The full upstream README, mirrored here for reference. Install config, tool schemas, adoption signals, and an original overview live on the Air Quality Mcp listing page.
Hosted MCP servers on MCPize — zero-auth public APIs, freemium x402 (USDC on Base).
See CATALOG.md for the full list with gateway URLs.
Requires an x402-capable MCP client for paid tools. health_check and discovery tools are free.
See AWESOME_ENTRIES.md.