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Getting repl metadata

In some cases, it's useful to automatically retrieve metadata about a Repl from within that Repl. Your Repl's environment variables are pre-populated with some data that you can use. However, please avoid printing out the entirety of your Repl's environment variables in a public Repl, as it will expose any secrets you've added.

To access this data, first retrieve your Repl's environment variables.

Retrieve environment variables in Node.js


Retrieve environment variables in Python

import os


Retrieve environment variables in Rust

use std::env;

fn main() {
for (key, value) in env::vars() {
println!("{}: {}", key, value);

To access a single environment variable from within a Repl, use the following examples:

Access a single environment variable in Node.js:

const variable = process.env.REPL_SLUG;

Access a single environment variable in Python:

import os

variable = os.environ.get('REPL_SLUG')

Access a single environment variable in Rust:

use std::env;

fn main() {
let variable = env::var("REPL_SLUG").unwrap();
println!("{}", variable);

Here is a table showing the most useful metadata accessible inside your Repl:

REPL_OWNERThe username of the owner of the Repl. If your Repl is text-based and has no webserver, REPL_OWNER will reflect the value of the current user accessing the Repl
REPLIT_DB_URLThe URL of your key-value Replit database
REPL_IDThe unique UUID string of your Repl
HOMEThe home path of your Repl
systemThe system name of your Repl
LANGText language and encoding
REPL_IMAGEThe docker image that corresponds to your Repl
REPL_LANGUAGEThe language of your Repl
REPL_PUBKEYSA stringified JSON object containing different public api keys
REPL_SLUGThe slug of your Repl
PRYBAR_FILEThe main/entrypoint file of your Repl