Voice Memos

Voice memos are sent through a dedicated endpoint. On iMessage, they render with the native inline audio player — the voice-memo bubble you get when recording in the Messages app. On RCS and SMS, this endpoint falls back to a regular audio attachment, which is the same result you’d get from sending the audio as a media part via the standard send-message flow. In practice the endpoint is useful when you specifically want the iMessage voice-memo affordance for iMessage-capable recipients; for RCS/SMS delivery you can use either path (see Protocol Selection).

Sending a voice memo

The request body takes a single field, voice_memo_url, which must be a publicly accessible HTTPS URL. There is no attachment_id alternative — voice memos are always URL-sourced. See the Send Voice Memo API reference for the full endpoint specification.

curl -X POST https://api.linqapp.com/api/partner/v3/chats/{chat_id}/voicememo \
  -H "Authorization: Bearer $LINQ_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "voice_memo_url": "https://example.com/voice-memo.m4a"
  }'

await client.chats.sendVoicememo(chatId, {
  voice_memo_url: 'https://example.com/voice-memo.m4a',
});

client.chats.send_voicememo(
    chat_id,
    voice_memo_url="https://example.com/voice-memo.m4a",
)

Supported audio formats

Format	MIME type
MP3	audio/mpeg
M4A	audio/x-m4a, audio/mp4
AAC	audio/aac
CAF	audio/x-caf
WAV	audio/wav
AIFF	audio/aiff, audio/x-aiff
AMR	audio/amr

Notes

• iMessage-specific affordance — The inline voice-memo bubble is iMessage-only. On RCS and SMS this endpoint delivers the audio as a regular attachment, equivalent to sending a media part via the standard send-message flow — use whichever path is more convenient for those recipients.
• HTTPS required — The source URL must be publicly reachable with a valid TLS certificate. The API downloads the file before sending.
• File size — The 10 MB direct-URL limit applies. Larger files should be hosted on a CDN you control.
• Webhooks — Voice memo delivery is confirmed via the standard message.sent / message.delivered / message.failed events. See Webhooks.