Add contacts to a static segment by email
id (string, required): Segment IDemails must be a non-empty array of valid email addresses.added: Number of emails that matched contacts in the project.notFound: Input emails that were not found in the project.STATIC segments.DYNAMIC segment returns 400.API Key authentication. Secret keys (sk_*) are required for all endpoints except /v1/track. Public keys (pk_*) only work with the /v1/track endpoint for client-side event tracking. The project is automatically derived from the key.
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