Visual Crossing announces the beta release of its brand-new Timeline Low-Latency Execution (LLX) Weather API, a high-performance endpoint designed to serve ultra-fast, high-volume weather-data needs in real time. The Timeline LLX API is available to all existing Visual Crossing Weather users, including free users and all plan levels, for real-time testing and evaluation.
Why Timeline LLX?
Built on the same robust weather data engine that powers Visual Crossing’s award-winning Timeline Weather API, the Timeline LLX API is engineered specifically for applications where speed, concurrency and lean responses matter most. Key applications include mobile apps, Internet of Things (IoT) devices, fleet telemetry, embedded systems, and other large-scale, high-call-rate use-cases.
Typical response times for the Timeline LLX endpoint are under 40 milliseconds, even under high concurrency. This represents a 5×–10× performance improvement compared with many legacy weather API endpoints. High concurrency usage allows developers to build distributed applications servings populations of hundreds of thousands of users and millions of connected devices.
Key Features at a Glance
- Leverages Visual Crossing’s high-resolution global weather engine to support high-volume weather use cases with deterministic, low latency.
- Delivers current conditions, hourly forecasts, daily forecasts (up to 15 days), and weather alerts from a single lightweight endpoint.
- Supports a streamlined “flat” JSON or CSV response format to minimize payload size and optimize throughput making it ideal for lightweight client devices.
- Maintains familiar Visual Crossing Weather parameters and structure to simplify migration or dual-use alongside the full Timeline API.
- Ideal for environments requiring massive query volumes at very low latency especially on reduced hardware and limited edge connectivity.
Pricing & Plans
Visual Crossing currently offers two tiers for Timeline LLX:
- Timeline LLX Core: $99/month — up to 5,000 API queries per minute and 50 million queries per month.
- Timeline LLX Premium: $300/month — up to 40,000 API queries per minute and 200 million queries per month.
Both tiers include access to current weather, 5-day hourly forecasts, 15-day daily forecasts including nearly 100 weather weather elements including advanced elements such as solar energy, air-quality & pollution data, and astronomy.
Access for All Existing Customers
The Timeline LLX endpoint is now in public beta and is immediately available to all existing Visual Crossing Weather customers, including those on the free-tier plan. Any current Timeline API user can make the same number of calls their plan already allows on the Timeline LLX endpoint without needing to contact Visual Crossing or make any plan changes. For those interested in more intensive testing or evaluation-level access (for example the 1,000 calls in a free plan could be consumed in less than a second), please contact our Business Team for additional access.
When to Use Timeline LLX vs. Timeline
If your application requires ultra-fast responses and mass concurrency — for example device telemetry, rapid refresh mobile apps, or micro-services architecture — Timeline LLX is the ideal choice. If instead you need deep historical data, statistics-based long-range forecasts, complex aggregations, batch multi-location queries, or climate normals, the existing Timeline API remains the industry-leading choice.
Next Steps for Developers & Teams
- Sign into your Visual Crossing account and obtain your API key.
- Try the Timeline LLX endpoint with a simple location query:
https://weather.visualcrossing.com/VisualCrossingWebServices/rest/api/v1/timelinellx?city=Paris&country=fr&key=YOUR_API_KEY - Review the call latency and discover the powerful yet lightweight flat JSON result structure. If you anticipate very high query rates, contact support for evaluation-level access to test your use-case at scale.
- Update your application logic if necessary to take advantage of the flat JSON/CSV responses and lean payloads. This is especially important when operating in bandwidth-constrained or edge-device environments.
Learn more about the Timeline LLX Weather API and start testing today at https://www.visualcrossing.com/resources/documentation/weather-api/timeline-llx-weather-api/