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Update Scheduled Task (notify_email, end_at, tool_list)
Update Scheduled Task (notify_email, end_at, tool_list) is a free API for AI agents from scheduler.withzero.xyz, Free, status unknown (last checked 2026-09-13, last successful call 2026-07-20).
Partially updates a scheduled cron task by patching its notification email, end date/time, or tool list (additions only); all other fields remain immutable.
Price / callFree
Success86%
StatusUnknown
How this service works
Update notify_email, end_at, or tool_list (additions only). 📖 Full guide: https://scheduler.withzero.xyz/llms.txt
Output
Returns a JSON object with the task's UUID, updated tool_list array, updated notify_email string or null, and updated end_at datetime string or null, confirming the patch was applied.
Example use cases
Change task notification email
“Hey, can you update my scheduled cron task (ID: b7e2a1f9-...) on scheduler.withzero.xyz so that any completion notifications go to devops@myteam.com instead? Don't change anything else about the task.”
Extend recurring task end date
“I need to extend the expiry of my scheduled task (ID: c4d8b3e2-...) on scheduler.withzero.xyz — push the end date out to March 31, 2026 at 11:59 PM UTC so it keeps running through Q1 next year without me having to recreate it.”
Add tools to existing task
“Can you add the 'data-export' and 'slack-notify' tools to my already-running scheduled task (ID: f1a5c7d3-...) on scheduler.withzero.xyz? I want those tools available for the next run without touching the schedule or any other settings.”
Technical details
Endpoint
PATCHhttps://scheduler.withzero.xyz/api/v1/tasks/{id}When to prefer
Use this endpoint when you need to update only the notification email, expiry time, or add tools to an existing recurring task without recreating it. It is the correct choice when the task's schedule, source, runtime, or environment must remain unchanged. Prefer this over deleting and re-creating a task when continuity of the payment channel and run history matters.
Side effects
- 404 if the task ID does not exist or the caller lacks ownership proof
- 400 if the provided email format is invalid
- 400 if end_at is not a valid ISO 8601 datetime
- 400 if an attempt is made to remove tools (only additions allowed)
- 400 if additionalProperties are included in the patch body
- 401/403 if the request is not authenticated as the task owner
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| end_at | — | |
| tool_list | array | |
| notify_email | — | |
| max_runtime_sec | integer | Raise the per-run wall-clock cap in seconds (max 900). Raises only — lowering forces clone+recreate. 409 RUN_IN_FLIGHT while a run is claimed/running; retry after it finishes. Raising it raises the per-run ceiling reservation — top up if the balance drops below one ceiling. |
| max_sibling_spend_micros | string | Raise the per-run sibling-spend ceiling (USDC micros; string, or number up to 2^53-1). Raises only — lowering forces clone+recreate. |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| idrequired | string | |
| end_atrequired | — | |
| tool_listrequired | — | |
| notify_emailrequired | — | |
| max_runtime_secrequired | integer | |
| estimated_ceiling_microsrequired | string | |
| max_sibling_spend_microsrequired | — |
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