"Services or tools available for free without requiring an API key" matching MCP connectors:
GET /v1/connectors — MCP directory API referenceMatching Connector Tools:
290+ quality-scored API capabilities for AI agents across 27 countries via MCP.
Website QA for your coding agent: audit SEO, performance, security, accessibility over MCP.
Accessibility and WCAG data for your own websites: fix lists, live checks, and fix validation.
Rights-aware censorship, China-economic status, and tamper-evident AI evaluation tools.
Uptime monitoring: create and manage HTTP, API, SSL, ping, port and domain checks
SSRF-safe web intelligence: 4 outcomes, 43 paid x402 tools, 3 free tools and a URL preview.
Independent health, price and history for x402/MPP endpoints. Metered over x402; free grade on web.
Read-only Amazon SES observability: search events, inspect bounces, pull delivery stats.
AI agent infrastructure: dedup, cost prediction, validation, governance, failure intelligence.
Vouch — independently measured reliability scores for MCP tools, not self-reported claims.
SupplyMaven supply chain risk management data including manufacturing, port and airport congestion, border, materials and macro indexes
Front desk for the AIS MCP campus: lists our buildings (CVE, Flight Recorder), prices, how to pay
Cookieless web analytics your coding agent reads: traffic answers, deploy impact, what broke. One connection covers every site on the account.
Measured latency, time to first token and uptime for ~45 AI inference APIs, by region.
Measured x402 ecosystem data, facilitator reliability, and live endpoint checks.
Vet any MCP server before you depend on it. Stamp: PASS, REVIEW, or BLOCK.
Dead-man's-switch for cron jobs & AI agents. Import a crontab to arm one silent-miss alert per job.
Free anonymous website, DNS, email and TLS checks, plus read-only access to your monitors.
Dead-man switch for AI agents & cron jobs: heartbeat with state capsule, alerts + resume links
Free uptime monitoring: HTTP/TCP/TLS/DNS + MCP server checks, cron heartbeats, status pages, alerts.
