REST API Developer Guide

Introduction to REST API
Quick Start
Examples
Generating an OpenAPI 3.0 Document for sObjects REST API (Beta)
Reference
Versions
Resources by Version
Limits
Describe Global
sObject Basic Information
sObject Describe
sObject Get Deleted
sObject Get Updated
sObject Named Layouts
sObject Rows
sObject Rows by External ID
sObject Blob Retrieve
sObject ApprovalLayouts
sObject Single Approval Process
sObject CompactLayouts
sObject Layouts
sObject Layouts for an Object With Multiple Record Types
sObject Global Publisher Layouts
sObject PlatformAction
sObject Quick Actions
sObject Rich Text Image Retrieve
sObject Relationships
sObjects Suggested Articles
sObjects Suggested Articles by ID
sObject User Password
Platform Event Schema by Event Name
Platform Event Schema by Schema ID
Retrieve AppMenu Types
AppMenu Items
AppMenu Mobile Items
Compact Layouts
Consent
Consent Write
Embedded Service Configuration Describe
Invocable Actions
Invocable Actions Custom
Retrieve Custom Invocable Actions
Return HTTP Headers for Custom Invocable Actions
Invocable Actions Standard
List View Describe
List View Results
List Views
Support Knowledge with REST API
Parameterized Search
Portability
Process Approvals
Process Rules
Process Rule for an sObject
Process Rule List for an sObject
Product Schedules
Query
Query More Results
QueryAll
QueryAll More Results
Query Performance Feedback (Beta)
Quick Actions
Recent List Views
Recently Viewed Items
Record Count
sObject Relevant Items
Retrieve Knowledge Language Settings
Search
Search Scope and Order
Search Result Layouts
Lightning Toggle Metrics
Lightning Usage by App Type
Lightning Usage by Browser
Lightning Usage by Page
Lightning Usage by FlexiPage
Lightning Exit by Page Metrics
Salesforce Scheduler Resources
Search for Records Suggested by Autocomplete and Instant Results
Search Suggested Article Title Matches
Search Suggested Queries
Salesforce Surveys Translation Resources
Tabs
Themes
Composite Resources
PDF

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Return HTTP Headers for Custom Invocable Actions

Returns only the headers that are returned by sending a GET request to the custom invocable actions resource. This gives you a chance to see returned header values of the GET request before retrieving the content
URI
/services/data/vXX.X/actions/custom
Available since release
32.0
Formats
JSON, XML
HTTP Methods
HEAD
Authentication
Authorization: Bearer token
Request parameters
None required
Example usage
1curl https://MyDomainName.my.salesforce.com/services/data/v56.0/actions/custom
Example response body
1HTTP/1.1 200 OK 
2Date: Mon, 21 Nov 2022 22:56:26 GMT