GET/api/v6/callblasting/voices

List available voices

Filterable catalog of voices for call synthesis.

Scope

API key with the callblasting service enabled

Usage limit

120 requests per minute

Returns the catalog of voices available for Call Blasting text-to-speech. Each voice carries a stable code you then send in the voice field when creating a call with text.

code: Identifier you send in the call.
name: Display name of the voice.
language: Language and region in BCP-47.
accent: Accent of the voice.
gender: female or male.
tier: Quality level: basic, intermediate or advanced.
sampleRate: Sample rate in Hz.

The catalog rarely changes, so caching it on your side is worth it.

Query parameters

language

stringoptional

Filter by language and region (BCP-47), for example es-US or en-US.

tier

stringoptional

Filter by voice quality level.

basicintermediateadvanced

gender

stringoptional

Filter by voice gender.

femalemale

Responses

200

Voice catalog, filtered when parameters were sent.

{
  "success": true,
  "data": {
    "voices": [
      {
        "code": "es-us-female-2",
        "name": "Valentina · Español Latinoamérica",
        "language": "es-US",
        "accent": "Español Latinoamérica",
        "gender": "female",
        "tier": "intermediate",
        "sampleRate": 8000
      },
      {
        "code": "es-us-male-7",
        "name": "Nicolás · Español Latinoamérica",
        "language": "es-US",
        "accent": "Español Latinoamérica",
        "gender": "male",
        "tier": "advanced",
        "sampleRate": 8000
      }
    ]
  },
  "meta": {
    "requestId": "8f0c0e2a4b1d4c8fae2b7a91e0c5d3f6",
    "timestamp": "2026-06-23T15:04:05+00:00",
    "responseTimeMs": 1.4
  }
}

401

Invalid or missing credentials.

403

The API key does not have the callblasting service enabled.

429

Request limit exceeded.

Possible errors

Codes this endpoint can return in error.code. The full detail lives in the catalog.

401AUTH_REQUIREDNo Bearer token was sent, and every call requires one.401AUTH_INVALID_KEYThe API key is not recognized: wrong format, revoked or expired.401AUTH_SERVICE_NOT_ALLOWEDThe key is not allowed to use the service behind this endpoint.429RATE_TPS_EXCEEDEDYou exceeded your organization quota for this endpoint.

See the full catalog

Scope and limits

Query parameters

Responses

Possible errors