Returns contact profiles matching the supplied identifiers and optional trait filters. optIn..subscribed is true/false when known, or null when the channel has no status. Filter with true, false, or the sentinel null (e.g. optIn.voice.subscribed=null). The query value null is reserved for trait filters (including contactPhone/contactEmail): it matches SQL NULL or a missing jsonb path, not a stored string "null". Identifiers (phone, email, externalId, profileId) are exact matches only. Empty string (=) matches only stored '' and does not match SQL NULL/missing (use =null). contactPhone=null skips E.164 validation. In query strings, encode phone + as %2B (an unencoded + becomes a space and fails E.164 validation).
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Updated about 3 hours ago
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