use https://myrepos.branchable.com/ with https://gitea.io/

gite_myrepos.py

#!/usr/bin/env python3
"""
A litte tool to generate a .mrconfig file for https://myrepos.branchable.com/
from a https://gitea.io/ account.

sudo apt install python3 python3-requests

Check possible values for your MR_REPO_TEMPLATE with
$  curl --user ${GITEA_USER}:{$GITEA_PASS} https://${GITEA_HOST}/api/v1/user/repos | jq .
"""

import os
import sys
import requests

MR_REPO_TEMPLATE = """
[{full_name}]
checkout = git clone {ssh_url}
"""

# feel free to use sys.argv[] here.
GITEA_HOST = 'gitea.example.com'
GITEA_USER = 'your-username'
GITEA_PASS = 'your-password'


def fatal(msg):
    sys.stderr.write(msg)
    sys.stderr.flush()
    sys.exit(1)


def fetch_repos():
    try:
        url = 'https://{}/api/v1/user/repos'.format(GITEA_HOST)
        response = requests.get(url, auth=(GITEA_USER, GITEA_PASS))
    except requests.exceptions.RequestException as e:
        fatal(str(e))

    try:
        return response.json()
    except ValueError as e:
        fatal('Malformed JSON: {}'.format(e))


def mr_config(repo):
    try:
        return MR_REPO_TEMPLATE.format(**repo)
    except KeyError as e:
        fatal('Unexpected JSON: {}'.format(e))


if __name__ == '__main__':
    for repo in fetch_repos():
        sys.stdout.write(mr_config(repo))
    sys.stdout.flush()