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402utils ICS Calendar File Generator
x402
402utils ICS Calendar File Generator is a paid API for AI agents from 402utils.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-12).
Generates a strictly RFC 5545-conformant .ics calendar file from a list of events, handling text escaping, line folding, UID generation, and UTC timestamps.
Price / call$0.002
Success—
StatusUnknown
How this service works
Build a strictly RFC 5545-conformant .ics calendar file from a list of events: correct TEXT escaping, 75-octet line folding, generated UIDs, and unambiguous UTC timestamps (a per-event IANA timezone interprets naive wall-clock times). Supports all-day events, location, description and a passthrough RRULE. The fiddly conformance an agent shouldn't hand-roll.
Output
Returns a valid .ics (iCalendar) file with proper RFC 5545 formatting, including TEXT-escaped fields, 75-octet line folding, auto-generated UIDs, and unambiguous UTC DTSTART/DTEND timestamps. The file is ready to import into any calendar application.
Example use cases
Example prompt
“Create an .ics calendar file for our team sprint planning: a recurring weekly meeting called 'Sprint Planning' every Monday at 10am Europe/Berlin starting 2025-02-03, ending at 11am, with location 'Conf Room A' and description 'Weekly sprint kickoff'.”
Technical details
Endpoint
POSThttps://402utils.com/v1/ics?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a correctly spec-compliant .ics file without hand-rolling RFC 5545 escaping, UID generation, or UTC offset logic. Ideal for agents generating calendar invites, scheduling workflows, or exporting events for import into Google Calendar, Outlook, or Apple Calendar.
Side effects
- Missing required 'title' or 'start' field on an event returns a 400 validation error
- Invalid IANA timezone string causes timestamp conversion failure
- Malformed RRULE passthrough may produce non-importable calendar entries
- More than 100 events in a single request exceeds the allowed array limit
- Payment not included or invalid results in a 402 Payment Required response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| events | array | Events (1–100). |
| calendarName | string |
Output
Schema · Response
{
"type": "json",
"example": "BEGIN:VCALENDAR\r\nVERSION:2.0\r\n…\r\nEND:VCALENDAR\r\n"
}Tags
x402
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