---
agentTools:
  projectIndex: https://open-api-docs.guesty.com/llms.txt
---

# 2026-05-11

*Deprecation tags added to legacy listings and reservations resources to indicate Guesty's intention to sunset them in the near future*

### Added

* Add the `isTest` flag to `GET /listings`, `POST /listings`, `GET /listings/{id}`, `PUT /listings/{id}`, `PUT /listings/{id}/availability-settings`, `GET /owners-reservations`, `GET /owners-reservations/{id}`, and `PUT /owners-reservations/{id}` responses to identify test properties
* Add `secondarySource` to `GET /reservations`, `POST /reservations`, `GET /reservations/{id}`, `PUT /reservations/{id}`, and `POST /reservations/{id}/invoiceItems` responses to expose the reservation website name when available
* Added `feeGroupName` to `GET /payment-transactions/reports/payouts-reconciliation` responses to expose the fee group name for payout reconciliation entries

### Changed

* Deprecate `GET /listings/{id}/custom-fields`, `PUT /listings/{id}/custom-fields`, `GET /listings/{id}/custom-fields/{field_id}`, and `DELETE /listings/{listing_id}/custom-fields/{field_id}`
* Deprecate `POST /reservations.csv` and `POST /reservations.email`