# Saylor Innovations Hong Kong Weather

> Saylor Innovations Hong Kong Weather is a paid API for AI agents from saylorinnovations.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-18).

Returns current Hong Kong Observatory weather data including temperature, humidity, UV index, district rainfall, active warnings, and a 9-day forecast

## Facts

- Endpoint: GET https://saylorinnovations.com/api/hongkong/weather?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-18
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/saylor-innovations-hong-kong-weather-c16e21fb
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_3O04c1BkGkn3yncOALXIh

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 saylor-innovations-hong-kong-weather-c16e21fb
```

Example prompt: What's the current weather in Hong Kong right now — temperature, humidity, UV index, any active warnings, and the 9-day forecast?

## When to prefer this

Use this endpoint when you need current or forecast weather data specifically for Hong Kong, including official Observatory warnings (e.g. typhoon signals), district-level rainfall, and UV index — data only the HKO publishes. Prefer this over generic global weather APIs when you need HKO-official warning signals or district rainfall granularity specific to Hong Kong.

## Known failure modes

- Hong Kong Observatory upstream unavailable — may return null fields or stale data
- UV index or district rainfall fields may be null during nighttime or low-activity periods
- Warnings array may be empty if no active alerts are in effect
- Tropical cyclone field may be null when no cyclone is active

## How this service works

Hong Kong Observatory current temperature, humidity, UV index, district rainfall and warnings with the general situation and a 9-day forecast

## Output

A JSON object containing current temperature in Celsius, humidity percentage, UV index, temperature range, list of districts currently experiencing rain, array of active Observatory warning texts, tropical cyclone status, a general situation narrative, and a 9-day forecast array (each day includes date, weekday, min/max temperature, humidity, rain probability, wind description, and weather text), plus a source attribution and last-updated timestamp.

## 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"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "json"
    },
    "example": {
     "type": "object",
     "required": [
      "temperature_range_c",
      "forecast_9_day"
     ],
     "properties": {
      "note": {
       "type": "string",
       "description": "Caveat or context for reading the result"
      },
      "source": {
       "type": "string",
       "description": "Data source the values come from"
      },
      "updated": {
       "type": [
        "string",
        "null"
       ],
       "description": "Time the record was last updated"
      },
      "uv_index": {
       "type": [
        "object",
        "null"
       ],
       "description": "Uv index"
      },
      "warnings": {
       "type": "array",
       "description": "Active weather warning texts from the Observatory"
      },
      "temperature_c": {
       "type": [
        "number",
        "null"
       ],
       "description": "Temperature, in degrees Celsius"
      },
      "forecast_9_day": {
       "type": "array",
       "items": {
        "type": "object",
        "properties": {
         "date": {
          "description": "Date (YYYY-MM-DD)"
         },
         "wind": {
          "type": [
           "string",
           "null"
          ],
          "description": "Wind forecast text"
         },
         "max_c": {
          "description": "Max, in degrees Celsius"
         },
         "min_c": {
          "description": "Min, in degrees Celsius"
         },
         "weather": {
          "type": [
           "string",
           "null"
          ],
          "description": "Weather forecast text"
         },
         "weekday": {
          "description": "Day of the week"
         },
         "humidity_percent": {
          "description": "Humidity, as a percentage"
         },
         "rain_probability": {
          "description": "Rain probability"
         }
        }
       },
       "description": "Forecast 9 day"
      },
      "humidity_percent": {
    
… (truncated)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/saylor-innovations-hong-kong-weather-c16e21fb/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from saylorinnovations.com](https://www.zero.xyz/host/saylorinnovations.com/llms.txt)