# 01Router — Gateway API reference > A single REST API for image, video, audio and chat models across fal.ai, Replicate, WaveSpeedAI, KIE AI, APIMart, EvoLink, AtlasCloud, Vercel AI Gateway and OpenRouter. Base URL: https://01router.com/api/v1 Documentation: https://01router.com/docs Index: https://01router.com/docs/llms.txt?locale=en Full reference: https://01router.com/docs/llms-full.txt?locale=en Generation, task history, cancellation and chat require a key. Catalogs, prompts and quotes are public. Keep the API key on your server. Responses are illustrative. IDs, usage, prices and results depend on the actual request. ## Model reference Source: https://01router.com/docs/models/elevenlabs-tts-v4-turbo # ElevenLabs Eleven v4 Turbo API ElevenLabs Eleven v4 Turbo: expressive multilingual speech with audio tags, voice selection and delivery controls. `POST /api/v1/generations` Bearer API key ## Input parameters | Field | Type | Required | Description | Constraints | | --- | --- | --- | --- | --- | | model | string | yes | Model slug from the catalog. Project keys may use a project-specific model slug. | options: [ "elevenlabs-tts-v4-turbo" ] | | input | object | yes | Model-specific input object. See the selected model reference for required fields, defaults and limits. | | | provider | string | no | Optional provider slug. Omit for automatic routing; project settings may pin the provider. | | | project | string | no | Optional project ID. Use its published model catalog and routing configuration. | | | callback_url | string | no | Public HTTPS URL, up to 1,000 characters. Receives the final generation object. Private network addresses are rejected. | | | input.prompt | string | yes | | maxLength: 5000 | | input.voice | string | no | | default: "Rachel" | | input.stability | number | no | | default: 0.5; min: 0; max: 1 | | input.similarity_boost | number | no | | default: 0.75; min: 0; max: 1 | | input.language_code | string | no | ISO 639-1, e.g. en or zh | | | input.seed | integer | no | | min: 0; max: 4294967295 | | input.output_format | enum | no | | default: "mp3_44100_128"; options: [ "mp3_22050_32", "mp3_44100_32", "mp3_44100_64", "mp3_44100_96", "mp3_44100_128", "mp3_44100_192", "pcm_8000", "pcm_16000", "pcm_22050", "pcm_24000", "pcm_44100", "pcm_48000", "ulaw_8000", "alaw_8000", "opus_48000_32", "opus_48000_64", "opus_48000_96", "opus_48000_128", "opus_48000_192" ] | | input.apply_text_normalization | enum | no | | default: "auto"; options: [ "auto", "on", "off" ] | ## Response fields | Field | Type | Required | Description | Constraints | | --- | --- | --- | --- | --- | | id | string | — | Generation ID returned by the create request. | | | object | "generation" | — | generation | | | model | string | — | Model slug from the catalog. Project keys may use a project-specific model slug. | | | type | video \| image \| audio \| chat | — | | | | provider | string | — | Optional provider slug. Omit for automatic routing; project settings may pin the provider. | | | status | string | — | queued / processing / succeeded / failed. Stop polling on succeeded or failed. | | | input | object | — | Model-specific input object. See the selected model reference for required fields, defaults and limits. | | | outputs | string[] | — | Result file URLs. Empty until available; download promptly because URLs may expire. | | | error | string \| null | — | Error message on failure; null otherwise. | | | credits | number | — | Credits charged for this generation; zero after a refund. | | | price_usd | number | — | Price of this generation in USD; zero after a refund. | | | created_at | string | — | Creation time in ISO 8601 format. | | | completed_at | string \| null | — | Completion time in ISO 8601 format, or null while running. | | ## cURL ```bash curl 'https://01router.com/api/v1/generations' \ -H "Authorization: Bearer $API_KEY" \ -H "Content-Type: application/json" \ -d '{ "model": "elevenlabs-tts-v4-turbo", "input": { "prompt": "A cinematic landscape at sunrise.", "voice": "Rachel", "stability": 0.5, "similarity_boost": 0.75, "output_format": "mp3_44100_128", "apply_text_normalization": "auto" } }' ``` ## 200 · application/json ```json { "id": "gen_example", "object": "generation", "model": "elevenlabs-tts-v4-turbo", "type": "audio", "provider": "fal", "status": "processing", "input": { "prompt": "A cinematic landscape at sunrise.", "voice": "Rachel", "stability": 0.5, "similarity_boost": 0.75, "output_format": "mp3_44100_128", "apply_text_normalization": "auto" }, "outputs": [], "error": null, "credits": 100, "price_usd": 1, "created_at": "2026-10-25T08:00:00.000Z", "completed_at": null } ``` ## Usage notes - Poll at intervals of at least 3 seconds. A 504 from the synchronous image endpoint means the task may still be running: poll its error.id instead of submitting it again. ## Endpoints for this model - [POST /api/v1/generations](https://01router.com/docs/llms-full.txt?locale=en§ion=create): Create a generation - [GET /api/v1/generations/{id}](https://01router.com/docs/llms-full.txt?locale=en§ion=poll): Get the result - [POST /api/v1/generations/{id}/cancel](https://01router.com/docs/llms-full.txt?locale=en§ion=cancel): Cancel a task - [POST /api/v1/quote](https://01router.com/docs/llms-full.txt?locale=en§ion=quote): Quote - [GET /api/v1/models/{slug}](https://01router.com/docs/llms-full.txt?locale=en§ion=model-detail): Get one model For /generations and /quote, put these parameters inside input. For /images/generations, put them at the top level. Chat parameters go at the top level of /chat/completions. Select a provider to see its effective parameter limits. Automatic routing chooses a provider that supports your input. Examples include defaults and required inputs; replace example media URLs with accessible files. ### Provider parameter schemas ```json [ { "provider": "fal", "params": [ { "name": "prompt", "type": "text", "label": "Text", "required": true, "maxLength": 5000 }, { "name": "voice", "type": "string", "label": "Voice", "default": "Rachel" }, { "name": "stability", "type": "number", "label": "Stability", "min": 0, "max": 1, "default": 0.5 }, { "name": "similarity_boost", "type": "number", "label": "Voice similarity", "min": 0, "max": 1, "default": 0.75 }, { "name": "language_code", "type": "string", "label": "Language code", "description": "ISO 639-1, e.g. en or zh" }, { "name": "seed", "type": "integer", "label": "Seed", "min": 0, "max": 4294967295 }, { "name": "output_format", "type": "enum", "label": "Output format", "options": [ "mp3_22050_32", "mp3_44100_32", "mp3_44100_64", "mp3_44100_96", "mp3_44100_128", "mp3_44100_192", "pcm_8000", "pcm_16000", "pcm_22050", "pcm_24000", "pcm_44100", "pcm_48000", "ulaw_8000", "alaw_8000", "opus_48000_32", "opus_48000_64", "opus_48000_96", "opus_48000_128", "opus_48000_192" ], "default": "mp3_44100_128" }, { "name": "apply_text_normalization", "type": "enum", "label": "Text normalization", "options": [ "auto", "on", "off" ], "default": "auto" } ] }, { "provider": "wavespeed", "params": [ { "name": "prompt", "type": "text", "label": "Text", "required": true, "maxLength": 5000 }, { "name": "voice", "type": "string", "label": "Voice", "default": "Alicia" }, { "name": "stability", "type": "number", "label": "Stability", "min": 0, "max": 1, "default": 0.5 }, { "name": "similarity_boost", "type": "number", "label": "Voice similarity", "min": 0, "max": 1, "default": 0.75 } ] }, { "provider": "openrouter", "params": [ { "name": "prompt", "type": "text", "label": "Text", "required": true, "maxLength": 5000 }, { "name": "voice", "type": "string", "label": "Voice", "default": "george", "options": [ "george", "sarah", "adam", "alice", "bella", "bill", "brian", "callum", "charlie", "chris", "daniel", "eric", "harry", "jessica", "laura", "liam", "lily", "matilda", "river", "roger", "will" ] } ] } ] ``` ---