slonce.info.pl MCP server (Model Context Protocol, Streamable HTTP) Add https://slonce.info.pl/mcp as a custom connector in Claude or ChatGPT. Tools: sun_times, sun_calendar, moon_times, moon_phases, clock_change, solstice, find_city. No account or key is needed. More: https://slonce.info.pl/en/for-ai and https://slonce.info.pl/llms.txt