---
schema_version: "1"
id: fd263115a67b0e6b6000ebd6c5fd6ca2ab30ec1d2fee6bad259828c0b92fc16c
title: REST API
collection: admin
version: current
locale: en-us
portal_url: https://docs.salesforce.com/admin/current/en-us/release-notes/260-0-0/rn_api_rest.md
canonical_url: https://help.salesforce.com/s/articleView?id=release-notes.rn_api_rest.htm&release=260&type=5
source_site: help.salesforce.com
content_type: documentation
content_hash: 640f387c717f6373ff42d9087d2784c0cccb135f21d84c8325ab9ac63827a1c2
description: These calls are new, changed, or deprecated in Platform REST API version 66.0.
products:
  - Cross Cloud Packages Solutions
release: "260"
---
# REST API

These calls are new, changed, or deprecated in Platform REST API version 66.0.

## New Calls

Convert Base64 audio to text using the Convert Base64 Speech To Text invocable action

Make a POST request to the new /services/data/v66.0/actions/standard/voiceToText resource to convert Base64-encoded audio to text and return the transcription as output.

Convert text to audio using the TextToSpeech invocable action (Beta)

Make a POST request to the new /services/data/v66.0/actions/standard/textToSpeech resource to convert text to a Base64-encoded audio string.

Convert audio files to text using the SpeechToText invocable action

Make a POST request to the new /services/data/v66.0/actions/standard/speechToText resource to convert an audio file to text and return the transcription as output.

## Changed Calls

Add file output support to the TextToSpeech invocable action (Beta)

The TextToSpeech action now supports an optional fileOutput parameter to return generated audio as a file output. By default, the response continues to return a Base64-encoded audio string.

Monitor query limit usage for scheduled flows and scheduled paths

Make a GET request to the existing /services/data/vXX.X/limits resource to obtain the new ScheduledFlowRunLimit and ScheduledPathRunLimit values.