# Japan Weather Forecast & Warnings API

> JMA forecasts, warnings and overviews. Accepts office codes, prefecture names, or major city names (Sapporo, Yokohama, Nagoya, Kobe...). Pay per call with USDC via the x402 protocol (HTTP 402) on Base, Polygon, or Solana. No API key, no signup: call any endpoint, read the payment instructions from the 402 response, pay, retry. Facilitator: Coinbase CDP.

## Endpoints
- GET /forecast/{area} ($0.005)
- GET /overview/{area} ($0.005)
- GET /warnings/{area} ($0.005) — poll for active warnings
- GET /areas ($0.001)
- POST /batch

## Machine-readable docs
- [x402 manifest with schemas and examples](https://weather.agentic-jp.com/.well-known/x402)
- [OpenAPI 3.1](https://weather.agentic-jp.com/openapi.json)
- [Agent skill guide](https://weather.agentic-jp.com/.well-known/skill.md)

## How to pay
Any x402 client works: @x402/fetch or @x402/axios (npm), x402 (pip), Coinbase AgentKit, `npx agentcash`. MCP server for all 7 Japan Data APIs: `npx -y @mameta/japan-data-mcp`.

## All Japan Data APIs
- [Directory of all 8 services](https://agentic-jp.com/) · [services.json](https://agentic-jp.com/services.json)