> This is a page from the ElevenLabs documentation. For a complete page index, fetch https://elevenlabs.io/docs/llms.txt. For the full documentation in a single file, fetch https://elevenlabs.io/docs/llms-full.txt. # Create Speech Generation POST https://api.elevenlabs.io/v1/flows/text-to-speech Content-Type: application/json Start a speech generation with the selected model. Charged per character via text-to-speech billing. Use this over `/v1/text-to-speech` for the asynchronous generation lifecycle or for models not offered there; for direct, synchronous speech synthesis, prefer `/v1/text-to-speech`. Reference: https://elevenlabs.io/docs/api-reference/flows/text-to-speech/create ## Servers - `https://api.elevenlabs.io` (Production, default) - `https://api.us.elevenlabs.io` (Production US) - `https://api.eu.residency.elevenlabs.io` (Production EU) - `https://api.in.residency.elevenlabs.io` (Production India) - `https://api.sg.residency.elevenlabs.io` (Production Singapore) ## Request ### Body (application/json) This endpoint expects a TextToSpeechGenerationRequest. - `TextToSpeechGenerationRequest` - `model_id`: `eleven_flash_v2_5` (ElevenFlashV2_5Request) - `text` (string, required) — The text to synthesize into speech. - `voice` (string, required) — The ID of the voice to speak with. - `language_code` (string, optional, nullable) — ISO 639-1 language code to enforce on the output. Omit to detect the language from the text. - `output_format` (enum, optional, default: mp3_44100_128) — The audio encoding of the output, as `codec_sampleRateHz_bitrateKbps`. `mp3_44100_192` requires the Creator tier or above. - Allowed values: `mp3_22050_32`, `mp3_24000_48`, `mp3_44100_32`, `mp3_44100_64`, `mp3_44100_96`, `mp3_44100_128`, `mp3_44100_192` - `pronunciation_dictionary_locators` (list of PronunciationDictionaryVersionLocator, optional) — Pronunciation dictionaries to apply to the text, in order of precedence. Up to 3. - `voice_settings` (ElevenFlashV2_5VoiceSettings, optional, nullable) — Overrides for the voice's saved settings, applied to this generation only. - `webhook` (WebhookTarget, optional, nullable) — Include to send the generation's result to the workspace's configured flows webhooks once it completes or fails. The webhook payload matches the terminal response of the corresponding GET endpoint. - `model_id`: `eleven_multilingual_v2` (ElevenMultilingualV2Request) - `text` (string, required) — The text to synthesize into speech. - `voice` (string, required) — The ID of the voice to speak with. - `output_format` (enum, optional, default: mp3_44100_128) — The audio encoding of the output, as `codec_sampleRateHz_bitrateKbps`. `mp3_44100_192` requires the Creator tier or above. - Allowed values: `mp3_22050_32`, `mp3_24000_48`, `mp3_44100_32`, `mp3_44100_64`, `mp3_44100_96`, `mp3_44100_128`, `mp3_44100_192` - `pronunciation_dictionary_locators` (list of PronunciationDictionaryVersionLocator, optional) — Pronunciation dictionaries to apply to the text, in order of precedence. Up to 3. - `voice_settings` (TtsVoiceSettings, optional, nullable) — Overrides for the voice's saved settings, applied to this generation only. - `webhook` (WebhookTarget, optional, nullable) — Include to send the generation's result to the workspace's configured flows webhooks once it completes or fails. The webhook payload matches the terminal response of the corresponding GET endpoint. - `model_id`: `eleven_v3` (ElevenV3Request) - `text` (string, required) — The text to synthesize into speech. - `voice` (string, required) — The ID of the voice to speak with. - `language_code` (string, optional, nullable) — ISO 639-1 language code to enforce on the output. Omit to detect the language from the text. - `output_format` (enum, optional, default: mp3_44100_128) — The audio encoding of the output, as `codec_sampleRateHz_bitrateKbps`. `mp3_44100_192` requires the Creator tier or above. - Allowed values: `mp3_22050_32`, `mp3_24000_48`, `mp3_44100_32`, `mp3_44100_64`, `mp3_44100_96`, `mp3_44100_128`, `mp3_44100_192` - `pronunciation_dictionary_locators` (list of PronunciationDictionaryVersionLocator, optional) — Pronunciation dictionaries to apply to the text, in order of precedence. Up to 3. - `voice_settings` (ElevenV3VoiceSettings, optional, nullable) — Overrides for the voice's saved settings, applied to this generation only. - `webhook` (WebhookTarget, optional, nullable) — Include to send the generation's result to the workspace's configured flows webhooks once it completes or fails. The webhook payload matches the terminal response of the corresponding GET endpoint. ## Response ### 200 Successful Response - `id` (string, required) — The unique identifier of the generation. Pass it to the corresponding GET endpoint to retrieve the output. - `status` ("pending", required) — A newly created generation is always `pending`. ## Errors ### 422 Unprocessable Entity Error Validation Error - `detail` (list of ValidationError, optional) ## Types ### PronunciationDictionaryVersionLocator A pronunciation dictionary to apply during speech synthesis. - `pronunciation_dictionary_id` (string, required) — The ID of a pronunciation dictionary created via `POST /v1/pronunciation-dictionaries/add-from-file` or `POST /v1/pronunciation-dictionaries/add-from-rules`. - `version_id` (string, optional, nullable) — The version of the dictionary to use. Omit to use the latest version. ### ElevenFlashV2_5VoiceSettings Overrides for the voice's saved settings, applied to one generation. - `stability` (double, optional, nullable) — How consistent the voice stays across generations. Lower values give more expressive, varied speech. - `similarity_boost` (double, optional, nullable) — How closely the output adheres to the original voice. - `speed` (double, optional, nullable) — The speed of the generated speech, where 1.0 is the voice's natural pace. ### WebhookTarget - `type`: `all` (WebhookTargetAll) - `type`: `ids` (WebhookTargetIds) - `ids` (list of string, required) — The IDs of the workspace flows webhooks to deliver the result to. Each must be one of the workspace's configured flows webhooks. ### TtsVoiceSettings Overrides for the voice's saved settings, applied to one generation. - `stability` (double, optional, nullable) — How consistent the voice stays across generations. Lower values give more expressive, varied speech. - `similarity_boost` (double, optional, nullable) — How closely the output adheres to the original voice. - `style` (double, optional, nullable) — How strongly the speaking style is exaggerated. - `use_speaker_boost` (boolean, optional, nullable) — Whether to boost similarity to the original speaker, at some latency cost. - `speed` (double, optional, nullable) — The speed of the generated speech, where 1.0 is the voice's natural pace. ### ElevenV3VoiceSettings Overrides for the voice's saved settings, applied to one generation. - `stability` (double, optional, nullable) — How consistent the voice stays across generations. Lower values give more expressive, varied speech. ### ValidationError - `loc` (list of ValidationErrorLocItems, required) - `msg` (string, required) - `type` (string, required) ### ValidationErrorLocItems ## Examples **Request** ```json { "model_id": "string", "text": "The first move is what sets everything in motion.", "voice": "JBFqnCBsd6RMkjVDRZzb" } ``` **Response** ```json { "id": "JWr5N6X9ZTqf8jD2LmQb", "status": "pending" } ``` **SDK Code** ```python import requests url = "https://api.elevenlabs.io/v1/flows/text-to-speech" payload = { "model_id": "string", "text": "The first move is what sets everything in motion.", "voice": "JBFqnCBsd6RMkjVDRZzb" } headers = {"Content-Type": "application/json"} response = requests.post(url, json=payload, headers=headers) print(response.json()) ``` ```javascript const url = 'https://api.elevenlabs.io/v1/flows/text-to-speech'; const options = { method: 'POST', headers: {'Content-Type': 'application/json'}, body: '{"model_id":"string","text":"The first move is what sets everything in motion.","voice":"JBFqnCBsd6RMkjVDRZzb"}' }; try { const response = await fetch(url, options); const data = await response.json(); console.log(data); } catch (error) { console.error(error); } ``` ```go package main import ( "fmt" "strings" "net/http" "io" ) func main() { url := "https://api.elevenlabs.io/v1/flows/text-to-speech" payload := strings.NewReader("{\n \"model_id\": \"string\",\n \"text\": \"The first move is what sets everything in motion.\",\n \"voice\": \"JBFqnCBsd6RMkjVDRZzb\"\n}") req, _ := http.NewRequest("POST", url, payload) req.Header.Add("Content-Type", "application/json") res, _ := http.DefaultClient.Do(req) defer res.Body.Close() body, _ := io.ReadAll(res.Body) fmt.Println(res) fmt.Println(string(body)) } ``` ```ruby require 'uri' require 'net/http' url = URI("https://api.elevenlabs.io/v1/flows/text-to-speech") http = Net::HTTP.new(url.host, url.port) http.use_ssl = true request = Net::HTTP::Post.new(url) request["Content-Type"] = 'application/json' request.body = "{\n \"model_id\": \"string\",\n \"text\": \"The first move is what sets everything in motion.\",\n \"voice\": \"JBFqnCBsd6RMkjVDRZzb\"\n}" response = http.request(request) puts response.read_body ``` ```java import com.mashape.unirest.http.HttpResponse; import com.mashape.unirest.http.Unirest; HttpResponse response = Unirest.post("https://api.elevenlabs.io/v1/flows/text-to-speech") .header("Content-Type", "application/json") .body("{\n \"model_id\": \"string\",\n \"text\": \"The first move is what sets everything in motion.\",\n \"voice\": \"JBFqnCBsd6RMkjVDRZzb\"\n}") .asString(); ``` ```php request('POST', 'https://api.elevenlabs.io/v1/flows/text-to-speech', [ 'body' => '{ "model_id": "string", "text": "The first move is what sets everything in motion.", "voice": "JBFqnCBsd6RMkjVDRZzb" }', 'headers' => [ 'Content-Type' => 'application/json', ], ]); echo $response->getBody(); ``` ```csharp using RestSharp; var client = new RestClient("https://api.elevenlabs.io/v1/flows/text-to-speech"); var request = new RestRequest(Method.POST); request.AddHeader("Content-Type", "application/json"); request.AddParameter("application/json", "{\n \"model_id\": \"string\",\n \"text\": \"The first move is what sets everything in motion.\",\n \"voice\": \"JBFqnCBsd6RMkjVDRZzb\"\n}", ParameterType.RequestBody); IRestResponse response = client.Execute(request); ``` ```swift import Foundation let headers = ["Content-Type": "application/json"] let parameters = [ "model_id": "string", "text": "The first move is what sets everything in motion.", "voice": "JBFqnCBsd6RMkjVDRZzb" ] as [String : Any] let postData = JSONSerialization.data(withJSONObject: parameters, options: []) let request = NSMutableURLRequest(url: NSURL(string: "https://api.elevenlabs.io/v1/flows/text-to-speech")! as URL, cachePolicy: .useProtocolCachePolicy, timeoutInterval: 10.0) request.httpMethod = "POST" request.allHTTPHeaderFields = headers request.httpBody = postData as Data let session = URLSession.shared let dataTask = session.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) -> Void in if (error != nil) { print(error as Any) } else { let httpResponse = response as? HTTPURLResponse print(httpResponse) } }) dataTask.resume() ``` > ElevenLabs provides APIs and SDKs for text to speech, voice cloning, speech to text, sound effects, voice isolator, voice changer, and conversational AI agents. Build voice-enabled applications with lifelike audio generation.