-creation event to the Knox chain; returns a C2PA-aligned, FRE 902-shaped bundle.

Shodan MCP — wraps the full Shodan REST API (api.shodan.io)

Find the right security-disclosure contact for any internet asset (domain, IP, package, repo, app).

Enterprise code intelligence for M&A, security audits, and tech debt. Hosted server with 200k free.

Hosted MCP server for the Wavix telecom platform: SMS, voice, 2FA, SIP, numbers, 10DLC, CDRs.

IPQualityScore MCP — wraps the IPQualityScore fraud-prevention API

AML/CFT compliance oracle for the agent economy. Wallet screening against 12,997+ sanctioned crypto addresses, 1.1M+ entity search across OFAC/UN/EU sanctions, PEPs, Interpol, World Bank. 179-country jurisdiction risk scoring. Travel rule compliance. ERC-8004 Agent #27961 on Base.

NVD MCP — wraps the NIST National Vulnerability Database API (free, no auth)

Zero-value tracer token system that tracks AI agent activity across the internet. Agents earn tokens by submitting threat intelligence traces, with free trust verification (verify_trust) and paid threat intelligence feeds. 8 tools: submit_trace, check_token_balance, mutate_token, get_trace_schema, verify_trust (free) + threat_intelligence_feed, bulk_verify_trust, query_trace_analytics (paid).

Secure every MCP server with one governed gateway. Give each AI agent its own scoped MCP access, contain credentials at the gateway, and audit every MCP tool call without wiring agents directly to each server.