Calendar Listing API
Separate calendar containers from events, keep recurring occurrences distinct, and make date boundaries predictable.
Start with the record.
Keep what matters.
A calendar listing API can describe two different operations: finding the calendars a person can access, or listing the events inside a particular calendar. That distinction should shape the integration from the beginning. A calendar is a container with its own identity and access rules. An event is a scheduled item inside that container, and a recurring series can produce several visible occurrences.
A simple field model
These illustrative fields are a starting point for your own design. They are not a live ListAPI.com API contract and should not be substituted for a provider’s documented request format.
| Illustrative field | What it should tell you |
|---|---|
calendar_id | The container that owns the event. |
event_id | The event identity within that calendar. |
start / end | Timed or all-day boundaries, kept distinct. |
time_zone | The named zone used for a local schedule. |
A useful starting point
Write the user's question before choosing an endpoint. “Which calendars are available?” is different from “What happens next week?” The first needs calendar metadata. The second needs events from one or more selected calendars. Avoid treating a calendar listing as proof that every event field can be read. The effective access may differ by calendar and by the information being requested.
Keep source account, calendar identifier, and event identifier together. An event ID that looks unique in a small test should not become a global key without a documented guarantee. If a user connects two accounts, the integration must know which account owns each record. This also makes disconnection safer because you can remove the correct account's cached material without disturbing another calendar connection.
Before you connect the list
Identify the source of truth and the intended audience. Start with a small read-only view so you can compare the result with the source. Record the retrieval scope and keep incomplete imports visible instead of treating a partial result as the whole collection.
Choose how to handle a renamed record, a repeated request, a removed item, and lost access. Make field ownership explicit before adding two-way edits. The full guide explores the decisions specific to this list type and links to an official reference.