Add custom headers to external credentials to cover more use cases and security
requirements. With custom headers, you can set your own parameters for
authentication.
Required Editions
Available in: both Salesforce Classic (not available in all orgs) and Lightning
Experience
Available in: all editions
Custom headers are a way for a remote system to define parameters it needs as input to
respond to a request. Using a custom header is similar to having a function in a piece of
code and defining input parameters or arguments that allow the caller to provide input.
You can add custom headers to named credentials and external credentials. In most cases,
it’s best to associate headers with the external credential, rather than the named
credential, because external credentials are meant to encapsulate authentication details.
For example, define custom authorization headers in an external credential to use consistent
authentication across all named credential endpoints using the same external credential.
Use Cases for Custom Headers with Named Credentials Custom headers are most often used for security or authentication purposes. The HTTP standard includes a commonly used, dedicated Authorization header. However, many use cases require something else. Two common use cases are per-user callouts and API keys.
Use API Keys in Custom Headers with Named Credentials Web services often define their own authentication protocols using custom headers. For those cases, you can create a custom header for a named or external credential and use API keys as a password.
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