README.md

In simfinapi: Accessing 'SimFin' Data

simfinapi

What does simfinapi do?

simfinapi wraps the https://www.simfin.com/ Web-API to make ‘SimFin’ data easily available in R.

To use the package, you need to register at https://app.simfin.com/login and obtain a ‘SimFin’ API key.

Example

In this example, we download some stock price data and turn these into a simple plot.

# load package
# library(simfinapi)
devtools::load_all()
#> ℹ Loading simfinapi

# download stock price data
tickers <- c("AMZN", "GOOG") # Amazon, Google
prices <- sfa_load_shareprices(tickers)

Please note that all functions in simfinapi start with the prefix sfa_. This makes it easy to find all available functionality.

The downloaded data looks like this:

| name | id | ticker | currency | Date | Dividend Paid | Common Shares Outstanding | Last Closing Price | Adjusted Closing Price | Highest Price | Lowest Price | Opening Price | Trading Volume | |:------------------|----:|:-------|:---------|:-----------|--------------:|--------------------------:|-------------------:|-----------------------:|--------------:|-------------:|--------------:|---------------:| | Alphabet (Google) | 18 | GOOG | USD | 2014-03-27 | NA | 6721016620 | 27.92 | 27.92 | 28.40 | 27.65 | 28.40 | 262000 | | Alphabet (Google) | 18 | GOOG | USD | 2014-03-28 | NA | 6721016620 | 28.00 | 28.00 | 28.32 | 27.93 | 28.06 | 822000 | | Alphabet (Google) | 18 | GOOG | USD | 2014-03-31 | NA | 13489240000 | 27.85 | 27.85 | 28.35 | 27.85 | 28.34 | 216000 | | Alphabet (Google) | 18 | GOOG | USD | 2014-04-01 | NA | 13489240000 | 28.36 | 28.36 | 28.42 | 27.94 | 27.94 | 158000 | | Alphabet (Google) | 18 | GOOG | USD | 2014-04-02 | NA | 13489240000 | 28.35 | 28.35 | 30.24 | 28.11 | 28.26 | 2934000 | | Alphabet (Google) | 18 | GOOG | USD | 2014-04-03 | NA | 13489240000 | 28.49 | 28.49 | 29.36 | 28.21 | 28.49 | 101704000 |

Let’s turn that into a simple plot.

# load ggplot2
library(ggplot2)

# create plot
ggplot(prices) +
  aes(x = Date, y = `Last Closing Price`, color = name) +
  geom_line()

Installation

From CRAN:

install.packages("simfinapi")

If you want to try out the newest features you may want to give the development version a try and install it from GitHub:

remotes::install_github("https://github.com/matthiasgomolka/simfinapi")

Setup

Using simfinapi is much more convenient if you set your API key and cache directory[^readme-1] globally before you start downloading data. See ?sfa_set_api_key and ?sfa_set_cache_dir for details.

[^readme-1]: simfinapi always caches the results from your API calls to obtain results quicker and to reduce the number of API calls. If you set the cache directory to a permanent directory (the default is tempdir()), simfinapi will be able to reuse this cache in subsequent R sessions.

Code of Conduct

Please note that the ‘simfinapi’ project is released with a Contributor Code of Conduct. By contributing to this project, you agree to abide by its terms.

simfinapi documentation built on Sept. 11, 2025, 1:07 a.m.