Voice

The voice source indexes your account’s persisted voice call transcriptions. Calls become searchable minutes after they end — there is nothing to sync.

Attach the Source

curl -X POST https://api.telnyx.com/v2/ai/collections/{uuid}/sources \
  -H "Authorization: Bearer $TELNYX_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{ "source_type": "voice" }'

The source indexes every persisted voice transcription on the account. A collection over an account with no persisted transcriptions returns empty results — enable persistence first.

Enable Voice Transcript Persistence

Voice transcripts are persisted per SIP connection. Set conversation_persistence to true on each connection whose calls you want transcribed, stored, and indexed:

curl -X PATCH https://api.telnyx.com/v2/credential_connections/{id} \
  -H "Authorization: Bearer $TELNYX_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{ "conversation_persistence": true }'

The same field exists on all supported connection types:

Connection type	Endpoint
Credential connections	`PATCH /v2/credential_connections/{id}`
IP connections	`PATCH /v2/ip_connections/{id}`
FQDN connections	`PATCH /v2/fqdn_connections/{id}`

Verify with a GET on the connection — the response includes conversation_persistence. Set it to false to stop persisting new calls. From then on, every call handled by that connection is transcribed and indexed automatically. Persisted records include 30 days of indexed retention — see Pricing for extended retention.

What a Result Looks Like

Voice chunks carry record_type: "voice" plus the call’s identifiers and timestamps:

{
  "id": "e30570b6-68d5-11f1-838c-02420a0ddb20:0",
  "record_id": "e30570b6-68d5-11f1-838c-02420a0ddb20",
  "chunk_index": 0,
  "chunk_total": 1,
  "text": "...The refund of $200 has been deposited back in your account...",
  "score": 0.904,
  "record_type": "voice",
  "record_created_at": "2026-06-15T16:18:49.981698+00:00",
  "ingested_at": "2026-06-15T16:20:12.170251+00:00",
  "metadata": { "source": "Trunking" }
}

Narrow searches to calls with sources=voice or filter on record fields — see Search.

Search

Concepts

Configuration

API

For AI Agents

Attach the Source

Enable Voice Transcript Persistence

What a Result Looks Like

​Attach the Source

​Enable Voice Transcript Persistence

​What a Result Looks Like

Attach the Source

Enable Voice Transcript Persistence

What a Result Looks Like