"How to find the owner of a website" matching MCP connectors:

Read-only breach intel, full history 2007-today: reports THAT an org was breached, never the data.

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

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.

Is a wallet frozen by Tether/Circle? Free freeze checks + full history, screening & KYT. 9 chains.

Pay-per-call safety checks for AI agents: screen a crypto address or URL before you transact.

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.

Renamed to FactReason. Now published as io.github.factreason/factreason — please use that entry.

Email OS for agents - real-inbox search, triage, commitments, and a verifiable BEC hard-stop.

Free lockfile malware check plus paid pre-install scan of any skill, tool, or package.

MCP server teaching AI agents to implement TideCloak: auth, E2EE, IGA, security analysis

Free, no-account verification of KeyHalve-sealed documents. Read-only; never receives keys.

Score the privilege a Chrome MV3 extension takes from its manifest, and diff permission sets.

Query 90 days of honeypot probe data: IP reputation, scanners, CVE probing, TLS/SSH fingerprints.

Free MCP context preflight with local redaction and a paid HTTP upgrade.

JWT-gated LLM gateway: authenticate (bcrypt/JWT), then run a LangChain-on-Vertex Gemini completion.

Deterministic runtime enforcement of step order for AI agents: ALLOW/DENY before a step runs.

Scan a website for vulnerabilities: OWASP Top 10, CVEs, SSL, headers - with plain-English fixes

Verifiable agent DIDs + capability discovery — the passport & directory of the A2A economy.

Continuous website testing by Validoria — monitor security, SEO, performance, and accessibility.

Human-in-the-loop review and approval for AI agents. Audit trail, approval policies, native MCP.