Expand an RRULE recurrence rule into its occurrence datetimes, with a human-read
Expand an RRULE recurrence rule into its occurrence datetimes, with a human-readable description.
Answeringour last check, 2026-09-24
1 of 1checks answered this week
472 msmedian answer time
$0.002listed price per call
$0.002price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
POST https://ical.openverbs.com/v1/expand
| Category | Everything else |
|---|---|
| Provider host | ical.openverbs.com |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 3 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-09-24 | valid payment request | 402 | $0.002 | 472 ms |
Example input (from the provider)
{
"body": {
"dtstart": "example",
"from": "example",
"rrule": "example"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"dtstart": {
"description": "ISO start datetime, when not embedded in `rrule`.",
"type": "string"
},
"from": {
"description": "ISO window start (inclusive). Provide with `to`.",
"type": "string"
},
"limit": {
"description": "Max occurrences to return. Defaults to 50.",
"maximum": 1000,
"minimum": 1,
"type": "integer"
},
"rrule": {
"description": "RRULE, e.g. \"FREQ=WEEKLY;BYDAY=WE;COUNT=3\" (DTSTART lines allowed).",
"maxLength": 2000,
"minLength": 1,
"type": "string"
},
"to": {
"description": "ISO window end (inclusive). Provide with `from`.",
"type": "string"
}
},
"required": [
"rrule"
],
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}