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Speech APIs

List TTS voices

Returns TTS voice names for one language.

Try in API Playground ↗Sign in to prepare and run this request.
GET/api/v1/tts/voices

Before you start

Choose the context and canonical language for your intended use.

Result

Select a public voice key from the response.

Charges and safe retries

Voice API prompts use the voice_api catalog; standalone synthesis uses speech_api.

Authentication

Send your account API key in the X-Api-Key header. Keep it on your server; never embed it in browser code.

Request examples

Replace the example values with your own inputs. Examples do not run on this page. Production requests can change your account or incur charges.

cURL

cURL
curl -X GET "https://api.illyvoip.com/api/v1/tts/voices?context=speech_api&language=en-US" \
  -H "X-Api-Key: ${ILLYVOIP_API_KEY:?Set ILLYVOIP_API_KEY}"

Node.js

Node.js
const response = await fetch("https://api.illyvoip.com/api/v1/tts/voices?context=speech_api&language=en-US", {
  method: "GET",
  headers: {
    "X-Api-Key": process.env.ILLYVOIP_API_KEY
  }
});

const data = await response.json();
console.log(response.status, data);

PHP

PHP
<?php
$ch = curl_init('https://api.illyvoip.com/api/v1/tts/voices?context=speech_api&language=en-US');
curl_setopt_array($ch, [
    CURLOPT_CUSTOMREQUEST => 'GET',
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_HTTPHEADER => [
        'X-Api-Key: ' . getenv('ILLYVOIP_API_KEY')
    ],
]);

$response = curl_exec($ch);
$status = curl_getinfo($ch, CURLINFO_HTTP_CODE);
curl_close($ch);

echo $status . PHP_EOL;
echo $response;

Python

Python
import os
import json
import requests

response = requests.request(
    "GET",
    "https://api.illyvoip.com/api/v1/tts/voices?context=speech_api&language=en-US",
    headers={
        "X-Api-Key": os.environ["ILLYVOIP_API_KEY"]
    },
)

print(response.status_code)
print(response.json())

Node.js examples run on the server (Node.js 22.17+). Python examples require requests; PHP examples require cURL. Set the environment variables referenced in each example.

Request parameters

Query parameters

contextstringoptional

Optional catalog context. Use speech_api for /api/v1/tts/* or voice_api for Voice API speak and gather.

languagestringoptional

TTS language using one of the canonical values returned by List TTS languages, such as en-US or de-DE.

Request behavior

Use this after List TTS languages. The returned voice names are the ones you should reuse in the same TTS context you requested.

Conditions and examples

Call List TTS languages first. Use context=speech_api for the dedicated TTS API or context=voice_api for Voice API speak/gather, then send one canonical language here such as en-US.

Response fields

  • status: Request outcome. Read the resource state separately; success does not always mean delivery or completion.
  • context: Catalog context, such as standalone speech or Voice API.
  • language: Canonical language code for this request or result.
  • default_voice: Default public voice key for the selected language and context.
  • voices: Available public voice keys and their descriptive properties.

HTTP responses

Expand a status to inspect its documented response format and examples. Example prices, IDs and timestamps are illustrative values, not quotes or account records.

200 Successful customer-facing response.

application/json

JSON
{
  "status": "success",
  "context": "speech_api",
  "language": "en-US",
  "default_voice": "illyvoip-emma",
  "voices": [
    {
      "voice": "illyvoip-emma",
      "label": "Emma",
      "language": "en-US"
    }
  ]
}
statusstringrequired
enum ["success"]
contextstringrequired
languagestringrequired
default_voicestringrequired
voicesarray<object>required
View nested fields

Array items

voicestringrequired
labelstringrequired
languagestringrequired

Additional properties: not allowed.

Additional properties: not allowed.

Full schema
Schema
{
  "type": "object",
  "additionalProperties": false,
  "properties": {
    "status": {
      "type": "string",
      "enum": [
        "success"
      ]
    },
    "context": {
      "type": "string"
    },
    "language": {
      "type": "string"
    },
    "default_voice": {
      "type": "string"
    },
    "voices": {
      "type": "array",
      "items": {
        "type": "object",
        "additionalProperties": false,
        "properties": {
          "voice": {
            "type": "string"
          },
          "label": {
            "type": "string"
          },
          "language": {
            "type": "string"
          }
        },
        "required": [
          "voice",
          "label",
          "language"
        ]
      }
    }
  },
  "required": [
    "status",
    "context",
    "language",
    "default_voice",
    "voices"
  ]
}
400 The request failed validation.

application/json

statusstringrequired
enum ["error"]
messagestringrequired
error_codestringoptional

Public incident or validation code when the endpoint provides one.

nullable true
fieldsobjectoptional

Public validation details when supplied by the endpoint.

Additional properties: not allowed.

Full schema
Schema
{
  "type": "object",
  "additionalProperties": false,
  "required": [
    "status",
    "message"
  ],
  "properties": {
    "status": {
      "type": "string",
      "enum": [
        "error"
      ]
    },
    "message": {
      "type": "string"
    },
    "error_code": {
      "type": "string",
      "nullable": true,
      "description": "Public incident or validation code when the endpoint provides one."
    },
    "fields": {
      "type": "object",
      "additionalProperties": true,
      "description": "Public validation details when supplied by the endpoint."
    }
  }
}
401 The API key or browser token is missing or invalid.

application/json

statusstringrequired
enum ["error"]
messagestringrequired
error_codestringoptional

Public incident or validation code when the endpoint provides one.

nullable true
fieldsobjectoptional

Public validation details when supplied by the endpoint.

Additional properties: not allowed.

Full schema
Schema
{
  "type": "object",
  "additionalProperties": false,
  "required": [
    "status",
    "message"
  ],
  "properties": {
    "status": {
      "type": "string",
      "enum": [
        "error"
      ]
    },
    "message": {
      "type": "string"
    },
    "error_code": {
      "type": "string",
      "nullable": true,
      "description": "Public incident or validation code when the endpoint provides one."
    },
    "fields": {
      "type": "object",
      "additionalProperties": true,
      "description": "Public validation details when supplied by the endpoint."
    }
  }
}
403 The account is not allowed to perform this operation.

application/json

statusstringrequired
enum ["error"]
messagestringrequired
error_codestringoptional

Public incident or validation code when the endpoint provides one.

nullable true
fieldsobjectoptional

Public validation details when supplied by the endpoint.

Additional properties: not allowed.

Full schema
Schema
{
  "type": "object",
  "additionalProperties": false,
  "required": [
    "status",
    "message"
  ],
  "properties": {
    "status": {
      "type": "string",
      "enum": [
        "error"
      ]
    },
    "message": {
      "type": "string"
    },
    "error_code": {
      "type": "string",
      "nullable": true,
      "description": "Public incident or validation code when the endpoint provides one."
    },
    "fields": {
      "type": "object",
      "additionalProperties": true,
      "description": "Public validation details when supplied by the endpoint."
    }
  }
}
429 The request rate limit was exceeded.

application/json

statusstringrequired
enum ["error"]
messagestringrequired
error_codestringoptional

Public incident or validation code when the endpoint provides one.

nullable true
fieldsobjectoptional

Public validation details when supplied by the endpoint.

Additional properties: not allowed.

Full schema
Schema
{
  "type": "object",
  "additionalProperties": false,
  "required": [
    "status",
    "message"
  ],
  "properties": {
    "status": {
      "type": "string",
      "enum": [
        "error"
      ]
    },
    "message": {
      "type": "string"
    },
    "error_code": {
      "type": "string",
      "nullable": true,
      "description": "Public incident or validation code when the endpoint provides one."
    },
    "fields": {
      "type": "object",
      "additionalProperties": true,
      "description": "Public validation details when supplied by the endpoint."
    }
  }
}
500 An unexpected service error occurred.

application/json

statusstringrequired
enum ["error"]
messagestringrequired
error_codestringoptional

Public incident or validation code when the endpoint provides one.

nullable true
fieldsobjectoptional

Public validation details when supplied by the endpoint.

Additional properties: not allowed.

Full schema
Schema
{
  "type": "object",
  "additionalProperties": false,
  "required": [
    "status",
    "message"
  ],
  "properties": {
    "status": {
      "type": "string",
      "enum": [
        "error"
      ]
    },
    "message": {
      "type": "string"
    },
    "error_code": {
      "type": "string",
      "nullable": true,
      "description": "Public incident or validation code when the endpoint provides one."
    },
    "fields": {
      "type": "object",
      "additionalProperties": true,
      "description": "Public validation details when supplied by the endpoint."
    }
  }
}
503 The service is temporarily unavailable.

application/json

statusstringrequired
enum ["error"]
messagestringrequired
error_codestringoptional

Public incident or validation code when the endpoint provides one.

nullable true
fieldsobjectoptional

Public validation details when supplied by the endpoint.

Additional properties: not allowed.

Full schema
Schema
{
  "type": "object",
  "additionalProperties": false,
  "required": [
    "status",
    "message"
  ],
  "properties": {
    "status": {
      "type": "string",
      "enum": [
        "error"
      ]
    },
    "message": {
      "type": "string"
    },
    "error_code": {
      "type": "string",
      "nullable": true,
      "description": "Public incident or validation code when the endpoint provides one."
    },
    "fields": {
      "type": "object",
      "additionalProperties": true,
      "description": "Public validation details when supplied by the endpoint."
    }
  }
}

Sandbox scenarios

Use https://sandbox-api.illyvoip.com with Sandbox credentials and the X-Illyvoip-Sandbox-Scenario header. Omit the header for the documented success default. This header belongs to sandbox requests.

success, not-found, rate-limited, forbidden, service-unavailable

Try this operation in Sandbox · Environment setup and limitations

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