Best Financial Data APIs Software for JavaScript

Massive serves as a comprehensive market-data infrastructure platform designed to furnish developers, startups, and trading firms with both real-time and historical financial information. The service provides institutional-quality market data across a variety of asset classes, including stocks, options, indices, currencies, and futures, accessible through a user-friendly API, WebSocket, flat-file S3 access, or SQL query interface. Prioritizing low latency, Massive offers direct connections to leading exchanges such as NYSE, NASDAQ, CBOE, and OTC, while ensuring data normalization to prevent survivorship bias and outdated information pipelines. By positioning itself as a force for “modernizing Wall Street,” Massive seeks to dismantle traditional barriers, making high-quality market data that was once exclusive to large institutions readily available to any application developer. In addition to its robust data offerings, the platform features a wealth of documentation, client libraries compatible with languages such as Python, JavaScript, Go, and Java, as well as tutorials and sample projects, all aimed at facilitating seamless integration for users. This commitment to accessibility and ease of use empowers a new generation of fintech innovation, enabling developers to harness sophisticated financial data effortlessly.

Access both current and historical currency exchange rates alongside comprehensive information on stock exchanges worldwide. Additionally, utilize a convenient logo endpoint for various payment methods. The Synth API is designed to streamline the process of integrating its diverse fintech data tools, ensuring ease of use. You can send HTTP requests in any programming language to interact with the API seamlessly. Synth delivers cutting-edge fintech APIs tailored for businesses that are weary of outdated enterprise solutions. To maintain security, all production requests must be directed through your own backend server, allowing your API key to be safely retrieved from environment variables or a key management service. Transform obscure bank transactions into recognizable merchant information, complete with logos and addresses. The API also provides a complete list of fiat currencies, detailing essential information about each one. Real-time currency rates are refreshed every minute, ensuring you have the latest information at your fingertips. Lastly, Synth maintains an updated directory of all supported stock tickers, making it a valuable resource for financial insights.

Accelerate your financial decision-making with comprehensive credit data API solutions that ensure compliance and efficiency. Discover the benefits of utilizing credit data-as-a-service through CRS, which provides access to credit reports from Equifax, Experian, and TransUnion, as well as public records and alternative data all consolidated in one platform. Begin your journey to seamless lending, thorough screening, and effective credit monitoring right here. With CRS, you can expertly navigate a plethora of data products to find scalable, cost-effective, and compliant data solutions that are perfectly suited to your needs. You can start accessing credit data in under two weeks by integrating our all-in-one credit data API, which can be set up in just a matter of days. Enjoy the simplicity of having one contract, a single vetting process, and fully managed compliance, making the handling of credit data straightforward. The quickest way to embed credit and regulated data into your systems is through an API customized to your specific programming language and framework. Our independent API is designed to be secure, redundant, and scalable, delivering responses that are both concise and comprehensive. Experience time-saving efficiency with the new industry standard for credit APIs, exclusively available through CRS, which can transform your data integration processes. Additionally, the user-friendly interface ensures that even those new to credit data can navigate it with ease.