"MCP servers that support SSE connections" matching MCP connectors:

CVSS Calculator MCP is a lightweight MCP server that enables AI agents to accurately calculate CVSS Base Scores and severity ratings. Supports CVSS 2.0, 3.0, 3.1, and 4.0 for vulnerability assessment, penetration testing, bug bounty hunting, and security reporting.

Check text before your agent reads it: hidden instructions, invisible text and links that leak data.

Profundis

io.profundis.mcp

Find subdomains and explore connections between websites through DNS, IPs, certificates and WHOIS data. Supports OAuth and API keys. Requires a paid Profundis plan or purchased credits.

Browser QA agent that won't return a false green: verified PASS/FAIL + access-control probing.