We looked through thousands of Financial APIs and put together a list of the most popular & cheapest ones available.

Foreign exchange rates and currency conversion API for 152 currencies

Currency API is a simple, reliable and real-time currency exchange API for current and historical forex rates. The API provides foreign exchange rates and currency conversion API for 152 currencies.

Let's have a closer look at Currency API features:

- **Built to integrate**
We store 152 currencies, crypto's and metals, that's easily accessible via a simple to use JSON or XML API.
-- Easily integrate currency conversion into your mobile app, website, e-commerce platform, and more.

- **Lightening Fast Currency Exchange Data**
Our application is stored on over 200 servers around the globe, making each request incredibly quick.
-- By serving our currency data from a data center closest to you, we've got one of the fasted response times in the industry.

- **152 Currencies and Crypto-Currencies**
We serve a wide range of world currencies, cryptos and metals
-- Including USD, EUR, GBP, Bitcoin, Litecoin and more.

- **Historical data at your fingertips**
We store currency data from as far back as the year 2000
-- Access the currency data via our API for a single day, or select up to a year of data in a single request.

- **Secure and reliable data via our API**
Bank-grade security with our SHA-256 SSL encryption
-- And reliable data from a range of difference sources to prevent a single point of failure.

And there's more!

- Convert currency pairs on the fly using our convert endpoint.
- Clear documentation with multiple language examples.
- Our support team are here to help around the clock.


Currency API

Financial Modeling Prep API allows earnings calendar, financial statements, multiple exchanges and more

**Financial Modeling Prep API**
_Financial data for every need._
Enchance your application with our data that goes up to 30 years back in history. Earnings calendar, financial statements, multiple exchanges and more

- **Fast, accurate and developer friendly**
We provide one of the most accurate data available on the market. Every endpoint is available in JSON format and most of them also in CSV format. Data is coming right from SEC filings after being serialized by us. Our API has over 50 endpoints and we are still growing by adding new endpoints every week. We also provide on demand custom endpoint available for our business clients.

Financial Modeling Prep API

Tiingo is an enterprise-grade financial markets API

**Tiingo API is a Reliable, Enterprise-Grade Financial Markets API**
_Tiingo's APIs power hedge funds, tech companies, and individuals._

Here are some of the key features of Tiingo API:

- **Tiingo End-of-Day Prices**
Our firm uses a proprietary error-checking framework that helps us clean data, catch missing events, and create redundant feeds.

- **Tiingo News**
Tiingo's News Feeds are built on over a decade of research. With 40 million articles spanning 20+ years of historical data, our feed delivers tagged content from financial & nontraditional news sources, making it one of the most expansive feeds available.

- **Tiingo Crypto**
Our Crypto API combines multiple exchanges, giving you a firehose of streaming data, and historical intraday data. Our feed allows for segmentation by exchanges, base & quote currencies, and enables easy conversions.

- **Tiingo Forex**
Tiingo Forex & FX Feeds give you access to tier-1 bank and dark pool liquidity. This means for the first time everyone has access to institutional grade liquidity.

- **The Investors Exchange (IEX)**
Tiingo gives access to our firm's cross-connect so you can get the raw firehose of data streamed right to your machine. Our API also archives and provides historical intraday data that lets you resample by any time period.


Tiingo API

Stay compliant with VAT Validation and Rates API for all your domestic and cross-border sales.

**VAT validation and tax rates API**
Stay compliant with our simple, reliable, and powerful API for all your domestic and cross-border sales.

- Full European Union coverage
- Real-time VAT data update
- Standard and reduced rates
- Bank-level security

**The VAT Validation and Rates API makes it easy to stay compliant with VAT laws**

- Reliable and up-to-date VAT data
It's critical to have the latest and most accurate VAT data, so Abstract works directly with multiple sources, including the EU Commission itself, to provide you trustworthy data.
- Validate VAT numbers via API
You're required to ensure the VAT numbers that you have or that users submit to you are valid, and Abstract makes it easy to validate VAT numbers with a single, simple API call.
- Calculate VAT prices via API
Abstract's VAT API can calculate the VAT owed on a specific purchase, taking into account the country of purchase as well as other purchase-specific details.
- VAT data from across the EU and beyond
Get VAT rates from individual countries, from across the European Union, and from other countries beyond the EU that use VAT. Abstract is the hub for all your VAT data needs.
- Standard and reduced VAT rates
Take into account a country's specific VAT rates and other details in calculating VAT prices to ensure that you have the most accurate VAT calculation via our API.
- Bank-level security for all queries
Our speed, data quality, and documentation are great, but security is top of mind too. All data that is sent and processed is secured via 256-bit SSL encryption (HTTPS).

VAT Validation and Rates API

Organizing and providing the world's financial data through a secure REST API

**Aletheia API**
_Organizing and Providing the World's Financial Data through a secure REST API_

- **Stock Data**
Retrieve technical data for a particular stock. Data is provided in real time and reflects present market conditions. You can request basic data such as stock price, day volume, and P/E ratio, and can also request complex data like held by institutions, dividends, and moving averages.
- **Fundamentals**
Our service scans hundreds of thousands of financial statement filings and presents these financial statements in an easily accessible and interpretable manner. Financial data between any two companies will be congruent in format to allow for direct comparison.
- **Insider Trading**
Retrieve historical insider trading records for any company and any individual. Hundreds of thousands of SEC filings at your fingertips with one query.
- **Earnings Call Analysis**
Retrieve historical insider trading records for any company and any individual. Hundreds of thousands of SEC filings at your fingertips with one query.
- **SEC Filings**
Access millions of filing documents with the Securities Exchange Commission (SEC) for any publically traded company. In addition to this, our service also provides the ability to transform common financial filings (i.e. 10-K, 10-Q, Form 4) into meaningful readable data.





Aletheia API

Developer-friendly REST API with live and historical currency exchange rates for over 200 world currencies, 6000 cryptocurrencies and blockchain data.

## Financial Market Data API
Developer-friendly REST API with live and historical currency exchange rates for over 200 world currencies, 6000 cryptocurrencies and blockchain data.

## Real-time mid-market & Historical Exchange Rates.
Central banks and currency traders define the rates at which they are willing to buy/sell a specific currency. The real-time mid-market rate is the midpoint between demand and supply at any point in time, making it the most accurate rate. The mid-market rate is the rate you will find on independent sources such as Yahoo Finance, Google Finance, Xignite and XE.

## A complete currency exchange rate data solution
Everything you need to gain access to world currencies and cryptocurrencies.

- **Trusted Sources**
Our currency data is sourced from financial data providers and banks, including the European Central Bank, Canadian Central Bank.
- **Rock-Solid Uptime & Speed**
Powered by best-in-class cloud infrastructure, our API delivers data in milliseconds around the clock with an uptime of nearly 100%.
- **Easy-to-integrate API**
Delivered in portable JSON format for maximum usability, ease of integration, and compatibility with any of your applications.
- **Free & Premium Plans**
Easy on your Budget If you ever need more than the Free Plan - get advanced API Access - Subscriptions Plans starting at Startup-friendly USD 10 per month.
- **Historical Data**
See how fiat and crypto have developed over time by querying the API for historical data all the way back to the year 1995.
- **Powerful JSON API**
Our API is backed by a solid and highly available cloud infrastructure, delivering your data in milliseconds.

The Top 20 Financial Apis for Developers