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No Credit Cost

This endpoint doesn't consume Apollo credits. Learn more about API pricing and credits.

This endpoint is deprecated. To achieve the same result, use the Fields endpoint (use source: custom to get custom fields only).

Use the Get a List of Custom Fields endpoint to retrieve information about all of the custom fields that have been created in your Apollo account.

This endpoint doesn't require any parameters.

This endpoint requires a master API key. If you call the endpoint without a master key, you receive a 403 response. Check out Create an API Key to learn how to create a master key.