elevenlabs-v3 API
Generate ultra-realistic multi-voice dialogue with the ElevenLabs V3 API via API in One. Natural-sounding AI voices with multi-character conversations. 28 credits per 1000 characters.
Use this in the request body model field.
The currently implemented BFF route.
Input types: text
Keys are managed by the shared dashboard.
Use callback_url on supported async tasks.
Service highlights
Marketplace-style signals backed by the current live route, without copying external SLA, discount, login, or payment claims.
Live production route
This page only shows endpoints implemented under /api/v1. /api/v1/audio/speech
Webhook / polling
Use callback_url when supported, or poll the task status route for results.
Shared billing system
Top-up, orders, credit balance, and profile continue through the existing shared console.
Managed provider credentials
Your browser only holds an API in One key; provider calls stay server-side.
Call contract
Use these fields to integrate the current live model route.
- Base URL
https://apiin.oneClients call same-origin APIs; the server BFF forwards to the Worker.- Authorization
Authorization: Bearer <API_KEY>Managed by the existing Dashboard API Keys page.- Model field
elevenlabs-v3Send this value in the request body model field.- Result path
/api/v1/tasks/{task_id}Async jobs return task_id, then use status polling.- Billing path
/billing/creditsUses the existing credits, orders, and top-up logic.
Runtime behavior
This model creates an async task, returns a task_id, then resolves through the real status route.
Client request/api/v1/audio/speechtask_id -> result
View usage logsAPI Console
Switch between real models on this endpoint, choose a live route, and generate request examples from the current catalog payload.
Live model1 live models
Endpoint1 Routes
Request previewPOST /api/v1/audio/speech
curl --request POST \
--url https://apiin.one/api/v1/audio/speech \
--header 'Authorization: Bearer <API_KEY>'
--header 'Content-Type: application/json' \
--data-raw '{
"model": "elevenlabs-v3",
"dialogue": [
{
"text": "Hello, welcome to API in One.",
"voice": "narrator"
},
{
"text": "Thank you! Tell me more about this platform.",
"voice": "user"
}
],
"stability": 0.5,
"language_code": "auto"
}'Result path
Open docs/api/v1/tasks/{task_id}Endpoint decision panel
Evaluate cost, provider coverage, and production integration behavior across live models on this implemented endpoint.
Current model position1/1
Sorted by base credits from low to high.
Production patternAsync task + webhook/polling
Use callback_url when supported, or poll the task status route for results.
Live capabilities
These capabilities come from the current model config and backend route. Unreleased APIs are not listed.
Multi
Multi-character dialogue in a single request
Use the same API in One key as the rest of the routed catalog
Use the same API in One key as the rest of the routed catalog
30+ languages with automatic language detection
30+ languages with automatic language detection
Same API key for TTS
Same API key for TTS, images, video, music, and chat
Request format
Clients call same-origin API routes; the server BFF forwards to the matching Worker.
MethodEndpointCreditsPurpose
POST/api/v1/audio/speech1 creditsUltra-realistic text-to-speech with natural sounding voices. Supports multiple languages and voice styles.
Parameters
dialoguearrayArray of dialogue items: [{text: "...", voice: "..."}]. Voice is optional.
RequiredstabilitynumberVoice stability (0–1). Lower = more variation, higher = more consistent.
Optional · Default 0.5language_codestringLanguage code (e.g. en, zh, ja) or "auto" for detection
Optional · Default autoExample request
curl -X POST https://apiin.one/api/v1/audio/speech \
-H "Authorization: Bearer aio_your_api_key" \
-H "Content-Type: application/json" \
--data-raw '{
"model": "elevenlabs-v3",
"dialogue": [
{
"text": "Hello, welcome to API in One.",
"voice": "narrator"
},
{
"text": "Thank you! Tell me more about this platform.",
"voice": "user"
}
],
"stability": 0.5,
"language_code": "auto"
}'Integration flow
These steps use the current live route and shared account system; login, payment, orders, credits, and profile remain shared.
Create a shared API key
Create a key in the existing dashboard. Top-up, orders, credit balance, and profile stay in the shared console.
Call the real endpoint
Send a request with the endpoint, model id, and parameters shown on this page. /api/v1/audio/speech
Poll task status
Async media and tool jobs use /api/v1/tasks/{task_id}; chat models return a direct response.
Task status route
After creating image, video, audio, or tool tasks, poll the real task endpoint for results.
GET/api/v1/tasks/{task_id}Check generation task status and result.Pricing
1 credit minimum (~$0.01), then 28 credits per 1000 chars (~$0.28)
Base cost$0.01
Credits1
BillingSuccessful requests
Use cases
These workflows are supported by the current model and backend node.
Generate multi-character dialogue for podcasts and audiobooks
Build voice-enabled chatbots and virtual assistants
Create audiobook content with multiple narrators
Generate multilingual voice content for global audiences
FAQ
How much does the ElevenLabs API cost through API in One?
Pricing is 28 credits per 1000 characters (~$0.28). The final cost scales with text length.
What languages does the ElevenLabs V3 API support?
ElevenLabs V3 supports 30+ languages. Set language_code to "auto" for automatic detection or specify a language code.
Can I create multi-voice dialogue?
Yes. The dialogue parameter accepts an array of objects, each with text and an optional voice. This enables multi-character conversations.
What is the stability parameter?
The stability parameter (0–1) controls voice consistency. Lower values (0.3) add more variation, higher values (0.8) produce more consistent output. Default is 0.5.