"Services or tools available for free without requiring an API key" matching MCP connectors:
GET /v1/connectors – MCP directory API referenceMatching Connector Tools:
VPN, proxy, Tor, hosting and CDN detection for any IP address, from the VPNDetection API.
External checks of TLS, HTTP, email domain, DNS, ports, blocklists and domain expiry
WHOIS, RDAP, DNS, IP / ASN / CIDR and Web3 name (ENS, Unstoppable, Handshake) lookups. No API key.
Check whether an IP address or network is malicious and report abusive IPs to isIPsafe.
Pay-per-GB residential, mobile and datacenter proxies: check traffic left and get proxy lines.
Connect custom domains via AI agents: DNS pre-flight checks, hand-off connect sessions and checks.
DNS hosting, secondary DNS and dynamic DNS paid per call in sats; optional Nostr account tools.
30 security tools for AI agents: phishing links, exposure maps, DNS, SSL, PQC, history, pivots.
Free MCP server of security & dev API tools -- supply-chain, CVE, DNS, WHOIS, OFAC, Cosmos SDK.
Deploy and operate Kubernetes: clusters, stacks, apps, logs, metrics and security, with OAuth.
Free SSL/TLS certificate checker: expiry, chain trust, hostname match, TLS version, A/B/C/F grade.
Official Porkbun MCP server: domains, DNS, SSL, hosting and Cloudflare via the Porkbun API.
Work, help and offers for autonomous AI agents and swarms; per-flow Base and Arc USDC.
Monitor websites, servers, domains and SSL with InfraNest, and ask your AI assistant what is down.
Is my broadband down? Live UK provider status and the last 30 days of outages
29 DNS, SEO, SSL, security, WHOIS & mail tools for AI agents. Pay per call (x402) or card API key.
Dedicated static outbound IPv4 over WireGuard. Free 7-day trial, no card, no sales call.
DNS and email security: check SPF, DKIM, DMARC, DNSSEC, DANE and build the records. 45 tools.
Search 55M+ expired domains, auctions, marketplaces & drops with SEO metrics, spam score and filters
Is it DNS? Audit a site or domain that isn't working: one call says if it resolves and why. No key.
Propagation breaker: egress quarantine + fingerprint outbreak telemetry for fleets.
Find lookalike domains of a brand's website: typos, swapped letters, look-alike characters, added words and other TLDs. Shows which of them resolve in DNS and what their front page shows. One read-only tool, no sign-up. Registry name: com.openbait/lookalike-domains. Web version: https://openbait.com/tools/typosquat-check
Manage your Squish domains, DNS, hosting, backups and site files from your AI assistant.
USDC/USDT domain registrar on 7 chains, card checkout for people, expiring drops, WHOIS/DNS tools.
Check a domain's email DNS, whether Gmail and Outlook accept its mail, and its registration.
UniFi quotes, case studies and network, camera, access config guides from a nationwide integrator.
Secure P2P File Transfer, Encrypted Chat & Communication | Decentralized P2P & AES-256-GCM encryption | Zero cloud logs. Zero registration. For humans and autonomous AI agents / MCP servers.
Free email deliverability tools: SPF, DKIM, DMARC, blacklist and header checks, cold email scoring.
Domain and email trust checks for agents: DNS, SPF/DMARC, disposable email. By Crypto Money Maker
Find the cheapest or best-value VPS for a given spec (vCPU, RAM, storage, budget, Seoul region) across 40+ providers and 300+ no-commitment monthly plans, compare providers head to head, and compare domain registration and renewal costs over 1-5 years. Prices are read daily from official pricing pages and ranked by a value index (vCPU/RAM/storage per pre-tax USD). Read-only, no auth. Data and docs: https://ssanvps.com/api/
