Caiyun Weather API

Name: Caiyun Weather API API
Brand: Caiyun Weather API
Availability: InStock

★ Only Publicly Available OpenAPI DocumentData EnrichmentData TransformationapiKey5 EndpointsREST

For Agents

Look up real-time weather, minute-by-minute precipitation nowcasts, and hourly or daily forecasts for any coordinate on Earth and return structured JSON.

Quickstart

Get started with Caiyun Weather API in minutes using your preferred integration method.

# Add to your MCP client config (Claude Desktop, Cursor, Windsurf)
{
  "jentic": {
    "url": "https://api.jentic.com/mcp",
    "auth": "oauth"
  }
}

# Then ask your agent:
"minute level precipitation forecast for a coordinate"

# → Jentic returns the GET /events tool with parameter schema, agent executes.

Capabilities

What an agent can do with Caiyun Weather API API.

Retrieve real-time weather conditions including temperature, humidity, wind, and AQI for a coordinate

Pull minute-by-minute precipitation forecasts for the next two hours from radar data

Get hourly weather forecasts including temperature, humidity, wind, and precipitation for a coordinate

Get daily weather forecasts including high/low temperature, sunrise/sunset, and astro details

GET STARTED

Start building with Caiyun Weather API API

Explore with Jentic

View OpenAPI Document

Use for: Get the real-time weather for Beijing's latitude and longitude, Find out whether it will rain in the next 30 minutes at my location, Retrieve the hourly forecast for the next 48 hours for a coordinate, Get a 7-day daily weather forecast for a city

Not supported: Does not handle severe-weather alerts, satellite imagery, or historical weather records — use for current and short-term forecast lookups by coordinate only.

Jentic publishes the only available OpenAPI document for Caiyun Weather API, keeping it validated and agent-ready.

Jentic publishes the only available OpenAPI specification for Caiyun Weather API, keeping it validated and agent-ready. Caiyun Weather (ColorfulClouds) provides real-time conditions, minute-level precipitation nowcasts, hourly forecasts, and daily forecasts for any latitude and longitude on Earth. The minutely precipitation endpoint is its most distinctive feature, returning precipitation intensity for the next two hours in one-minute increments based on radar data. All endpoints accept the API token in the URL path and return JSON with localised condition codes.

Use Cases

Patterns agents use Caiyun Weather API API for, with concrete tasks.

★ Minute-Level Precipitation Nowcasts

Caiyun's minutely endpoint returns precipitation intensity for the next 120 minutes in one-minute steps, derived from radar imagery. An agent can call GET /{token}/{longitude},{latitude}/minutely.json and decide whether to delay a drone flight, an outdoor delivery, or a sports event. This level of granularity is rare among free weather APIs and is the main reason developers integrate Caiyun.

Call GET /{token}/116.4074,39.9042/minutely.json and report whether precipitation intensity exceeds 0.1 mm/min within the next 30 minutes.

Travel and Route Weather Lookups

Pull current and short-term weather along a route for travel planning, ride-hailing, or logistics apps. The agent calls GET /{token}/{longitude},{latitude}/realtime.json for each waypoint to get temperature, wind, visibility, and AQI. Combine with the hourly endpoint when the trip extends over the next two days.

Call GET /{token}/{longitude},{latitude}/realtime.json for the origin, midpoint, and destination of a delivery route and warn if any AQI exceeds 150.

Daily Forecast Widgets

Drive a 7-day forecast widget for a website or app from a single Caiyun call. The /daily.json endpoint returns daily high and low temperature, condition codes, sunrise and sunset, and moon phase. The structured JSON maps directly to UI components without further parsing.

Call GET /{token}/{longitude},{latitude}/daily.json with dailysteps=7 and render the highs, lows, and condition codes for the next week.

Agent-Driven Weather Lookups via Jentic

Connect Caiyun to an AI agent through Jentic so a user can ask 'will it rain in the next hour at this address?' in chat. The agent geocodes the address, searches Jentic for the matching Caiyun operation, loads the schema, and calls minutely.json with the API token kept in the Jentic vault. The token never appears in the agent's prompt or response.

Use the Jentic Python SDK to search for 'minute precipitation forecast', load the operation, and execute it with a given longitude and latitude.

Key Endpoints

5 endpoints — jentic publishes the only available openapi specification for caiyun weather api, keeping it validated and agent-ready.

METHOD

PATH

DESCRIPTION

GET

/{token}/{longitude},{latitude}/realtime.json

Real-time weather conditions

GET

/{token}/{longitude},{latitude}/minutely.json

Minute-level precipitation nowcast for next 2 hours

GET

/{token}/{longitude},{latitude}/hourly.json

Hourly forecast

GET

/{token}/{longitude},{latitude}/daily.json

Daily forecast

GET

/{token}/{longitude},{latitude}/weather.json

Combined real-time, minutely, hourly, daily payload

GET

/{token}/{longitude},{latitude}/realtime.json

Real-time weather conditions

GET

/{token}/{longitude},{latitude}/minutely.json

Minute-level precipitation nowcast for next 2 hours

GET

/{token}/{longitude},{latitude}/hourly.json

Hourly forecast

GET

/{token}/{longitude},{latitude}/daily.json

Daily forecast

GET

/{token}/{longitude},{latitude}/weather.json

Combined real-time, minutely, hourly, daily payload

Why though Jentic?

Three things that make agents converge on Jentic-routed access.

Credential isolation

Your Caiyun API token is stored encrypted in the Jentic vault and substituted into the URL path at execution time. The token never appears in prompts, model context, or logs.

Intent-based discovery

Agents search Jentic by intent (e.g. 'minute precipitation forecast' or 'hourly weather') and Jentic returns the matching Caiyun operation with its parameter schema, so the agent can call the right endpoint without reading open.caiyunapp.com.

Time to first call

Direct Caiyun integration: 1-2 hours including token-in-path handling and JSON parsing for the unique minutely shape. Through Jentic: under 10 minutes — search, load schema, execute.

Related APIs

Alternatives and complements available in the Jentic catalogue.

Alternative

OpenWeatherMap

Global weather API with current, forecast, and historical data and broad country coverage.

Choose OpenWeatherMap when you need broader global coverage or English-language docs over Caiyun's China-strong dataset.

Alternative

WeatherAPI

Forecast, history, and astronomy weather API with a generous free tier.

Choose WeatherAPI when the agent needs astronomy, marine, or sports-specific weather endpoints.

Alternative

Pirate Weather

Drop-in Dark Sky-compatible API with minutely, hourly, and daily forecasts.

Choose Pirate Weather when porting from Dark Sky or when the agent needs a US-focused dataset.

FAQs

Specific to using Caiyun Weather API API through Jentic.

Why is there no official OpenAPI spec for Caiyun Weather API?

Caiyun (ColorfulClouds) does not publish an OpenAPI specification, only HTML developer docs at open.caiyunapp.com. Jentic generates and maintains this spec so that AI agents and developers can call Caiyun Weather API via structured tooling. It is validated against the live API and kept up to date. Get started at https://app.jentic.com/sign-up.

What authentication does the Caiyun Weather API use?

The API uses an API token passed as part of the URL path (e.g. /v2.5/{token}/{longitude},{latitude}/realtime.json). You obtain the token from open.caiyunapp.com after creating an application. Jentic stores the token encrypted in the vault and substitutes it at execution time so it never enters the agent's prompt.

Can I get minute-level rain forecasts with the Caiyun Weather API?

Yes. Call GET /{token}/{longitude},{latitude}/minutely.json to receive a 120-element array of one-minute precipitation intensity values (mm/min) plus a human-readable description such as 'Light rain starting in 12 minutes'. This is Caiyun's distinguishing feature.

What are the rate limits for the Caiyun Weather API?

The free developer tier allows up to 1,000 requests per day. Paid tiers raise this quota to tens of thousands per day and reduce per-request latency. Check the open.caiyunapp.com console for your account's current tier and usage.

How do I get a 48-hour hourly forecast through Jentic?

Search Jentic for 'hourly weather forecast' and the GET /{token}/{longitude},{latitude}/hourly.json operation is returned with its schema. Load the operation, then execute it with hourlysteps=48. The standard quickstart is pip install jentic, search, load, execute.

Is the Caiyun Weather API free?

Caiyun offers a free developer tier with a daily quota; high-volume production use requires a paid plan billed by request volume. The minutely endpoint is included on all tiers.