About Weather Api X402
Weather Api X402 is an MCP server and pay-per-call HTTP API for current conditions and seven-day forecasts worldwide. It provides weather data by city or coordinates, with x402 payments in USDC on Base and no API key or signup.
Key features
- 01Current conditions and seven-day forecasts
- 02Weather lookup by city or coordinates
- 03Temperature, humidity, wind, and precipitation
- 04x402 per-call USDC payments
Use cases
- 01Checking weather while planning travel
- 02Scheduling outdoor events
- 03Monitoring conditions for agriculture
- 04Planning weather-aware logistics
MCP support
Exposes the `data_get_weather` tool to MCP clients for retrieving current weather and forecasts by city or latitude and longitude. It is also available as an HTTP API with x402 payments.
Configuration
Remote servers need no local install. Pick your client, then copy the config or install in one click.
https://weather-api.api.klymax402.com/mcpclaude mcp add --transport sse weather-api-x402 https://weather-api.api.klymax402.com/mcp{"mcpServers":{"weather-api-x402":{"type":"sse","url":"https://weather-api.api.klymax402.com/mcp"}}}Open in Cursor{"servers":{"weather-api-x402":{"type":"sse","url":"https://weather-api.api.klymax402.com/mcp"}}}Open in VS Code{"mcpServers":{"weather-api-x402":{"type":"sse","url":"https://weather-api.api.klymax402.com/mcp"}}}{"mcpServers":{"weather-api-x402":{"serverUrl":"https://weather-api.api.klymax402.com/mcp"}}}Run commands in a terminal; paste JSON into the client’s MCP config and restart. Servers that need sign-in will prompt on first connect.
Tools
Details
From the project READMEWeather API
Current weather and 7-day forecast -- temperature, humidity, wind, precipitation. Any location worldwide. Pay-per-call via x402 (USDC on Base L2) -- no API key, no signup, no rate-limit wall.
Part of the klymax402 marketplace -- 100 x402 micropayment APIs for AI agents, one wallet, USDC on Base.
Quickstart -- MCP
Add to your MCP client config (Claude Desktop, Cursor, ElizaOS, etc.):
{
"mcpServers": {
"weather-api": {
"url": "https://weather-api.api.klymax402.com/mcp"
}
}
}
Quickstart -- HTTP (x402)
curl -X POST "https://weather-api.api.klymax402.com/api/weather" \
-H "Content-Type: application/json" \
-d '{}'
# -> 402 Payment Required, with an x402 payment challenge in the response body
Any x402-aware client (@x402/fetch, x402-agent-tools, ATXP) handles the 402 -> sign -> retry cycle automatically.
Tools
| Tool | Method | Path | Price | Description |
|---|---|---|---|---|
data_get_weather | POST | /api/weather | $0.003 | Get current weather and forecast for a location |
data_get_weather
Use this when you need current weather conditions or a 7-day forecast for any location. Returns weather data in JSON.
Parameters
| Name | Type | Required | Description |
|---|---|---|---|
latitude | number | no | Latitude (-90 to 90) |
longitude | number | no | Longitude (-180 to 180) |
city | string | no | City name (alternative to lat/lon, uses geocoding) |
Example response:
{"location":{"city":"Paris","country":"France","latitude":48.85,"longitude":2.35},"current":{"temperature":18.5,"humidity":62,"windSpeed":12,"precipitation":0,"weatherCode":"partly_cloudy"},"forecast":[{"date":"2026-04-14","tempMin":12,"tempMax":20,"precipitation":0.2}]}
When to use: travel planning, outdoor event scheduling, agriculture monitoring, logistics planning, and building weather-aware applications.
Not for: timezone info (use utility_convert_timezone), stock data (use finance_get_stock_price).
Example agent prompts
- "Current weather conditions or a 7-day forecast for any location"
Payment
- Protocol: x402 -- HTTP-native pay-per-call, no signup, no API key
- Network: Base L2 (
eip155:8453) - Asset: USDC
- Facilitator: Coinbase CDP (primary), PayAI (fallback)
- Also reachable via ATXP (OAuth-wrapped x402, RFC 9728 protected-resource metadata)
Part of klymax402
100 x402 micropayment APIs for AI agents -- one wallet, USDC on Base, zero signup.
- Catalog: https://klymax402.com/llms.txt
- Full API reference: https://klymax402.com/llms-full.txt
- Live stats: https://klymax402.com/stats
License
MIT
Comments
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