How to retrieve ProShares UltraShort Gold (GLL) prices with an API

Introduction

In today's fast-paced financial landscape, the ability to retrieve real-time data on precious metals like ProShares UltraShort Gold (GLL) is crucial for traders and investors. Utilizing an API, such as the Metals-API, allows developers to access comprehensive market insights and analytics that can significantly enhance trading strategies. This blog post will delve into the capabilities of the Metals-API, focusing on how it can be used to retrieve GLL prices and other vital information related to gold and other precious metals.

Metals-API Information

About Gold (XAU)

Gold, represented by the symbol XAU, has long been a cornerstone of financial markets and a safe haven for investors. The digital transformation in precious metals trading has opened new avenues for data analytics and market insights. With the integration of technology, traders can now leverage innovative solutions for price discovery and trading strategies.

The rise of digital asset solutions has further revolutionized how gold is traded. By utilizing APIs like the Metals-API, developers can create applications that provide real-time data, historical trends, and predictive analytics, allowing for informed decision-making in trading.

API Description

The Metals-API is a powerful tool designed to provide real-time and historical data on various metals, including gold, silver, platinum, and palladium. This API empowers developers to build next-generation applications that can analyze market trends, track price fluctuations, and convert currencies seamlessly.

With a focus on innovation and technological advancement, the Metals-API transforms how traders interact with market data. It offers a range of endpoints that cater to different needs, from retrieving the latest rates to accessing historical data and fluctuations.

Key Features and Endpoints

The Metals-API boasts a variety of endpoints, each designed to serve specific functions. Depending on your subscription plan, you can access real-time exchange rate data updated at different intervals. For instance, the Latest Rates Endpoint provides current rates for all available metals, allowing traders to make timely decisions based on the latest market conditions.

The Historical Rates Endpoint is invaluable for analyzing trends over time. It allows users to query historical rates dating back to 2019 by appending a specific date to the API request. This feature is particularly useful for backtesting trading strategies and understanding market behavior.

Another essential feature is the Bid and Ask Endpoint, which provides real-time bid and ask prices for metals. This data is crucial for traders looking to execute orders at the best possible prices. Additionally, the Convert Endpoint enables users to convert amounts from one metal to another or to/from USD, streamlining the trading process.

The Time-Series Endpoint allows for querying daily historical rates between two chosen dates, offering insights into price movements over specific periods. Similarly, the Fluctuation Endpoint tracks how currencies fluctuate daily, providing a clear picture of market volatility.

For those interested in gold rates by carat, the Carat Endpoint offers detailed information, while the Lowest/Highest Price Endpoint enables users to retrieve the lowest and highest prices for a given period. The Open/High/Low/Close (OHLC) Price Endpoint provides comprehensive data on price movements throughout the trading day.

Moreover, the Historical LME Endpoint gives access to historical rates for LME symbols dating back to 2008, making it a valuable resource for long-term analysis. The API also includes a News Endpoint, which retrieves the latest news articles related to various metals, keeping traders informed about market developments.

List of Symbols

The Metals-API provides access to a comprehensive range of metal symbols. For a complete list of all supported symbols and their specifications, refer to the Metals-API Supported Symbols page. This resource is essential for developers looking to integrate specific metal data into their applications.

API Endpoint Examples and Responses

To illustrate the capabilities of the Metals-API, let's explore some example responses from various endpoints.

Latest Rates Endpoint

Get real-time exchange rates for all available metals:

{
"success": true,
"timestamp": 1773014898,
"base": "USD",
"date": "2026-03-09",
"rates": {
"XAU": 0.000482,
"XAG": 0.03815,
"XPT": 0.000912,
"XPD": 0.000744,
"XCU": 0.294118,
"XAL": 0.434783,
"XNI": 0.142857,
"XZN": 0.344828
},
"unit": "per troy ounce"
}

Historical Rates Endpoint

Access historical exchange rates for any date since 1999:

{
"success": true,
"timestamp": 1772928498,
"base": "USD",
"date": "2026-03-08",
"rates": {
"XAU": 0.000485,
"XAG": 0.03825,
"XPT": 0.000915,
"XPD": 0.000748
},
"unit": "per troy ounce"
}

Time-series Endpoint

Get exchange rates for a specific time period:

{
"success": true,
"timeseries": true,
"start_date": "2026-03-02",
"end_date": "2026-03-09",
"base": "USD",
"rates": {
"2026-03-02": {
"XAU": 0.000485,
"XAG": 0.03825,
"XPT": 0.000915
},
"2026-03-04": {
"XAU": 0.000483,
"XAG": 0.0382,
"XPT": 0.000913
},
"2026-03-09": {
"XAU": 0.000482,
"XAG": 0.03815,
"XPT": 0.000912
}
},
"unit": "per troy ounce"
}

Convert Endpoint

Convert any amount from one metal to another or to/from USD:

{
"success": true,
"query": {
"from": "USD",
"to": "XAU",
"amount": 1000
},
"info": {
"timestamp": 1773014898,
"rate": 0.000482
},
"result": 0.482,
"unit": "troy ounces"
}

Fluctuation Endpoint

Track rate fluctuations between two dates:

{
"success": true,
"fluctuation": true,
"start_date": "2026-03-02",
"end_date": "2026-03-09",
"base": "USD",
"rates": {
"XAU": {
"start_rate": 0.000485,
"end_rate": 0.000482,
"change": -3.0e-6,
"change_pct": -0.62
},
"XAG": {
"start_rate": 0.03825,
"end_rate": 0.03815,
"change": -0.0001,
"change_pct": -0.26
},
"XPT": {
"start_rate": 0.000915,
"end_rate": 0.000912,
"change": -3.0e-6,
"change_pct": -0.33
}
},
"unit": "per troy ounce"
}

OHLC (Open/High/Low/Close) Endpoint

Get OHLC data for a specific time period:

{
"success": true,
"timestamp": 1773014898,
"base": "USD",
"date": "2026-03-09",
"rates": {
"XAU": {
"open": 0.000485,
"high": 0.000487,
"low": 0.000481,
"close": 0.000482
},
"XAG": {
"open": 0.03825,
"high": 0.0383,
"low": 0.0381,
"close": 0.03815
},
"XPT": {
"open": 0.000915,
"high": 0.000918,
"low": 0.00091,
"close": 0.000912
}
},
"unit": "per troy ounce"
}

Bid/Ask Endpoint

Get current bid and ask prices for metals:

{
"success": true,
"timestamp": 1773014898,
"base": "USD",
"date": "2026-03-09",
"rates": {
"XAU": {
"bid": 0.000481,
"ask": 0.000483,
"spread": 2.0e-6
},
"XAG": {
"bid": 0.0381,
"ask": 0.0382,
"spread": 0.0001
},
"XPT": {
"bid": 0.000911,
"ask": 0.000913,
"spread": 2.0e-6
}
},
"unit": "per troy ounce"
}

Conclusion

The Metals-API offers a robust solution for developers looking to retrieve real-time and historical data on precious metals, including ProShares UltraShort Gold (GLL). By leveraging its various endpoints, developers can create sophisticated applications that provide valuable insights into market trends and price movements.

With features such as the Latest Rates, Historical Rates, and Bid/Ask endpoints, the Metals-API empowers traders to make informed decisions based on accurate and timely data. The ability to convert currencies and track fluctuations further enhances its utility in the fast-paced world of trading.

For more information on how to implement these features and access the full capabilities of the Metals-API, refer to the Metals-API Documentation. Additionally, explore the Metals-API Supported Symbols page for a comprehensive list of available metal symbols.

In summary, the Metals-API is an essential tool for any developer or trader looking to harness the power of real-time metals data and integrate it into their trading strategies.