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

# Technical Notes

### Base URL

Production: `https://api.penelope.health`

Sandbox: `https://api-sandbox.penelope.health`

### Pagination

All list endpoints return **20 results** by default, configurable up to **100** via the `limit` parameter.

In the sandbox environment, endpoints return a fixed set of results with **no pagination** — `limit` and `offset` parameters are ignored. All endpoints return a maximum of **20 results**, except the [List Payers](/api-reference/list-payers) endpoint.

### Date & Time Formats

* **Dates**: ISO 8601 date format (`YYYY-MM-DD`)
  * Example: `2025-01-07`
* **Timestamps**: ISO 8601 datetime format with UTC timezone (`YYYY-MM-DDTHH:MM:SSZ`)
  * Example: `2025-01-07T14:32:15Z`

### Rate Limits

Sandbox endpoints are rate-limited to **100 requests per minute** per API key. When exceeded, the API returns a `429 Too Many Requests` response with a `Retry-After` header.