"namespace:io.github.wellknownmcp" matching MCP connectors:
Marketplace of pay-per-call APIs for AI agents. Top up once with USDC, then call any listed API - gasless, walletless, metered per request. Includes onboarded providers and hundreds of x402-native APIs discovered on-chain.
EPA AirNow MCP — official US real-time AQI + forecast (free key)
MoA document intelligence — multiple AI models cross-verify for 100% recall across 10 languages.
Alpha Vantage MCP — Stock market data, fundamentals, and earnings
Art Institute of Chicago MCP — wraps the ARTIC public API (free, no auth)
Agent-first skill marketplace with USK open standard for Claude, Cursor, Gemini, Codex CLI.
Mixture-of-Agents document intelligence engine. Multiple AI models cross-verify each other for 100% recall across 10 languages. 6 tools (analyze_document, extract_web, summarize, delegate_bulk_translate, estimate_cost, health_check). USDC pay-per-call on Base or Solana via x402. From $0.08/call.
AI service marketplace — agents discover, call, and pay for API services automatically.
AI Briefing MCP — Keep AI models current on industry developments
Agent-first skill marketplace with USK (Universal Skill Kit) open standard. Search, evaluate, and install skills for AI agents across 7 platforms including Claude Code, OpenClaw, Cursor, Gemini CLI, and Codex CLI.
ATTOM MCP — Premium real estate data from ATTOM Data Solutions
AgentGuard — 20-tool AI safety MCP: policy preflight, risk scoring, audit logging, rate limits.
Asana MCP — wraps the Asana REST API (OAuth)