--- title: AI Audio & Speech API | RunAPI description: Text to speech, voice cloning, transcription, and sound effects through one public audio API. url: https://runapi.ai/audio.md canonical: https://runapi.ai/audio locale: en site: RunAPI image: https://runapi.ai/assets/opengraph-f702f2b1.png alternates: en: https://runapi.ai/audio zh-CN: https://runapi.ai/zh-CN/audio es: https://runapi.ai/es/audio ja: https://runapi.ai/ja/audio de: https://runapi.ai/de/audio fr: https://runapi.ai/fr/audio pt-BR: https://runapi.ai/pt-BR/audio ko: https://runapi.ai/ko/audio it: https://runapi.ai/it/audio nl: https://runapi.ai/nl/audio pl: https://runapi.ai/pl/audio tr: https://runapi.ai/tr/audio zh-TW: https://runapi.ai/zh-TW/audio zh-HK: https://runapi.ai/zh-HK/audio ar: https://runapi.ai/ar/audio x-default: https://runapi.ai/audio --- > HTML version: https://runapi.ai/audio > Site index for agents: https://runapi.ai/llms.txt # AI Audio & Speech API Text to speech, voice cloning, transcription, and sound effects through one public audio API. - [Get API Key](https://runapi.ai/login) - [Browse Models](https://runapi.ai/models.md) 32 audio models · 6 Providers · 89 Public endpoints ## Playground Your next audio render starts here. Choose a public model to inspect its current price and endpoint details. | Model | Provider | Modality | Price | | --- | --- | --- | --- | | [ElevenLabs/audio-isolation](https://runapi.ai/models/elevenlabs/audio-isolation.md) | ElevenLabs | Audio & Music | $0.12 / minute | | [Fish Audio](https://runapi.ai/models/fish-audio.md) | Fish Audio | Audio & Music | Free / track | | [Gemini Omni/gemini-omni-audio](https://runapi.ai/models/gemini-omni/audio.md) | Google | Audio & Music | Free / track | Mode: `text_to_speech` ## Quickstart ### Synthesize speech #### curl ```bash curl https://runapi.ai/api/v1/elevenlabs/text_to_speech \ -H "Authorization: Bearer $RUNAPI_API_KEY" \ -H "Content-Type: application/json" \ -d '{"model":"text-to-speech-multilingual-v2","text":"Welcome to RunAPI.","voice":"Adam","language_code":"en"}' ``` #### Python ```python import json import os import requests response = requests.post( "https://runapi.ai/api/v1/elevenlabs/text_to_speech", headers={"Authorization": f"Bearer {os.environ['RUNAPI_API_KEY']}"}, json=json.loads("{\"model\":\"text-to-speech-multilingual-v2\",\"text\":\"Welcome to RunAPI.\",\"voice\":\"Adam\",\"language_code\":\"en\"}") ) response.raise_for_status() print(response.json()) ``` #### Node.js ```javascript const response = await fetch("https://runapi.ai/api/v1/elevenlabs/text_to_speech", { method: "POST", headers: { "Authorization": "Bearer " + process.env.RUNAPI_API_KEY, "Content-Type": "application/json" }, body: JSON.stringify({"model":"text-to-speech-multilingual-v2","text":"Welcome to RunAPI.","voice":"Adam","language_code":"en"}) }); console.log(await response.json()); ``` #### Go ```go package main import ( "io" "net/http" "os" "strings" ) func main() { payload := strings.NewReader("{\"model\":\"text-to-speech-multilingual-v2\",\"text\":\"Welcome to RunAPI.\",\"voice\":\"Adam\",\"language_code\":\"en\"}") request, err := http.NewRequest("POST", "https://runapi.ai/api/v1/elevenlabs/text_to_speech", payload) if err != nil { panic(err) } request.Header.Set("Authorization", "Bearer "+os.Getenv("RUNAPI_API_KEY")) request.Header.Set("Content-Type", "application/json") response, err := http.DefaultClient.Do(request) if err != nil { panic(err) } defer response.Body.Close() io.Copy(os.Stdout, response.Body) } ``` #### Response ```json { "id": "tsk_example", "status": "processing" } ``` ## Four Steps to Your First Generation **How it works** 1. **Get Your API Key** - One key for all TTS and voice models. 2. **Pick a Voice** - Browse available voices across supported audio models. 3. **Send Text** - POST your text and voice selection to /api/v1/elevenlabs/text_to_speech. 4. **Get Audio** - Receive the generated audio from the task result. ### Explore ## More AI APIs - [Video API](https://runapi.ai/models?modality=video) - Generate, edit, and upscale video with 80 models [Learn more](https://runapi.ai/models?modality=video) - [Image API](https://runapi.ai/models?modality=image) - Create and transform images with 49 models [Learn more](https://runapi.ai/models?modality=image) - [Music API](https://runapi.ai/music) - Compose original tracks with AI [Learn more](https://runapi.ai/music) - [LLM API](https://runapi.ai/models?modality=text) - Chat completions with 66 language models [Learn more](https://runapi.ai/models?modality=text) ## What teams build with it - **Voice Agents**: Pair streaming TTS with an LLM and transcription for a full duplex voice loop on one key. - **Localization**: Dub existing video into new languages with a cloned voice that stays recognisable. - **Meeting Notes**: Transcribe with speaker labels, then summarise through the LLM endpoint in the same pipeline. - **Accessibility**: Add narration to articles, docs, and in-app content without a recording session. ## RunAPI vs alternatives | Feature | RunAPI | ElevenLabs Direct | OpenAI TTS | | --- | --- | --- | --- | | Voice models | 32 audio models | 1 provider | 6 voices | | Pricing | From $0.12 / minute | Official rate | Official rate | | Real-time streaming | Yes | Yes | No | | Unified billing | Yes | No | No | | MCP server | Yes | No | No | | Provider failover | Yes | No | No | ## Everything the audio endpoint can do - **Text to Speech** - Stream natural speech from text with per-request voice and speed control. - **Voice Cloning** - Build a reusable voice from a short reference sample, then call it by id like any other voice. - **Speech to Text** - Transcribe long-form audio with timestamps, speaker labels, and word-level confidence. - **Text to Sound** - Generate foley and sound effects from a description — impacts, ambience, UI cues. - **Text to Dialogue** - Render multi-speaker conversations with distinct voices and natural turn timing in one call. ## Audio models on one key | Model | Provider | Price | | --- | --- | --- | | ElevenLabs/audio-isolation | ElevenLabs | $0.12 / minute | | ElevenLabs/sound-effect-v2 | ElevenLabs | $0.15 / minute | | ElevenLabs/speech-to-text | ElevenLabs | $0.04 / minute | | ElevenLabs/text-to-dialogue-v3 | ElevenLabs | $0.14 / 1K chars | | ElevenLabs/text-to-speech-multilingual-v2 | ElevenLabs | $0.12 / 1K chars | | ElevenLabs/text-to-speech-turbo-v2.5 | ElevenLabs | $0.06 / 1K chars | [View all 32 audio models](https://runapi.ai/models?modality=audio_music.md) ## Why Developers Choose RunAPI - **One Key, All Models** - Stop juggling API keys. One integration gives you access to 230+ models across all providers. - **15-25% Cost Savings** - Our volume agreements with providers mean lower prices than going direct. No markup on top. - **Automatic Failover** - If a provider goes down, we route to the next best option. Your app stays up. - **OpenAI-Compatible** - Drop-in replacement for OpenAI SDK. Change one line of code to access any model. - **Real-Time Billing** - Pay only for what you use. Per-request pricing with no minimums. Track costs per model, per project. - **API Key Authentication** - Authenticate audio API requests with your RunAPI API key. ## Audio API questions ### How is TTS billed? Per 1,000 characters of input text at the model's rate. Transcription is billed per minute of audio. ### Can I clone a voice? Yes. Upload a reference sample to create a voice id, then pass that id on any later request. ### Is streaming supported? Streaming support depends on the selected endpoint. Check its documented response format before integrating playback. ### Which languages are covered? Language support varies by model. Check the selected model's documentation for supported languages. ### Do you keep audio or voice samples? Request and response content may be retained. See the Privacy Policy for data handling details. ### Can I get word-level timestamps? Timestamp support and granularity depend on the selected transcription endpoint. Check its documented response fields; speaker labels are a separate capability. ## Give your product a voice Speech, cloning, and transcription behind one key. Start free, no credit card required. - [Get API Key](https://runapi.ai/login) - [Read the Docs](https://runapi.ai/docs/guides) --- ## More from RunAPI - [Home](https://runapi.ai/.md) ### Product - [Model Catalog](https://runapi.ai/models.md) - [Pricing](https://runapi.ai/pricing.md) - [Providers](https://runapi.ai/models#all-models) ### Developers - [Documentation](https://runapi.ai/docs/guides) - [SDKs](https://runapi.ai/sdk.md) - [CLI](https://runapi.ai/cli.md) - [MCP Server](https://runapi.ai/mcp.md) ### Guides - [Claude Code vs Cursor](https://runapi.ai/claude-code-vs-cursor.md) - [Cursor API Setup](https://runapi.ai/cursor-api-setup.md) - [RunAPI vs OpenRouter](https://runapi.ai/openrouter-alternative.md) ### Company - [Enterprise](https://runapi.ai/contact.md) - [Contact](https://runapi.ai/contact.md) ### Legal - [Terms](https://runapi.ai/terms.md) - [Privacy](https://runapi.ai/privacy.md) - [Site index for agents](https://runapi.ai/llms.txt) Contact: contact@runapi.ai ## Structured data ```json [ { "@context": "https://schema.org", "inLanguage": "en", "@type": "WebSite", "name": "RunAPI", "url": "https://runapi.ai/", "potentialAction": { "@type": "SearchAction", "target": { "@type": "EntryPoint", "urlTemplate": "https://runapi.ai/models?q={search_term_string}" }, "query-input": "required name=search_term_string" } }, { "@context": "https://schema.org", "inLanguage": "en", "@type": "Organization", "name": "RunAPI", "url": "https://runapi.ai/", "logo": { "@type": "ImageObject", "url": "https://runapi.ai/icon.svg" }, "sameAs": [ "https://github.com/runapi-ai" ] }, { "@context": "https://schema.org", "inLanguage": "en", "@type": "CollectionPage", "name": "AI Audio & Speech API", "description": "Text to speech, voice cloning, transcription, and sound effects through one public audio API.", "url": "https://runapi.ai/audio" } ] ```