RRULE recurrence expander — generate bounded RFC 5545 iCalendar occurrences in IANA timezo
RRULE recurrence expander — generate bounded RFC 5545 iCalendar occurrences in IANA timezones with windows, work limits, and daylight-saving (DST) policies.
5000 (raw units)
price
2
calls / 30d
1
unique payers
2026-09-15
updated
Provider
schedule-tools.use.x402atlas.com · discovered, not yet claimed by its owner
Payment (x402 accepts[])
[
{
"scheme": "exact",
"network": "eip155:8453",
"payTo": "0x8C128f1Ee62Bb5e47867CfbAe2ad89be325Df1b2",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"amount": "5000",
"maxTimeoutSeconds": 300
},
{
"scheme": "exact",
"network": "eip155:137",
"payTo": "0x8C128f1Ee62Bb5e47867CfbAe2ad89be325Df1b2",
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"amount": "5000",
"maxTimeoutSeconds": 300
},
{
"scheme": "exact",
"network": "eip155:42161",
"payTo": "0x8C128f1Ee62Bb5e47867CfbAe2ad89be325Df1b2",
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"amount": "5000",
"maxTimeoutSeconds": 300
}
]Output schema
{
"bazaar": {
"category": "calendar",
"info": {
"input": {
"body": {
"ambiguous_time": "reject",
"dtstart_local": "1997-09-02T09:00:00",
"limit": 8,
"nonexistent_time": "reject",
"rrule": "FREQ=WEEKLY;COUNT=10;BYDAY=TU,TH",
"timezone": "America/New_York",
"window_end": "1997-10-01T00:00:00-04:00",
"window_start": "1997-09-02T09:00:00-04:00"
},
"bodyType": "json",
"method": "POST",
"type": "http"
},
"output": {
"example": {
"algorithm_version": "schedule-v1",
"ambiguous_time": "reject",
"dtstart_local": "1997-09-02T09:00:00",
"go_toolchain_version": "go1.26.3",
"iana_tzdata_version": "2026a",
"limit": 8,
"nonexistent_time": "reject",
"normalized_rrule": "FREQ=WEEKLY;INTERVAL=1;COUNT=10;BYDAY=TU,TH;WKST=MO",
"occurrence_count": 8,
"occurrences": [
{
"local": {
"abbreviation": "EDT",
"local_time": "1997-09-02T09:00:00-04:00",
"offset_seconds": -14400,
"timezone": "America/New_York"
},
"utc": "1997-09-02T13:00:00Z"
},
{
"local": {
"abbreviation": "EDT",
"local_time": "1997-09-04T09:00:00-04:00",
"offset_seconds": -14400,
"timezone": "America/New_York"
},
"utc": "1997-09-04T13:00:00Z"
},
{
"local": {
"abbreviation": "EDT",
"local_time": "1997-09-09T09:00:00-04:00",
"offset_seconds": -14400,
"timezone": "America/New_York"
},
"utc": "1997-09-09T13:00:00Z"
},
{
"local": {
"abbreviation": "EDT",
"local_time": "1997-09-11T09:00:00-04:00",
"offset_seconds": -14400,
"timezone": "America/New_York"
},
"utc": "1997-09-11T13:00:00Z"
},
{
"local": {
"abbreviation": "EDT",
"local_time": "1997-09-16T09:00:00-04:00",
"offset_seconds": -14400,
"timezone": "America/New_York"
},
"utc": "1997-09-16T13:00:00Z"
},
{
"local": {
"abbreviation": "EDT",
"local_time": "1997-09-18T09:00:00-04:00",
"offset_seconds": -14400,
"timezone": "America/New_York"
},
"utc": "1997-09-18T13:00:00Z"
},
{
"local": {
"abbreviation": "EDT",
"local_time": "1997-09-23T09:00:00-04:00",
"offset_seconds": -14400,
"timezone": "America/New_York"
},
"utc": "1997-09-23T13:00:00Z"
},
{
"local": {
"abbreviation": "EDT",
"local_time": "1997-09-25T09:00:00-04:00",
"offset_seconds": -14400,
"timezone": "America/New_York"
},
"utc": "1997-09-25T13:00:00Z"
}
],
"operation": "rrule-expand",
"timezone": "America/New_York",
"tzdata_source": "bridge-embedded",
"warnings": [],
"window_end": "1997-10-01T04:00:00Z",
"window_start": "1997-09-02T13:00:00Z",
"work": {
"candidate_occurrences": 8,
"combination_checks": 52,
"periods_checked": 4
}
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"ambiguous_time": {
"description": "Policy for repeated civil occurrences",
"enum": [
"earlier",
"later",
"reject"
],
"type": "string"
},
"dtstart_local": {
"description": "Civil DTSTART in YYYY-MM-DDTHH:MM:SS",
"pattern": "^[0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}$",
"type": "string"
},
"limit": {
"description": "Maximum occurrences to return",
"maximum": 100,
"minimum": 1,
"type": "integer"
},
"nonexistent_time": {
"description": "Policy for skipped civil occurrences",
"enum": [
"reject",
"shift_forward"
],
"type": "string"
},
"rrule": {
"description": "One RFC5545 RRULE using the documented bounded V1 subset",
"maxLength": 2048,
"minLength": 10,
"type": "string"
},
"timezone": {
"description": "UTC or IANA area/location name",
"maxLength": 128,
"minLength": 3,
"type": "string"
},
"window_end": {
"description": "Exclusive RFC3339 whole-second window end within the five- and ten-year ceilings",
"format": "date-time",
"type": "string"
},
"window_start": {
"description": "Inclusive RFC3339 whole-second window start at or after DTSTART",
"format": "date-time",
"type": "string"
}
},
"required": [
"dtstart_local",
"timezone",
"rrule",
"window_start",
"window_end",
"limit",
"ambiguous_time",
"nonexistent_time"
],
"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"
},
"output": {
"properties": {
"example": {
"additionalProperties": false,
"properties": {
"_atlas": {
"additionalProperties": false,
"description": "Atlas documentation and related-route metadata added after deployment",
"properties": {
"docs": {
"description": "Documentation URL for this bridge",
"format": "uri",
"maxLength": 512,
"type": "string"
},
"related": {
"description": "Bounded related Atlas routes",
"items": {
"additionalProperties": false,
"description": "One related Atlas route",
"properties": {
"bridge": {
"description": "Related bridge name",
"maxLength": 64,
"type": "string"
},
"docs": {
"description": "Related bridge documentation URL",
"format": "uri",
"maxLength": 512,
"type": "string"
},
"summary": {
"description": "Short capability summary",
"maxLength": 256,
"type": "string"
},
"url": {
"description": "Related route URL",
"format": "uri",
"maxLength": 512,
"type": "string"
}
},
"required": [
"bridge",
"url",
"docs",
"summary"
],
"type": "object"
},
"maxItems": 3,
"type": "array"
}
},
"required": [
"docs"
],
"type": "object"
},
"algorithm_version": {
"const": "schedule-v1",
"description": "Pinned RFC subset and timezone-resolution contract",
"type": "string"
},
"ambiguous_time": {
"description": "Applied DST-fold policy",
"enum": [
"earlier",
"later",
"reject"
],
"type": "string"
},
"dtstart_local": {
"description": "Civil DTSTART anchor",
"type": "string"
},
"go_toolchain_version": {
"const": "go1.26.3",
"description": "Reviewed Go toolchain",
"type": "string"
},
"iana_tzdata_version": {
"const": "2026a",
"description": "Reviewed IANA timezone release",
"type": "string"
},
"limit": {
"description": "Maximum requested result count",
"maximum": 100,
"minimum": 1,
"type": "integer"
},
"nonexistent_time": {
"description": "Applied DST-gap policy",
"enum": [
"reject",
"shift_forward"
],
"type": "string"
},
"normalized_rrule": {
"description": "Canonical supported RRULE parts and defaults",
"type": "string"
},
"occurrence_count": {
"description": "Number of returned occurrences",
"maximum": 100,
"minimum": 0,
"type": "integer"
},
"occurrences": {
"description": "Occurrences in ascending instant order; [] when none fall in the window",
"items": {
"additionalProperties": false,
"description": "One resolved recurrence occurrence",
"properties": {
"local": {
"additionalProperties": false,
"description": "Localized representation",
"properties": {
"abbreviation": {
"description": "Display-only abbreviation",
"type": "string"
},
"local_time": {
"description": "RFC3339 local form with numeric offset",
"format": "date-time",
"type": "string"
},
"offset_seconds": {
"description": "UTC offset seconds",
"maximum": 86400,
"minimum": -86400,
"type": "integer"
},
"timezone": {
"description": "IANA timezone",
"type": "string"
}
},
"required": [
"local_time",
"timezone",
"offset_seconds",
"abbreviation"
],
"type": "object"
},
"utc": {
"description": "UTC instant",
"format": "date-time",
"type": "string"
}
},
"required": [
"utc",
"local"
],
"type": "object"
},
"maxItems": 100,
"type": "array"
},
"operation": {
"const": "rrule-expand",
"description": "Stable route operation",
"type": "string"
},
"timezone": {
"description": "IANA timezone used for recurrence resolution",
"type": "string"
},
"tzdata_source": {
"const": "bridge-embedded",
"description": "Timezone data source",
"type": "string"
},
"warnings": {
"description": "Distinct DST gap shift warnings; [] when no shift occurred",
"items": {
"description": "Warning",
"type": "string"
},
"maxItems": 100,
"type": "array"
},
"window_end": {
"description": "Normalized exclusive UTC window end",
"format": "date-time",
"type": "string"
},
"window_start": {
"description": "Normalized inclusive UTC window start",
"format": "date-time",
"type": "string"
},
"work": {
"additionalProperties": false,
"description": "Cooperative bounded-iteration counters",
"properties": {
"candidate_occurrences": {
"description": "Rule occurrences emitted before window filtering",
"maximum": 100000,
"minimum": 0,
"type": "integer"
},
"combination_checks": {
"description": "Rule-period and BY-part checks",
"maximum": 1000000,
"minimum": 0,
"type": "integer"
},
"periods_checked": {
"description": "Frequency periods visited",
"minimum": 0,
"type": "integer"
}
},
"required": [
"candidate_occurrences",
"combination_checks",
"periods_checked"
],
"type": "object"
}
},
"required": [
"operation",
"algorithm_version",
"tzdata_source",
"go_toolchain_version",
"iana_tzdata_version",
"dtstart_local",
"timezone",
"normalized_rrule",
"window_start",
"window_end",
"limit",
"ambiguous_time",
"nonexistent_time",
"occurrences",
"occurrence_count",
"work",
"warnings"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
},
"tags": [
"rrule",
"recurrence-expansion",
"rfc5545",
"iana-timezone",
"dst"
]
}
}Use it
curl
curl "https://schedule-tools.use.x402atlas.com/rrule-expand" # -> 402 Payment Required, accepts[] lists how to pay # retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid
JavaScript
const res = await fetch("https://schedule-tools.use.x402atlas.com/rrule-expand");
if (res.status === 402) {
const { accepts } = await res.json();
// pay one of accepts[] via an x402 client, then retry with the payment header
}Python
import httpx
res = httpx.get("https://schedule-tools.use.x402atlas.com/rrule-expand")
if res.status_code == 402:
accepts = res.json()["accepts"]
# pay one of accepts[] via an x402 client, then retry with the payment headerMachine-readable
Everything on this page is also available as clean JSON at /resources/4484.json, and this resource appears in /discovery/resources and /discovery/search.