"A tool or technique to improve prompt writing" matching MCP connectors:

Verify a skill, tool, or package for malicious behavior before your agent installs it. Hosted.

Post-quantum cryptography (PQC) vulnerability scanner. Detects ECDSA, RSA, AES-128 and other quantum-vulnerable algorithms in GitHub/GitLab/Bitbucket repos and Ethereum smart contracts. Returns risk score 0-100, CBOM (CycloneDX 1.6), and migration paths to NIST FIPS 203/204/205. Free tier: 10 scans/day, no key required.

Scan the open TCP ports of your own public IP. Fast (32) or deep (65535). No key, no signup.

Find known subdomains of a domain. Passive data; may include historic entries. List or count.

Security research: MCP registries verify identity, not tool behavior. See gtfo.dev.

Scan configs, files, or text for leaked secrets and obvious misconfigurations. Nothing stored.

Linux kernel CVE analyzer: upload a .config, get a CycloneDX VEX report of affecting CVEs.

Scan any website or MCP server for agent-trust-readiness; returns a signed, verifiable scorecard.

TLPTOracle — 17-tool TIBER-EU TLPT framework: scope, threat intel, scenarios, reports.

IaC attack-path auditor: finds internet-to-crown-jewel chains in Terraform/CFN/K8s.

Scan any URL, domain, or IP address for security threats using URLScanner.online. Returns a full security report including: Threat verdict (safe / suspicious / malicious) and 0–100 security score Threat intelligence across 70+ feeds (malware, phishing, blocklists) SSL certificate validity, expiry, issuer, and OCSP status HTTP security headers audit (missing / misconfigured) DNS records (A, AAAA, MX, TXT, NS, SOA) And More! Free to use. No account required. 10 scans/day

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

Hunt zero-days by talking to binaries. 40+ tools. Hosted, OAuth + SSO, invite: hi@byteray.ai

A paid remote MCP for developer endpoint scanner MCP, built to return verdicts, receipts, usage logs

Security scanner for MCP servers. Detect vulnerabilities, prompt injection, and tool poisoning.