"Handshake" matching MCP servers:

Enables AI agents to list, retrieve, add, and audit credentials from an encrypted vault during an active human-unlocked session, while providing no tool to unlock the vault itself.

Autonomous synthetic health checks, JSON-RPC 2.0 handshake validation, breaking schema drift detection, and credential leak scanning for remote MCP servers.

Enables agents to validate email addresses through RFC 5321 syntax checks, MX record lookups, a 182,000-domain disposable blacklist, role-account detection, and an optional SMTP handshake. Runs locally via npx or as a hosted HTTP endpoint, returning explainable per-check scores at zero per-lookup API cost.

MCP server for SUSE NeuVector container security, exposing inventory, vulnerability, compliance, event, and policy data as 72 typed tools. Read-only by default, with optional mutating toolsets behind a confirmation handshake.

Enables an agent to find a business by phone number, check availability, book and cancel appointments, and verify business-signed receipts against a sandbox registry and demo shops that run locally over stdio. Every registry record and receipt is signature-checked, and nothing real is booked because the shops live inside the server process.

Enables independent Poke instances to discover each other's capabilities and exchange cryptographically signed, consented, idempotent messages and data through MCP tools, resources, and prompts. Provides handshake, message sending, data exchange, receipt retrieval, and capability listing with signature verification, policy enforcement, and signed error envelopes.

Enables agents to probe a live host's TLS handshake, read the actual SubjectPublicKeyInfo from the served certificate, and corroborate that exact key against Certificate Transparency logs to learn how long it has been harvestable. Exposes typed tools for ranking watches by urgency, recording triage decisions, replaying audit chains, and exporting OpenSSL migration configs, runbooks and sealed JSON dossiers.

A network analysis MCP server providing 23 tools for packet capture, protocol analysis, and cryptographic inspection, including TLS handshake, certificate extraction, and SM2/SM3/SM4 support.

Enables verifiable AI agent identity and reputation management on ICP via MCP, allowing agents to register, create handshake proofs, and verify credentials.