cronjob.de MCP server

Remote MCP server for cronjob.de, a web cron service running since 2003. Connect Claude, ChatGPT, Cursor or any MCP client to your account and manage scheduled HTTP calls in plain language.

This repository documents the public MCP endpoint. The service itself is not open source — there is no server code to install. You connect to the hosted endpoint below.

Endpoint

https://www.cronjob.de/bridge

• Transport: Streamable HTTP
• Authentication: OAuth 2.1 with PKCE and dynamic client registration
• Requires: an account on the Unlimited plan, or the 14-day trial every new account starts with. Free and Plus do not include MCP access, not even read-only.

Setup

1. Add https://www.cronjob.de/bridge as a custom connector in your client.
2. Your browser opens; sign in to cronjob.de and approve access.
3. Done. No token to copy, no config file.

Full instructions: https://www.cronjob.de/ki-verbinden

What the service does

cronjob.de calls a URL you provide on a schedule you set, from once a year to every minute. The script behind that URL runs on your own server — cronjob.de never executes code of yours. It records the response, keeps a call log and emails you when a call fails. It exists for websites on shared hosting with no cron of their own, or with intervals that are too coarse.

Tools

Tool	Does	Annotation
list_jobs	List your cronjobs	readOnlyHint
get_job	Show one cronjob in full	readOnlyHint
list_job_history	Read the call log	readOnlyHint
list_folders	List folders	readOnlyHint
create_job	Create a cronjob	write
update_job	Change a cronjob	write
set_job_active	Enable or disable	write
move_job	Move to another folder	write
create_folder	Create a folder	write
delete_job	Delete a cronjob	destructiveHint

Every tool carries a title and the applicable readOnlyHint or destructiveHint, so your client can answer read-only questions without prompting and check before deleting. delete_job additionally requires naming the job, so deletion cannot happen by accident.

Schedules can be given in plain language — "every second Tuesday at 6:45" — crontab syntax is optional.

Security

• OAuth 2.1 with PKCE. You approve access in your browser, in your own session; no password ever reaches the assistant.
• Access tokens last one hour. Refresh tokens last 30 days and rotate on every use; reusing one revokes the entire chain.
• Only hashes are stored. Reading the database would not let anyone sign in.
• Every call is written to an audit log in your account, so you can see what the assistant did and revoke access at any time.

Privacy Policy

https://www.cronjob.de/datenschutz

All processing takes place in the EU, on servers in Nuremberg, Falkenstein and Helsinki. The contracting party is a German company. A data processing agreement under Article 28 GDPR is available for cronjobs that handle personal data.

Support

https://www.cronjob.de/kontakt

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Deutsch: Diese Anbindung verbindet Claude, ChatGPT oder Cursor mit Ihrem Konto bei cronjob.de. Adresse eintragen, im Browser bestätigen, fertig — kein Token, keine Konfigurationsdatei. Ausführlich beschrieben unter https://www.cronjob.de/ki-verbinden. Voraussetzung ist der Tarif Unlimited oder die 14-tägige Testphase.

License

The documentation in this repository is released under CC0 1.0 — copy it, quote it, translate it, no permission needed.

The cronjob.de service itself is proprietary and is not covered by this.