Is there a REST API for Cronjob.de?

No. Cronjob.de speaks MCP (Model Context Protocol), and everything that works in your account works through it. You connect Claude, ChatGPT, Cursor or your own MCP client directly to your account and have it list, create, change, move, run now, switch on and off or delete cronjobs, read the call log and find failed calls. The same goes for heartbeats and end signals, server monitors with uptime and incidents, SSL certificates, alert contacts and recipients, and status pages. You manage no keys: sign-in uses OAuth 2.1 with PKCE.

How do I use the interface from my own script?

With an MCP client; they exist for Python, TypeScript and other languages. For servers without a browser there is also a fixed token that does not expire.

What does the connection cost?

It is included in the Unlimited plan and in the 14-day trial every new account starts with. It is not available on the Free and Plus plans.

Model Context Protocol

Cronjob API via MCP: manage cronjobs with Claude, ChatGPT or Cursor

The interface to Cronjob.de is not a REST API but MCP. Connect your AI assistant to your account once, then just ask in plain language – „Which cronjobs failed yesterday?“, „Create one that runs on Sundays at 4am.“ or „Monitor my website and show it on my status page.“ Your assistant can do everything your account can: cronjobs, heartbeats, server monitoring, SSL certificates, notifications and status pages. No token, no config file.

https://www.cronjob.de/bridge This is the address you enter in your assistant.

Included in the Unlimited plan. Connecting an AI assistant is part of the Unlimited plan – and of the 14-day trial every new account starts with. The assistant inside your account, which creates cronjobs from instructions, is unaffected: that one comes with every plan.

Connected in three steps

Enter the address. In Claude under „Connectors“, in ChatGPT and Cursor at the corresponding place for MCP servers.
Confirm in the browser. Cronjob.de opens, you sign in as usual and allow access. We show you which account the connection applies to.
Done. Your assistant now knows your cronjobs. You can disconnect at any time under „AI access“.

What the assistant can do

Tool	What for	Kind
`list_jobs`	List cronjobs	read only
`get_job`	View a cronjob	read only
`list_job_history`	Read the call log	read only
`get_job_timeline`	History of recent weeks	read only
`list_failures`	List failed calls	read only
`list_folders`	List folders	read only
`list_monitors`	List server monitors	read only
`get_monitor`	View a server monitor	read only
`list_ssl_certificates`	View SSL certificates	read only
`list_contacts`	View notifications	read only
`list_status_pages`	List status pages	read only
`create_job`	Create a cronjob	changes things
`create_heartbeat`	Create a heartbeat	changes things
`update_job`	Change a cronjob	changes things
`set_job_active`	Switch on or off	changes things
`move_job`	Move to a folder	changes things
`delete_job`	Delete a cronjob	changes things
`create_folder`	Create a folder	changes things
`create_monitor`	Create a server monitor	changes things
`update_monitor`	Change a server monitor	changes things
`set_monitor_active`	Switch a monitor on or off	changes things
`delete_monitor`	Delete a server monitor	changes things
`add_contact`	Add an alert contact	changes things
`set_alert_recipients`	Choose who gets alerts	changes things
`create_status_page`	Create a status page	changes things
`update_status_page`	Change a status page	changes things
`delete_status_page`	Delete a status page	changes things
`run_job_now`	Run a cronjob now	changes things

The tools are labelled. Every tool is marked as „read only“ or „changes things“, so your assistant can answer read-only questions without asking and will check before deleting. Deleting a cronjob additionally requires naming it – an accident is impossible.

Heartbeats and end signals via AI

Your assistant also sets up monitoring – for jobs on your own server as well as for cronjobs that Cronjob.de calls.

“Set up a heartbeat for my nightly backup, it runs at 3am.”

Your assistant creates the heartbeat and gives you the line for your crontab. If the backup does not check in on time, we alert you.

“Check whether my cronjob ‘Export’ runs to the end.”

Your assistant switches on the end signal and gives you the line for the end of your script. If that report does not arrive after a call, we alert you.

More about heartbeats

Security

OAuth 2.1 with PKCE. No password in the assistant. You grant access in the browser, in your own session.
Access tokens last one hour, refresh tokens 30 days and rotate on every use. If one is used twice, the whole chain is revoked.
Only the hash is stored. Reading the database would not let anyone sign in.
Every change is logged – with time, tool and the person who triggered it. At most 60 changing calls per hour.
Disconnect at any time under „AI access“ in your account. The assistant then has to ask for access again.
Servers exclusively in the EU. The contracting party is a German company; for personal data there is a data processing agreement under Art. 28 GDPR.

Is there a REST API?

No – and that is a decision, not a gap. For this purpose MCP does more: you manage no keys, there is no endpoint documentation to reimplement and no version that breaks under your feet. The assistant gets tools, not URLs. And you give up nothing: everything you do in your account also works via MCP – cronjobs, heartbeats, server monitoring, SSL, notifications and status pages, reading as well as changing.

Sign-in without key management. OAuth 2.1 with PKCE, confirmed once in the browser. No token ageing in a configuration file.
From your own scripts it works with any MCP client – they exist for Python, TypeScript and other languages.
For servers without a browser there is a fixed token that does not expire. You find it in your account under „AI access“.

If you still need a classic interface, drop us a line saying what for. We will build it when enough people give the same reason.

It also works without your own assistant

You do not need a subscription with an AI provider. Your account contains an assistant that creates cronjobs from instructions – you paste the text, it fills in address, method and schedule. It is included in the free plan.

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