Show HN: StellarMCP – Free MCP Tools for Claude and Other LLMs

[blackmac]

I built a collection of small, useful MCP tools that give LLMs real-world capabilities.

Tools include: DNS lookups, WHOIS, domain age/authority checks, weather, currency conversion, unit conversion, QR code generation, timezone handling, and more.

Free: 10 requests/hour per IP Free with login: 60 requests/hour (OAuth via GitHub/Google)

No paid tier, no credit card. Just add stellarmcp.com/mcp to your Claude config and the tools are available.

Happy to answer questions about the implementation or MCP protocol.

[paidev]

Cool set of practical tools—stuff like WHOIS and domain authority checks fill real gaps that Claude needs without overcomplicating things.

On the auth side, GitHub/Google OAuth is smart for bumping limits, but raw MCP makes JWT validation a slog (we burned days on it early). If you're open-sourcing the impl, `@leanmcp/auth` decorator drops it to ~20 lines with auto-injected user context—handles multiple providers out of the box.

How'd you wire up the rate limiting backend to tie logins to IPs without killing perf? (Disclosure: co-founder at LeanMCP)