Create Cloudflare DNS records with Python

cloudflaredns.py

import logging
from os import getenv

import httpx

logging.basicConfig(level=logging.DEBUG)

# go to https://dash.cloudflare.com/profile/api-tokens
# and create a token with Zone.DNS permissions
CLOUDFLARE_TOKEN = getenv('CLOUDFLARE_TOKEN')
CLOUDFLARE_ZONE = getenv('CLOUDFLARE_ZONE')

http = httpx.Client(
    base_url='https://api.cloudflare.com/client/v4',
    headers={
        'Authorization': f'Bearer {CLOUDFLARE_TOKEN}',
    }
)


def add_dns_record(name: str, content: str, type: str = 'A', proxied: bool = False):
    res = http.get(f'/zones/{CLOUDFLARE_ZONE}/dns_records')
    res.raise_for_status()
    records = res.json()
    existing: list[str] = [it['id'] for it in records['result'] if it['name'] == name or it['name'].startswith(name)]
    logging.info(f'Found existing records for {name=}: {existing}')
    logging.info('Removing existing ones')
    for id in existing:
        http.delete(f'/zones/{CLOUDFLARE_ZONE}/dns_records/{id}')
    logging.info('Adding new record')
    res = http.post(f'/zones/{CLOUDFLARE_ZONE}/dns_records', json={
        'type': type,
        'name': name,
        'content': content,
        'proxied': proxied,
    })
    res.raise_for_status()


def main():
    import argparse

    assert CLOUDFLARE_ZONE and CLOUDFLARE_TOKEN

    parser = argparse.ArgumentParser()
    parser.add_argument('name', help='Name of subdomain, e.g. mail')
    parser.add_argument('destination', help='Content, e.g. an IP address for A records: 1.1.1.1')
    parser.add_argument('--type', '-t', default='A', help='Record type, e.g. A, CNAME, TXT')
    args = parser.parse_args()

    add_dns_record(name=args.name, content=args.destination, type=args.type)


if __name__ == '__main__':
    main()