Understanding United States Dollar (USD) Historical Prices using this API

Understanding United States Dollar (USD) Historical Prices using Metals-API

The United States Dollar (USD) serves as a cornerstone of the global economy, influencing trade, investment, and financial markets worldwide. Understanding its historical prices is crucial for developers and analysts who seek to leverage this information for various applications, including financial modeling, investment strategies, and market analysis. The Metals-API provides a powerful tool for accessing real-time and historical data on metals and currencies, enabling developers to build innovative applications that can analyze and visualize USD historical prices effectively.

About Neodymium (ND)

Neodymium, a rare earth metal, has gained significant attention in recent years due to its applications in technology and renewable energy. As industries undergo digital transformation, the metal markets are also evolving, driven by technological innovation and advancements. The integration of smart technology and data analytics into metal trading is reshaping how developers and businesses interact with these markets.

Data analytics and insights derived from metals data can empower businesses to make informed decisions. For instance, understanding the price trends of neodymium can help manufacturers optimize their supply chains and production processes. Furthermore, as the demand for neodymium increases in electric vehicle batteries and wind turbines, the potential for future trends and possibilities in this market becomes even more pronounced.

API Description

The Metals-API is a robust platform that provides real-time and historical data on metal prices and currency conversions. This API is designed to empower developers to create next-generation applications that can analyze market trends, perform currency conversions, and access historical data effortlessly. With its innovative capabilities, the Metals-API stands out as a transformative tool in the realm of financial data.

For more information about the API, visit the Metals-API Website. Comprehensive documentation is available at the Metals-API Documentation, which outlines the various features and functionalities of the API, including how to access historical prices for USD and other currencies.

Key Features and Endpoints

The Metals-API offers a variety of endpoints that cater to different needs, making it an invaluable resource for developers. Here are some of the key features:

• Latest Rates Endpoint: This endpoint provides real-time exchange rate data for metals, updated based on your subscription plan. Depending on the plan, updates can occur every 60 minutes or every 10 minutes, ensuring that you have access to the most current market information.
• Historical Rates Endpoint: Access historical rates for most currencies dating back to 2019. By appending a specific date in the format YYYY-MM-DD, developers can query the Metals-API for historical rates, allowing for in-depth analysis of price trends over time.
• Bid And Ask Endpoint: This powerful feature allows you to retrieve real-time bid and ask prices for metals, providing insight into market liquidity and pricing dynamics.
• Convert Endpoint: The Metals-API includes a currency conversion endpoint that enables users to convert amounts from one currency to another, facilitating seamless transactions and financial calculations.
• Time-Series Endpoint: This endpoint allows you to query daily historical rates between two dates of your choice, making it easier to analyze trends over specific periods.
• Fluctuation Endpoint: Track how currencies fluctuate on a day-to-day basis with this endpoint, which provides valuable insights into market volatility.
• Carat Endpoint: Retrieve information about gold rates by carat, which is essential for jewelers and investors in the precious metals market.
• Lowest/Highest Price Endpoint: Query the API to get the lowest and highest prices for a specified date, enabling users to identify market extremes.
• Open/High/Low/Close (OHLC) Price Endpoint: Access detailed OHLC data for specific dates, which is crucial for technical analysis and trading strategies.
• Historical LME Endpoint: This endpoint provides access to historical rates for LME symbols dating back to 2008, offering a wealth of data for analysts and traders.
• API Key: Each user is assigned a unique API key that must be included in requests to authenticate access to the API.
• API Response: The Metals-API returns exchange rates relative to USD by default, ensuring consistency in data interpretation.
• Available Endpoints: With 14 API endpoints, the Metals-API offers diverse functionalities to cater to various user needs.
• Supported Symbols Endpoint: This constantly updated endpoint returns all available currencies, allowing users to stay informed about the latest symbols.
• Intraday Endpoint: Query intraday exchange rate data for a single symbol, which is essential for high-frequency trading applications.

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 invaluable for developers looking to integrate specific metals into their applications.

API Endpoint Examples and Responses

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

Latest Rates Endpoint

Get real-time exchange rates for all available metals:

{
"success": true,
"timestamp": 1789172083,
"base": "USD",
"date": "2026-09-12",
"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": 1789085683,
"base": "USD",
"date": "2026-09-11",
"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": "2026-09-05",
"end_date": "2026-09-12",
"base": "USD",
"rates": {
"2026-09-05": {
"XAU": 0.000485,
"XAG": 0.03825,
"XPT": 0.000915
},
"2026-09-07": {
"XAU": 0.000483,
"XAG": 0.0382,
"XPT": 0.000913
},
"2026-09-12": {
"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": 1789172083,
"rate": 0.000482
},
"result": 0.482,
"unit": "troy ounces"
}

Fluctuation Endpoint

Track rate fluctuations between two dates:

{
"success": true,
"fluctuation": true,
"start_date": "2026-09-05",
"end_date": "2026-09-12",
"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": 1789172083,
"base": "USD",
"date": "2026-09-12",
"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": 1789172083,
"base": "USD",
"date": "2026-09-12",
"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

Understanding the historical prices of the United States Dollar (USD) is essential for developers and analysts who wish to leverage this information for various applications. The Metals-API provides a comprehensive suite of features that enable users to access real-time and historical data on metals and currencies. By utilizing endpoints such as the Latest Rates, Historical Rates, and Time-Series, developers can create powerful applications that analyze market trends and facilitate informed decision-making.

As industries continue to evolve and embrace digital transformation, the integration of APIs like Metals-API will play a pivotal role in shaping the future of financial data analysis. For more detailed information on how to implement these features, refer to the Metals-API Documentation and explore the Metals-API Supported Symbols for a complete list of available symbols.

In summary, the Metals-API is not just a tool for retrieving data; it is a gateway to understanding the complexities of the metal markets and the USD's historical prices. By harnessing the power of this API, developers can unlock new possibilities and drive innovation in their applications.