Removes ALL GitHub repositories for selected organization. Requires Access Token (provided by env variable GH_TOKEN) with admin right/delete repositories rights. Scripts uses python requests and os module only.

remove_all_github_repos.py

import requests
import os

GH_TOKEN = os.environ['GH_TOKEN']
GH_HEADERS = {"Accept": "application/vnd.github+json",
              "Authorization": f"Bearer {GH_TOKEN}",
              "X-GitHub-Api-Version": "2022-11-28"}
ORG_NAME = "TODO-FIXME-YOUR-ORG-NAME"
REPO_SET=set()

def get_repolist():
    max_request = 100
    page = 0
    # python does not have do while, so we can use while TRUE or copy body of loop before while
    # in case of error max_requests won't 'eat' all GH rate limits for next hour
    while page < max_request:
        r_url = f"https://api.github.com/orgs/{ORG_NAME}/repos?page={page}&per_page=100"
        rv = requests.get(r_url, headers=GH_HEADERS)
        # response code != 200 or empty array (no more repos to paginate)
        if rv.status_code != 200 or len(rv.json()) == 0:
            break
        page += 1
        for i in rv.json():
            REPO_SET.add(i['name'])

def remove_repositories():
    for repo_name in REPO_SET:
        print(f"Removing {repo_name} repository")
        r_url = f"https://api.github.com/repos/{ORG_NAME}/{repo_name}"
        rv = requests.delete(r_url, headers=GH_HEADERS)
        # useful for debugging
        print(rv.text)
        print(rv.status_code)

def main():
    get_repolist()
    remove_repositories()


if __name__ == '__main__':
    main()