r-fmpapi

Financial Modeling Prep API Client

https://github.com/tidy-finance/r-fmpapi

Repository

Financial Modeling Prep API Client

README.Rmd

---
output: github_document
---



```{r, include = FALSE}
knitr::opts_chunk$set(
  collapse = TRUE,
  comment = "#>",
  fig.path = "man/figures/README-",
  out.width = "100%"
)
```

# r-fmpapi


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Provides a flexible interface to the ['Financial Modeling Prep' API](https://site.financialmodelingprep.com/developer/docs). The package supports all available endpoints and parameters, enabling R users to interact with a wide range of financial data.

> :bulb: This package is developed by Christoph Scheuch and not sponsored by or affiliated with FMP. However, you can get **15% off** your FMP subscription by using [this affiliate link](https://site.financialmodelingprep.com/pricing-plans?couponCode=tidyfinance). By signing up through this link, you also support the development of this package at no extra cost to you.

For a Python implementation, please consider the [`py-fmpapi`](https://github.com/tidy-finance/py-fmpapi) library.

## Installation

You can install the package from CRAN via:

```r
install.packages("fmpapi")
```

You can install the development version from GitHub:

```r
pak::pak("tidy-finance/r-fmpapi")
```

## Setup

Before using the package, you need to set your Financial Modeling Prep API key. You can set it using the `fmp_set_api_key()` function, which saves the key to your `.Renviron` file for future use (either in your project or home folder).

```r
library(fmpapi)

fmp_set_api_key()
```

## Usage

Since the FMP API has a myriad of endpoints and parameters, the package provides a single function to handle requests: `fmp_get()`.

You can retrieve a company’s profile by providing its stock symbol to the `profile` endpoint:

```r
fmp_get(resource = "profile", symbol = "AAPL")
```

To retrieve the balance sheet statements for a company, use the `balance-sheet-statement` endpoint. You can specify whether to retrieve annual or quarterly data using the `period` parameter and the number of records via `limit`. Note that you need a paid account for quarterly data. 

```r
fmp_get(resource = "balance-sheet-statement", symbol = "AAPL", params = list(period = "annual", limit = 5))
```

The `income-statement` endpoint allows you to retrieve income statements for a specific stock symbol. 

```r
fmp_get(resource = "income-statement", symbol = "AAPL")
```

You can fetch cash flow statements using the `cash-flow-statement` endpoint.

```r
fmp_get(resource = "cash-flow-statement", symbol = "AAPL")
```

Most free endpoints live under API version 3, but you can also control the api version in `fmp_get()`, which you need for some paid endpoints. For instance, the `symbol_change` endpoint:

```r
fmp_get(resource = "symbol_change", api_version = "v4")
```

## Relation to Existing Packages

There are two existing R packages that also provide an interface to the FMP API. Both packages lack flexibility because they provide dedicated functions for each endpoint, which means that users need to study both the FMP API docs and the package documentation and developers have to create new functions for each new endpoint. 

- [fmpapi](https://github.com/jpiburn/fmpapi): not released on CRAN and last commit more than 3 years ago. 
- [fmpcloudr](https://cran.r-project.org/package=fmpcloudr): last updated on CRAN more than 3 years ago.

## Contributing

Feel free to open issues or submit pull requests to improve the package. Contributions are welcome!

## License

This package is licensed under the MIT License.

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