"Using npx to run tools directly without requiring an API" matching MCP connectors:
GET /v1/connectors – MCP directory API referenceMatching Connector Tools:
Monitor CVEs, packages, domains and IPs. CVE/EPSS/KEV, SBOM, DNS/TLS, IP lookups. No key, x402.
External checks of TLS, HTTP, email domain, DNS, ports, blocklists and domain expiry
30 security tools + the Vigia agent to audit MCP servers before you connect.
The main MCP server has 10 tools, including six public, read-only CVE tools, site search and page reading. CVE results include source software/version evidence and available CISA KEV and dated FIRST EPSS data. The separate request_security_test action requires an agent key, consent and authorization. A no-account, read-only CVE-only endpoint is https://excessionlabs.ai/mcp/cve. Docs: https://excessionlabs.ai/cve-intelligence/.
Grade a page's HTTP security headers, search penetration testing guides and send a pentest request for a person. The read tools need no authentication; request_pentest needs a free agent key.
30 security tools + the Vigía agent to audit MCP servers for prompt injection, SSRF, leaked secrets, auth bypass and more — scan before you connect.
30 security tools for AI agents: phishing links, exposure maps, DNS, SSL, PQC, history, pivots.
Free email checks: 24 blacklists, spoofing grade, redirects, spam test, WHOIS, BIMI, AI readiness.
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.
Free passive outside security scan of a live web app: leaked keys, exposed files, open Supabase
Prompt-injection scanner for agents: risk score, categories and spans for text, pages, MCP tools
Queries live Google OSV.dev vulnerability intelligence for any PyPI, npm, Go, or Rust crate and re
Fetches a public http(s) URL (GET, up to 5 redirects, 10s timeout, body never read) and grades its security headers A+ to F: score, present and missing headers (HSTS, CSP, X-Frame-Options, Referrer-Policy, Permissions-Policy), per-header findings with copy-paste fix values, and cookie flag issues. Passive, SSRF-guarded. Pay-per-call via x402 ($0.01 USDC on Base); initialize and tools/list are free.
Check text before your agent reads it: hidden instructions, invisible text and links that leak data.
Scan a site or AI-built app for exposed databases, keys and MCP endpoints, then verify the fixes.
Inspects live IPv4/IPv6 DNS resolution, TLS certificate issuer/expiry, and HTTP security grade.
Security scans for AI-built web apps, starting with Lovable. Verify ownership, run authorized scans, inspect findings, get AI-ready fix prompts and request retests. Uses OAuth with a Guarita account. Fix prompt access follows the account plan.
Authorized security scans, evidence, fix prompts and retests for AI-built web apps.
Pay-per-call agent tools: PDF, OCR, translation, news search, prediction markets, web, chain reads.
Free AI test helpers: injection inputs, OWASP mapping, release plans, response and tool-call packs.
Production-safety audits for AI-generated code, with a fix for every finding.
Smart-contract security audits for EVM chains and DAML: quote, run and fetch reports.
Grades an MCP server's real egress: EVERY-HOP-VALIDATED, FIRST-HOP-ONLY, or OPEN-EGRESS.
Hosted, no-auth endpoint of feldspar-scan: free deterministic security scan of a public git repository (OSV.dev vulnerable dependencies, secret patterns, config lint) as structured JSON. Tools: scan_repository(url), audit_pricing(). Stateless streamable-HTTP JSON-RPC, rate-limited. Source: https://github.com/project-feldspar-resources/feldspar-scan (MIT). Operated by Feldspar, an autonomous AI agent (Project Feldspar).
AI Secret Scanner API is a FastAPI service for deterministic scanning of text, source code, logs, and configuration files. It detects hardcoded secrets, API keys, passwords, tokens, private keys, PII, and high-entropy suspicious strings.
Passive domain-perimeter checks — cert expiry, subdomain takeover, lookalikes — as agent tools
Argues against a security finding or a draft bug bounty report before you submit it.
Passive security check of a domain: headers, TLS, DNS and email authentication. No login needed.
Tells your coding agent whether your installed packages need patching, with advice on what to do.
Free CVE lookups, package checks and patch priorities from public sources. No account or API key.
Scan PDFs, Office docs, and RAG files for malware exploits, macros, CVEs, and AI prompt injection.
Free Slither scan of Solidity contracts for AI coding agents; optional paid report (1 USDC, x402).
Read AI security guides and lab research, and request an LLM or AI agent security assessment.
Review saved CyberLens website and repository scans through read-only OAuth tools.
CVEs, affected versions and fix versions for your dependencies, from an affected-version ledger.
Reputation + security findings (threatcrush.com)
Autonomous AppSec & DAST scanner across 12 security domains (260+ controls) with 3-Layer Triage.
Free CVE lookup, dependency vulnerability checks, and CVE updates. No signup or API key.
