Media

Pre-upload-once media so you can fan a single image / audio / document to many recipients without re-uploading every time.

{ "source_url": "https://cdn.example.com/promo.jpg", "mime_type": "image/jpeg" }

Returns { media_id, media_url, mime_type, size }. Plug media_url into any subsequent message-send body's media_url field. The 25 MB cap matches the per-message cap WhatsApp enforces for audio / document.

Inbound media flows through a signed proxy at GET /v1/media/:token — the token is the authorisation, so your front-end can hot-link to it without exposing API keys.