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Version latestkeyboard_arrow_down Reference documentation and code samples for the Google API Core Client class ApiKeyHeaderCredentials.
The ApiKeyHeaderCredentials object provides a wrapper around an API key.
Namespace Google \ ApiCore Methods ApiKeyHeaderCredentials constructor.
Parameters Name Description apiKey string The API key to set in the header for the request
quotaProject string|null The quota project associated with the API key.
Returns Type Description string|nullThe quota project associated with the credentials.
Parameter Name Description unusedAudience string|null audiences are not supported for API keys.
Returns Type Description callable|nullCallable function that returns the API key header.
checkUniverseDomain Verify that the expected universe domain matches the universe domain from the credentials.
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Last updated 2025-10-10 UTC.
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