mcp · Japan

MCP-Weather-Agent-with-LangChain

An agent-driven weather web application that wraps the OpenWeatherMap REST API behind a Model Context Protocol (MCP) server, uses a LangChain / LangGraph agent with Groq for tool calling, and exposes a Streamlit chat UI.

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What's in it

Data offered docs-verified: current weather (temperature, conditions, humidity, wind) · daily forecast summary (1–5 days) · city name to coordinates (geocoding)
Formats docs-verified: MCP streamable HTTP · JSON
Access docs-verified: API key required: free OpenWeatherMap and Groq accounts (keys via env: OPENWEATHER_API_KEY, GROQ_API_KEY); licence not stated

Useful for

Use cases llm-inferred: Site-visit weather briefing for field staff before survey work · Five-day forecast check when scheduling outdoor construction works · Prototype of an MCP tool wrapper around a third-party weather API for an internal agent
Audience llm-inferred: civils engineers (site planning) · developers building MCP-based agents

Limitations

Constraints docs-verified: Forecast limited to 1–5 days · Rate limit of 10 calls per minute per tool · Location strings over 100 characters are rejected · New OpenWeatherMap keys can take up to 2 hours to activate · Local development by default; authentication must be added before hosting · Requires both OpenWeatherMap and Groq API keys

Licence: Unknown — check provider terms
Authentication: API key via env: GROQ_API_KEY, OPENWEATHER_API_KEY (auto-extracted from README)
GitHub stars: 1
Last commit: 21/07/2026
Last successful page check: 14/10/2026
Page health: healthy
Package: Not recorded
Verification: Not independently verified

Auto-extracted, unverified fields: tools, install, auth. Check upstream documentation.

Provenance & evidence

Daily discovery 2026-10-15: GitHub search; verified via GitHub API. Tools/install/auth auto-extracted from README.

Metadata observed 14/10/2026 · daily-2026-10-15 (github-search)