Poll for messages
Forward feed of messages created after since, oldest first. A fallback for callers that cannot host a webhook. Track the returned nextSince and pass it back to advance. Defaults to inbound only. since is millisecond-granular; for guaranteed no-skip delivery prefer the whatsapp_message_received webhook.
Authorizations
User ID to act on behalf of. Platform API Keys only (required with an API Key unless the endpoint states otherwise). Requests authenticated with a Personal Access Token are rejected if this header names another user.
Query Parameters
ISO 8601 timestamp. Returns messages strictly after it.
"2026-06-25T10:00:00.000Z"
Defaults to inbound. Use all for both directions.
inbound, outbound, all