"Free tools or resources that do not require an API" matching MCP connectors:

Live internet-censorship signals and tamper-evident, pre-registered, hash-chained AI model evals.

Dedicated static outbound IPv4 over WireGuard. Free 7-day trial, no card, no sales call.

Read-only IT Health Check, domain security, recommendations, resources, and indicative pricing.

Monitoring for agencies — uptime, SSL, DNS, blocklists, AI visibility, MCP health. 8 no-auth tools.

Domain reputation over time: Domain Rating, Tranco rank, TLS, and AI crawler policy.

DNS and email security scanner with 80 MCP tools for SPF, DMARC, DNSSEC, SSL, and brand audits.

Domain & company intel for AI agents: RDAP, DNS, email deliverability, tech stack. No API keys.

DNS, WHOIS/RDAP, DMARC/SPF, LEI, sitemap, web extract, VAT, QR. Paid per call in USDC, no signup.

SecurityTrails MCP — wraps SecurityTrails API (securitytrails.com)

OpenCellID MCP — cell tower geolocation database (free with key)

IPInfo MCP — wraps ipinfo.io (free tier, no auth required for basic usage)

GreyNoise Community MCP — internet scanner classification (free tier with key)

The web capability layer for AI agents: render, extract, DNS, SSL, WHOIS & more via x402.

Shodan MCP — wraps the full Shodan REST API (api.shodan.io)

AbuseIPDB MCP — wraps AbuseIPDB v2 API (api.abuseipdb.com/api/v2)

Free anonymous website, DNS, email and TLS checks, plus read-only access to your monitors.

Internet identity for AI agents: register or broker domains, email, DNS - pay by card or USDC.

Domain attribution and correlation for AI agents, with confidence and per-signal evidence.

Custom domains API for SaaS: connect, verify, and manage customer domains, SSL, and DNS

Validate whether an IP address belongs to Bingbot. Remote MCP server exposing a validate_ip tool.