# Site Climate – Koppen-Geiger Climate Class

> Site Climate – Koppen-Geiger Climate Class is a paid API for AI agents from site-climate.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-21).

Returns the Koppen-Geiger climate classification code (e.g. Cfa, BSk) for any geographic coordinate, derived from monthly temperature and rainfall normals.

## Facts

- Endpoint: GET https://site-climate.x402tookit.com/koppen-class?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/site-climate-koppen-geiger-climate-class-a6dbae78
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_g0nBZafIAUHDec8h_-p6s

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability site-climate-koppen-geiger-climate-class-a6dbae78
```

Example prompt: What's the Koppen-Geiger climate classification for coordinates 40.71 latitude, -74.01 longitude — give me the code and a description of what it means.

## When to prefer this

Choose this endpoint when you need a standardized, globally-recognized climate zone label (Koppen-Geiger) for any coordinate on Earth, especially for site assessment, environmental analysis, agricultural planning, or research tasks. It is more appropriate than raw weather data endpoints when you need a categorical climate classification rather than real-time or historical weather values.

## Known failure modes

- Missing or out-of-range lat/lon parameters return a validation error
- Coordinates over open ocean or polar ice may return null or degraded results
- Service may return degraded=true if underlying climate normal data is unavailable for the location
- Payment failure via x402 protocol results in a 402 response before any data is returned

## How this service works

Koppen-Geiger climate class (such as Cfa or BSk) for a location, computed from its monthly temperature and rainfall normals.

## Output

Returns a structured response including the Koppen-Geiger code (e.g. Cfa), a human-readable description, first-letter climate group, mean annual temperature in Celsius, annual rainfall in mm, aridity threshold, coldest and warmest month temperatures, data source, attribution, and optional summary or disclaimer fields.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "lat",
      "lon"
     ],
     "properties": {
      "lat": {
       "type": "number",
       "description": "Latitude, -90 to 90"
      },
      "lon": {
       "type": "number",
       "description": "Longitude, -180 to 180"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "asOf": {
       "type": [
        "null",
        "string"
       ]
      },
      "source": {
       "type": [
        "null",
        "string"
       ]
      },
      "reasons": {
       "type": [
        "array",
        "null"
       ],
       "items": {
        "type": "string"
       }
      },
      "summary": {
       "type": [
        "null",
        "string"
       ]
      },
      "verdict": {
       "type": [
        "null",
        "string"
       ]
      },
      "degraded": {
       "type": [
        "boolean",
        "null"
       ]
      },
      "latitude": {
       "type": [
        "null",
        "number"
       ]
      },
      "longitude": {
       "type": [
        "null",
        "number"
       ]
      },
      "sourceUrl": {
       "type": [
        "null",
        "string"
       ]
      },
      "disclaimer": {
       "type": [
        "null",
        "string"
       ]
      },
      "koppenCode": {
       "type": [
        "null",
        "string"
       ]
      },
      "notChecked": {
       "type": [
        "array",
        "null"
       ],
       "items": {
        "type": "string"
       }
      },
      "attribution": {
       "type": [
        "null",
        "string"
       ]
      },
      "description": {
       "type": [
        "null",
        "string"
       ]
      },
      "firstLetter": {
       "type": [
        "null",
        "string"
       ]
      },
      "coldestMonthC": {
       "type": [
        "null",
        "number"
       ]
      },
      "warmestMonthC": {
       "type": [
     
… (truncated)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/site-climate-koppen-geiger-climate-class-a6dbae78/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from site-climate.x402tookit.com](https://www.zero.xyz/host/site-climate.x402tookit.com/llms.txt)