Guide to Retrieve GraniteShares Gold Trust (BAR) Historical Prices via this API

In the ever-evolving landscape of financial technology, the ability to access real-time data is paramount for developers and traders alike. One such resource is the Metals-API, which provides comprehensive access to precious metals data, including historical prices for the GraniteShares Gold Trust (BAR). This guide will delve into the intricacies of retrieving historical prices for Gold (XAU) using the Metals-API, while also exploring the broader implications of digital transformation in the precious metals market.

About Gold (XAU)

Gold has long been regarded as a safe haven asset, a hedge against inflation, and a store of value. In recent years, the digital transformation of precious metals has reshaped how investors and traders interact with this timeless commodity. The integration of data analytics and market insights into trading strategies has empowered investors to make informed decisions based on real-time data. The advent of technology in trading has led to innovations in price discovery, allowing for more accurate and timely assessments of gold's value.

As a digital asset, gold is now more accessible than ever. Investors can leverage digital asset solutions to trade gold efficiently, utilizing platforms that provide real-time pricing and historical data. This is where the Metals-API comes into play, offering developers the tools necessary to build next-generation applications that can harness the power of real-time metals data.

API Description

The Metals-API is a powerful tool designed for developers seeking to integrate precious metals data into their applications. With its robust capabilities, the API empowers users to access real-time and historical data for various metals, including Gold (XAU), Silver (XAG), Platinum (XPT), and Palladium (XPD). The API's innovative design allows for seamless integration into trading platforms, financial applications, and analytical tools.

One of the standout features of the Metals-API is its ability to provide real-time exchange rate data, updated at intervals depending on the user's subscription plan. This ensures that users have access to the most current pricing information, which is critical for making timely trading decisions. Furthermore, the API supports a variety of endpoints, each tailored to meet specific data retrieval needs.

For comprehensive documentation on how to utilize the API effectively, developers can refer to the Metals-API Documentation. This resource provides detailed information on available endpoints, usage examples, and best practices for implementation.

Key Features and Endpoints

The Metals-API offers a range of endpoints that cater to various data retrieval needs. Below are some of the key features and their potential applications:

Latest Rates Endpoint: This endpoint provides real-time exchange rate data for precious metals. Depending on the subscription plan, users can receive updates every 60 minutes, every 10 minutes, or even more frequently. This feature is essential for traders who require the latest pricing information to make informed decisions.
Historical Rates Endpoint: Users can access historical rates for most currencies dating back to 2019. By appending a specific date to the API request, developers can retrieve historical pricing data, which is invaluable for trend analysis and market research.
Bid And Ask Endpoint: This powerful feature allows users to retrieve real-time bid and ask prices for metals. Understanding the bid-ask spread is crucial for traders looking to optimize their entry and exit points in the market.
Convert Endpoint: The Metals-API includes a currency conversion endpoint, enabling users to convert amounts from one metal to another or to/from USD. This is particularly useful for traders dealing with multiple currencies.
Time-Series Endpoint: This endpoint allows users to query the API for daily historical rates between two specified dates. It is particularly useful for analyzing price movements over time and identifying trends.
Fluctuation Endpoint: Users can track how metals fluctuate on a day-to-day basis using this endpoint. It provides insights into market volatility and helps traders make informed decisions based on historical fluctuations.
Carat Endpoint: This feature allows users to retrieve information about gold rates by carat. It is particularly useful for jewelers and those in the jewelry industry who need precise pricing based on gold purity.
Lowest/Highest Price Endpoint: Users can query the API to get the lowest and highest prices for a specified date. This information is crucial for traders looking to identify price extremes and potential reversal points.
Open/High/Low/Close (OHLC) Price Endpoint: This endpoint provides open, high, low, and close prices for a specified date, allowing traders to analyze price action and make strategic decisions.
Historical LME Endpoint: This endpoint provides access to historical rates for LME symbols dating back to 2008. It is particularly useful for users interested in long-term price trends.
API Key: Each user is assigned a unique API key, which must be included in the API request to authenticate access. This ensures that only authorized users can access the data.
API Response: The Metals-API delivers exchange rates relative to USD by default. All data is returned in a structured JSON format, making it easy for developers to parse and utilize the information.
Available Endpoints: The API offers a total of 14 endpoints, each providing different functionalities. Developers can explore these options to find the best fit for their application needs.
Supported Symbols Endpoint: This endpoint returns a constantly updated list of all available currencies and metals supported by the API. Developers can use this information to ensure they are querying valid symbols.
News Endpoint: Users can retrieve the latest news articles related to various metals, providing valuable context and insights into market movements.

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 to ensure they are using the correct symbols in their API requests.

API Endpoint Examples and Responses

Understanding the structure of API responses is crucial for effective integration. Below are examples of various API endpoints and their corresponding JSON responses:

Latest Rates Endpoint

Get real-time exchange rates for all available metals.

{
"success": true,
"timestamp": 1766628017,
"base": "USD",
"date": "2025-12-25",
"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": 1766541617,
"base": "USD",
"date": "2025-12-24",
"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": "2025-12-18",
"end_date": "2025-12-25",
"base": "USD",
"rates": {
"2025-12-18": {
"XAU": 0.000485,
"XAG": 0.03825,
"XPT": 0.000915
},
"2025-12-20": {
"XAU": 0.000483,
"XAG": 0.0382,
"XPT": 0.000913
},
"2025-12-25": {
"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": 1766628017,
"rate": 0.000482
},
"result": 0.482,
"unit": "troy ounces"
}

Fluctuation Endpoint

Track rate fluctuations between two dates.

{
"success": true,
"fluctuation": true,
"start_date": "2025-12-18",
"end_date": "2025-12-25",
"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": 1766628017,
"base": "USD",
"date": "2025-12-25",
"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": 1766628017,
"base": "USD",
"date": "2025-12-25",
"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

In conclusion, the Metals-API is an invaluable resource for developers looking to access real-time and historical data for precious metals, including Gold (XAU). By leveraging the various endpoints available, developers can create applications that provide insightful market analysis, facilitate trading, and enhance decision-making processes. The API's capabilities, combined with the digital transformation of the precious metals market, present a wealth of opportunities for innovation and growth.

For further exploration of the Metals-API and its features, developers are encouraged to visit the Metals-API Website and review the Metals-API Documentation for detailed guidance on implementation. Additionally, the Metals-API Supported Symbols page provides essential information on the various metals and currencies available for querying.

As the landscape of precious metals trading continues to evolve, staying informed and utilizing advanced tools like the Metals-API will be crucial for success in this dynamic market.

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Guide to Retrieve GraniteShares Gold Trust (BAR) Historical Prices via this API