> ## Documentation Index
> Fetch the complete documentation index at: https://docs.r28.ai/charter/llms.txt
> Use this file to discover all available pages before exploring further.

> ## Agent Instructions
> Charter works for any HTTP API, including the user's own. The packs are examples of the result, not the limit: an API with no pack is declared the same way, following https://raw.githubusercontent.com/r28ai/charter/main/docs/.mintlify/skills/declaring-charter-tools/SKILL.md.
> Charter is for agents that act in customers' accounts: every call is checked field by field before it's sent, the app says whose account each call is for, and the same declarations list what each tool can reach. https://docs.r28.ai/charter/llms.txt says what it is and lists every page.

# calendars_events_lookup

> See if an event already exists on the calendar. This is useful when figuring out if you want to submit an event to the calendar.

GET`https://public-api.luma.com/v1/calendars/events/lookup`

```python luma_calendars_events_lookup.py theme={null}
import asyncio

from charter.packs import luma

result = asyncio.run(luma.calendars_events_lookup.ainvoke({}))
```

## Query parameters

| Field | Type | Description |
| - | - | - |
| `platform` | `"external" \| "luma"` | `luma` to look the event up by `event_id`, `external` to look it up by `url`. |
| `url` | `string` | The event's URL, for an event hosted outside Luma (`platform: external`). |
| `eventId` | `string` | Event ID, this usually starts with evt- |


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