Cartesia website screenshot

Cartesia

Cartesia builds real-time voice AI - the Sonic family of text-to-speech models, Ink speech-to-text models, and a Voice Agents platform for building and deploying telephone and web voice agents. The core generation surface is exposed both as REST (bytes and Server-Sent Events) and as a low-latency, bidirectional WebSocket protocol at wss://api.cartesia.ai for streaming TTS and STT with multiplexed contexts, word/phoneme timestamps, and mid-stream flush and cancel.

Cartesia publishes 21 APIs on the APIs.io network, including TTS WebSocket API, STT WebSocket API, Agents API, and 18 more. Tagged areas include Artificial Intelligence, Voice AI, Text-to-Speech, Speech-to-Text, and Real-Time.

The Cartesia catalog on APIs.io includes 1 event-driven AsyncAPI specification and 1 Spectral governance ruleset.

Cartesia’s developer surface includes authentication, engineering blog, documentation, pricing, and 13 more developer resources.

🌐 Visit website 📡 Source on GitHub
43.0/100 developing ▬ flat Agent 23/100 agent aware Full breakdown ↓
scored 2026-08-24 · rubric v0.13.0
AccessFreemiumSelf serve⚡ Free to try
21 APIs
Artificial IntelligenceVoice AIText-to-SpeechSpeech-to-TextReal-TimeWebSocketVoice CloningVoice Agents

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-08-24 · rubric v0.13.0
Composite quality — 43.0/100 · developing
Contract Quality 15.7 / 25
Developer Ergonomics 5.7 / 20
Access Clarity 10.0 / 20
Operational Transparency 4.4 / 13
Contract Governance 1.4 / 12
Discoverability 5.7 / 10
Agent readiness — 23/100 · agent aware
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
Documented Reversibility 6 / 6
MCP Server 0 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 7 / 7
Typed Event Surface 6 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
A2A Agent Card 0 / 8
Dry-Run / Simulate Mode 0 / 4
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/cartesia-ai: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 21

Individual APIs this provider publishes, each with its own machine-readable definition.

Cartesia TTS WebSocket API

Bidirectional, multiplexed WebSocket at wss://api.cartesia.ai/tts/websocket for realtime speech generation. Clients send JSON generation requests keyed by a context_id (continui...

Cartesia STT WebSocket API

Realtime transcription over WebSocket at wss://api.cartesia.ai/stt/websocket. Clients stream raw binary audio in 100ms chunks and issue finalize/close text commands; the server ...

Cartesia Agents API

Voice agent configuration and public templates.

Cartesia API Keys API

Standard API key metadata.

Cartesia Auth API

Short-lived, scoped access token generation.

Cartesia Calls API

Outbound call placement, batching, and history.

Cartesia Datasets API

Audio/text collections used to build custom fine-tunes and voices.

Cartesia Deployments API

Agent deployment inspection.

Cartesia Infill API

Generate audio that smoothly connects two existing audio segments.

Cartesia Knowledge Base API

Documents and folders used by agents.

Cartesia Metrics API

LLM-as-a-judge quality metrics for agents.

Cartesia Phone Numbers API

Telephony number provisioning and import.

Cartesia Pronunciation Dictionaries API

Custom pronunciation overrides referenced by TTS requests.

Cartesia Providers API

Linked telephony provider accounts.

Cartesia Speech-to-Text API

Batch transcription of an audio file of any length.

Cartesia Status API

API health and version.

Cartesia Text-to-Speech API

Single-shot and streamed speech generation over plain HTTP.

Cartesia Usage API

Credit and agent usage reporting.

Cartesia Voice Changer API

Transform speech into a different target voice.

Cartesia Voices API

Voice catalog management and voice cloning.

Cartesia Webhooks API

Webhook endpoint registration.

Scroll for all 21

Open Collections 24

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

API Collection

OPEN COLLECTION

Cartesia Agents API

OPEN COLLECTION

Cartesia Agents API Keys API

OPEN COLLECTION

Cartesia Agents Auth API

OPEN COLLECTION

Cartesia Agents Calls API

OPEN COLLECTION

Cartesia Agents Datasets API

OPEN COLLECTION

Cartesia Agents Deployments API

OPEN COLLECTION

Cartesia Agents Infill API

OPEN COLLECTION

Cartesia Agents Knowledge Base API

OPEN COLLECTION

Cartesia Agents Metrics API

OPEN COLLECTION

Cartesia Agents Phone Numbers API

OPEN COLLECTION

Cartesia Agents Pronunciation Dictionaries API

OPEN COLLECTION

Cartesia Agents Providers API

OPEN COLLECTION

Cartesia Agents Speech-to-Text API

OPEN COLLECTION

Cartesia Agents Status API

OPEN COLLECTION

Cartesia Auth STT API

OPEN COLLECTION

Cartesia Agents Text-to-Speech API

OPEN COLLECTION

Cartesia Auth TTS API

OPEN COLLECTION

Cartesia Agents Usage API

OPEN COLLECTION

Cartesia Agents Voice Changer API

OPEN COLLECTION

Cartesia Agents Voices API

OPEN COLLECTION

Cartesia Agents Webhooks API

OPEN COLLECTION

Cartesia API

OPEN COLLECTION

Cartesia API

OPEN COLLECTION

Scroll for all 24

GraphQL 1

GraphQL schemas published by this provider.

Cartesia GraphQL Schema

This document describes a conceptual GraphQL schema for the Cartesia real-time text-to-speech and voice cloning API. Cartesia's native interfaces are REST, server-sent events, a...

GRAPHQL

Pricing Plans 1

Published pricing tiers and plan structures.

Cartesia Ai Plans Pricing

6 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Cartesia Ai Rate Limits

15 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Cartesia Ai Finops

FINOPS

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Cartesia Realtime WebSocket API (TTS + STT)

AsyncAPI 2.6 description of Cartesia's **documented public WebSocket API**. Unlike most providers in this catalog, Cartesia publishes a real, bidirectional WebSocket protocol - ...

ASYNCAPI

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Cartesia API Rules

9 rules · 1 errors 8 warnings

SPECTRAL

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Cartesia Ai Authentication

http · 1 scheme

SECURITY

Cartesia Ai Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Cartesia Ai Agentic Access

86 operations · 48 acting

86 operations · 48 acting

AGENTIC

Resources

Documentation 1

Reference material describing how the API behaves

Documentation
Documentation

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess
 LlmsText
LlmsText

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity
 Authentication
Authentication

Operate 2

Status, limits, changes, and where to get help

RateLimits
RateLimits
 Discord
Discord

Commercial 5

Pricing, plans, and the legal terms of use

Plans
Plans
 FinOps
FinOps
 Pricing
Pricing
 TermsOfService
TermsOfService
 PrivacyPolicy
PrivacyPolicy

Company 3

The organization behind the API

Blog
Blog
 LinkedIn
LinkedIn
 Website
Website

Other 1

Properties that don't map to a standard resource type

X
X

Source (apis.yml)

apis.yml Raw ↑ 
aid: cartesia-ai
url: https://raw.githubusercontent.com/api-evangelist/cartesia-ai/refs/heads/main/apis.yml
name: Cartesia
kind: company
description: Cartesia builds real-time voice AI - the Sonic family of text-to-speech models, Ink speech-to-text models, and
  a Voice Agents platform for building and deploying telephone and web voice agents. The core generation surface is exposed
  both as REST (bytes and Server-Sent Events) and as a low-latency, bidirectional WebSocket protocol at wss://api.cartesia.ai
  for streaming TTS and STT with multiplexed contexts, word/phoneme timestamps, and mid-stream flush and cancel.
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  label: Freemium · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/cartesia-ai.png
tags:
- Artificial Intelligence
- Voice AI
- Text-to-Speech
- Speech-to-Text
- Real-Time
- WebSocket
- Voice Cloning
- Voice Agents
tags_raw:
- AI
- Voice AI
- Text to Speech
- Speech to Text
- Realtime
- WebSocket
- Voice Cloning
- Voice Agents
created: '2026-07-02'
modified: '2026-08-08'
specificationVersion: '0.23'
apis:
- aid: cartesia-ai:cartesia-ai-tts-websocket-api
  name: Cartesia TTS WebSocket API
  tags:
  - WebSocket
  - Text-to-Speech
  - Real-Time
  - Streaming
  tags_raw:
  - WebSocket
  - Text to Speech
  - Realtime
  - Streaming
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://docs.cartesia.ai/api-reference/tts/websocket
  baseURL: wss://api.cartesia.ai
  properties:
  - url: https://docs.cartesia.ai/api-reference/tts/websocket
    type: Documentation
  - url: asyncapi/cartesia-ai-asyncapi.yml
    type: AsyncAPI
  description: Bidirectional, multiplexed WebSocket at wss://api.cartesia.ai/tts/websocket for realtime speech generation.
    Clients send JSON generation requests keyed by a context_id (continuing a context preserves prosody across chunks of transcript)
    and receive base64-encoded audio chunks, optional word and phoneme timestamps, flush acknowledgements, and a final done
    message. A single connection scales to dozens of concurrent generation contexts.
- aid: cartesia-ai:cartesia-ai-stt-websocket-api
  name: Cartesia STT WebSocket API
  tags:
  - WebSocket
  - Speech-to-Text
  - Real-Time
  - Turn Detection
  tags_raw:
  - WebSocket
  - Speech to Text
  - Realtime
  - Turn Detection
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://docs.cartesia.ai/api-reference/stt/websocket
  baseURL: wss://api.cartesia.ai
  properties:
  - url: https://docs.cartesia.ai/api-reference/stt/turns/websocket
    type: Documentation
  - url: https://docs.cartesia.ai/api-reference/stt/websocket
    type: APIReference
  - url: asyncapi/cartesia-ai-asyncapi.yml
    type: AsyncAPI
  description: Realtime transcription over WebSocket at wss://api.cartesia.ai/stt/websocket. Clients stream raw binary audio
    in 100ms chunks and issue finalize/close text commands; the server returns incremental and final transcript messages with
    word-level timing. A companion "Auto" variant at /stt/turns/websocket adds built-in turn detection for conversational
    agents.
- aid: cartesia-ai:cartesia-ai-agents-api
  name: Cartesia Agents API
  description: Voice agent configuration and public templates.
  humanURL: https://docs.cartesia.ai/api-reference/tts/bytes
  baseURL: https://api.cartesia.ai
  tags:
  - Agents
  properties:
  - type: OpenAPI
    url: openapi/cartesia-ai-agents-api-openapi.yml
  - type: Documentation
    url: https://docs.cartesia.ai/build-with-cartesia/tts-models/latest
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/tts/bytes
  - type: Documentation
    url: https://docs.cartesia.ai/build-with-cartesia/stt/latest
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/stt/transcribe
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/voices/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/voice-changer/bytes
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/infill/bytes
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/datasets/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/pronunciation-dicts/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/api-keys/list
  - type: Documentation
    url: https://docs.cartesia.ai/api-reference/auth/access-token
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/agents/agents/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/usage/credits
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/usage/agents
- aid: cartesia-ai:cartesia-ai-api-keys-api
  name: Cartesia API Keys API
  description: Standard API key metadata.
  humanURL: https://docs.cartesia.ai/api-reference/tts/bytes
  baseURL: https://api.cartesia.ai
  tags:
  - APIKeys
  tags_raw:
  - API Keys
  properties:
  - type: OpenAPI
    url: openapi/cartesia-ai-api-keys-api-openapi.yml
  - type: Documentation
    url: https://docs.cartesia.ai/build-with-cartesia/tts-models/latest
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/tts/bytes
  - type: Documentation
    url: https://docs.cartesia.ai/build-with-cartesia/stt/latest
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/stt/transcribe
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/voices/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/voice-changer/bytes
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/infill/bytes
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/datasets/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/pronunciation-dicts/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/api-keys/list
  - type: Documentation
    url: https://docs.cartesia.ai/api-reference/auth/access-token
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/agents/agents/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/usage/credits
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/usage/agents
- aid: cartesia-ai:cartesia-ai-auth-api
  name: Cartesia Auth API
  description: Short-lived, scoped access token generation.
  humanURL: https://docs.cartesia.ai/api-reference/tts/bytes
  baseURL: https://api.cartesia.ai
  tags:
  - Authentication
  tags_raw:
  - Auth
  properties:
  - type: OpenAPI
    url: openapi/cartesia-ai-auth-api-openapi.yml
  - type: Documentation
    url: https://docs.cartesia.ai/build-with-cartesia/tts-models/latest
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/tts/bytes
  - type: Documentation
    url: https://docs.cartesia.ai/build-with-cartesia/stt/latest
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/stt/transcribe
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/voices/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/voice-changer/bytes
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/infill/bytes
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/datasets/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/pronunciation-dicts/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/api-keys/list
  - type: Documentation
    url: https://docs.cartesia.ai/api-reference/auth/access-token
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/agents/agents/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/usage/credits
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/usage/agents
- aid: cartesia-ai:cartesia-ai-calls-api
  name: Cartesia Calls API
  description: Outbound call placement, batching, and history.
  humanURL: https://docs.cartesia.ai/api-reference/tts/bytes
  baseURL: https://api.cartesia.ai
  tags:
  - Calls
  properties:
  - type: OpenAPI
    url: openapi/cartesia-ai-calls-api-openapi.yml
  - type: Documentation
    url: https://docs.cartesia.ai/build-with-cartesia/tts-models/latest
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/tts/bytes
  - type: Documentation
    url: https://docs.cartesia.ai/build-with-cartesia/stt/latest
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/stt/transcribe
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/voices/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/voice-changer/bytes
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/infill/bytes
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/datasets/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/pronunciation-dicts/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/api-keys/list
  - type: Documentation
    url: https://docs.cartesia.ai/api-reference/auth/access-token
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/agents/agents/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/usage/credits
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/usage/agents
- aid: cartesia-ai:cartesia-ai-datasets-api
  name: Cartesia Datasets API
  description: Audio/text collections used to build custom fine-tunes and voices.
  humanURL: https://docs.cartesia.ai/api-reference/tts/bytes
  baseURL: https://api.cartesia.ai
  tags:
  - Datasets
  properties:
  - type: OpenAPI
    url: openapi/cartesia-ai-datasets-api-openapi.yml
  - type: Documentation
    url: https://docs.cartesia.ai/build-with-cartesia/tts-models/latest
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/tts/bytes
  - type: Documentation
    url: https://docs.cartesia.ai/build-with-cartesia/stt/latest
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/stt/transcribe
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/voices/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/voice-changer/bytes
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/infill/bytes
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/datasets/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/pronunciation-dicts/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/api-keys/list
  - type: Documentation
    url: https://docs.cartesia.ai/api-reference/auth/access-token
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/agents/agents/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/usage/credits
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/usage/agents
- aid: cartesia-ai:cartesia-ai-deployments-api
  name: Cartesia Deployments API
  description: Agent deployment inspection.
  humanURL: https://docs.cartesia.ai/api-reference/tts/bytes
  baseURL: https://api.cartesia.ai
  tags:
  - Deployment
  tags_raw:
  - Deployments
  properties:
  - type: OpenAPI
    url: openapi/cartesia-ai-deployments-api-openapi.yml
  - type: Documentation
    url: https://docs.cartesia.ai/build-with-cartesia/tts-models/latest
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/tts/bytes
  - type: Documentation
    url: https://docs.cartesia.ai/build-with-cartesia/stt/latest
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/stt/transcribe
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/voices/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/voice-changer/bytes
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/infill/bytes
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/datasets/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/pronunciation-dicts/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/api-keys/list
  - type: Documentation
    url: https://docs.cartesia.ai/api-reference/auth/access-token
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/agents/agents/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/usage/credits
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/usage/agents
- aid: cartesia-ai:cartesia-ai-infill-api
  name: Cartesia Infill API
  description: Generate audio that smoothly connects two existing audio segments.
  humanURL: https://docs.cartesia.ai/api-reference/tts/bytes
  baseURL: https://api.cartesia.ai
  tags:
  - Infill
  properties:
  - type: OpenAPI
    url: openapi/cartesia-ai-infill-api-openapi.yml
  - type: Documentation
    url: https://docs.cartesia.ai/build-with-cartesia/tts-models/latest
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/tts/bytes
  - type: Documentation
    url: https://docs.cartesia.ai/build-with-cartesia/stt/latest
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/stt/transcribe
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/voices/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/voice-changer/bytes
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/infill/bytes
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/datasets/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/pronunciation-dicts/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/api-keys/list
  - type: Documentation
    url: https://docs.cartesia.ai/api-reference/auth/access-token
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/agents/agents/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/usage/credits
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/usage/agents
- aid: cartesia-ai:cartesia-ai-knowledge-base-api
  name: Cartesia Knowledge Base API
  description: Documents and folders used by agents.
  humanURL: https://docs.cartesia.ai/api-reference/tts/bytes
  baseURL: https://api.cartesia.ai
  tags:
  - Knowledge Base
  properties:
  - type: OpenAPI
    url: openapi/cartesia-ai-knowledge-base-api-openapi.yml
  - type: Documentation
    url: https://docs.cartesia.ai/build-with-cartesia/tts-models/latest
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/tts/bytes
  - type: Documentation
    url: https://docs.cartesia.ai/build-with-cartesia/stt/latest
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/stt/transcribe
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/voices/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/voice-changer/bytes
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/infill/bytes
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/datasets/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/pronunciation-dicts/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/api-keys/list
  - type: Documentation
    url: https://docs.cartesia.ai/api-reference/auth/access-token
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/agents/agents/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/usage/credits
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/usage/agents
- aid: cartesia-ai:cartesia-ai-metrics-api
  name: Cartesia Metrics API
  description: LLM-as-a-judge quality metrics for agents.
  humanURL: https://docs.cartesia.ai/api-reference/tts/bytes
  baseURL: https://api.cartesia.ai
  tags:
  - Metrics
  properties:
  - type: OpenAPI
    url: openapi/cartesia-ai-metrics-api-openapi.yml
  - type: Documentation
    url: https://docs.cartesia.ai/build-with-cartesia/tts-models/latest
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/tts/bytes
  - type: Documentation
    url: https://docs.cartesia.ai/build-with-cartesia/stt/latest
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/stt/transcribe
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/voices/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/voice-changer/bytes
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/infill/bytes
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/datasets/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/pronunciation-dicts/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/api-keys/list
  - type: Documentation
    url: https://docs.cartesia.ai/api-reference/auth/access-token
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/agents/agents/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/usage/credits
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/usage/agents
- aid: cartesia-ai:cartesia-ai-phone-numbers-api
  name: Cartesia Phone Numbers API
  description: Telephony number provisioning and import.
  humanURL: https://docs.cartesia.ai/api-reference/tts/bytes
  baseURL: https://api.cartesia.ai
  tags:
  - Phone Numbers
  properties:
  - type: OpenAPI
    url: openapi/cartesia-ai-phone-numbers-api-openapi.yml
  - type: Documentation
    url: https://docs.cartesia.ai/build-with-cartesia/tts-models/latest
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/tts/bytes
  - type: Documentation
    url: https://docs.cartesia.ai/build-with-cartesia/stt/latest
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/stt/transcribe
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/voices/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/voice-changer/bytes
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/infill/bytes
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/datasets/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/pronunciation-dicts/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/api-keys/list
  - type: Documentation
    url: https://docs.cartesia.ai/api-reference/auth/access-token
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/agents/agents/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/usage/credits
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/usage/agents
- aid: cartesia-ai:cartesia-ai-pronunciation-dictionaries-api
  name: Cartesia Pronunciation Dictionaries API
  description: Custom pronunciation overrides referenced by TTS requests.
  humanURL: https://docs.cartesia.ai/api-reference/tts/bytes
  baseURL: https://api.cartesia.ai
  tags:
  - Pronunciation Dictionaries
  properties:
  - type: OpenAPI
    url: openapi/cartesia-ai-pronunciation-dictionaries-api-openapi.yml
  - type: Documentation
    url: https://docs.cartesia.ai/build-with-cartesia/tts-models/latest
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/tts/bytes
  - type: Documentation
    url: https://docs.cartesia.ai/build-with-cartesia/stt/latest
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/stt/transcribe
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/voices/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/voice-changer/bytes
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/infill/bytes
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/datasets/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/pronunciation-dicts/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/api-keys/list
  - type: Documentation
    url: https://docs.cartesia.ai/api-reference/auth/access-token
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/agents/agents/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/usage/credits
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/usage/agents
- aid: cartesia-ai:cartesia-ai-providers-api
  name: Cartesia Providers API
  description: Linked telephony provider accounts.
  humanURL: https://docs.cartesia.ai/api-reference/tts/bytes
  baseURL: https://api.cartesia.ai
  tags:
  - Providers
  properties:
  - type: OpenAPI
    url: openapi/cartesia-ai-providers-api-openapi.yml
  - type: Documentation
    url: https://docs.cartesia.ai/build-with-cartesia/tts-models/latest
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/tts/bytes
  - type: Documentation
    url: https://docs.cartesia.ai/build-with-cartesia/stt/latest
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/stt/transcribe
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/voices/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/voice-changer/bytes
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/infill/bytes
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/datasets/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/pronunciation-dicts/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/api-keys/list
  - type: Documentation
    url: https://docs.cartesia.ai/api-reference/auth/access-token
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/agents/agents/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/usage/credits
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/usage/agents
- aid: cartesia-ai:cartesia-ai-speech-to-text-api
  name: Cartesia Speech-to-Text API
  description: Batch transcription of an audio file of any length.
  humanURL: https://docs.cartesia.ai/api-reference/tts/bytes
  baseURL: https://api.cartesia.ai
  tags:
  - Speech-to-Text
  properties:
  - type: OpenAPI
    url: openapi/cartesia-ai-speech-to-text-api-openapi.yml
  - type: Documentation
    url: https://docs.cartesia.ai/build-with-cartesia/tts-models/latest
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/tts/bytes
  - type: Documentation
    url: https://docs.cartesia.ai/build-with-cartesia/stt/latest
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/stt/transcribe
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/voices/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/voice-changer/bytes
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/infill/bytes
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/datasets/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/pronunciation-dicts/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/api-keys/list
  - type: Documentation
    url: https://docs.cartesia.ai/api-reference/auth/access-token
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/agents/agents/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/usage/credits
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/usage/agents
- aid: cartesia-ai:cartesia-ai-status-api
  name: Cartesia Status API
  description: API health and version.
  humanURL: https://docs.cartesia.ai/api-reference/tts/bytes
  baseURL: https://api.cartesia.ai
  tags:
  - Status
  properties:
  - type: OpenAPI
    url: openapi/cartesia-ai-status-api-openapi.yml
  - type: Documentation
    url: https://docs.cartesia.ai/build-with-cartesia/tts-models/latest
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/tts/bytes
  - type: Documentation
    url: https://docs.cartesia.ai/build-with-cartesia/stt/latest
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/stt/transcribe
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/voices/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/voice-changer/bytes
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/infill/bytes
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/datasets/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/pronunciation-dicts/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/api-keys/list
  - type: Documentation
    url: https://docs.cartesia.ai/api-reference/auth/access-token
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/agents/agents/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/usage/credits
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/usage/agents
- aid: cartesia-ai:cartesia-ai-text-to-speech-api
  name: Cartesia Text-to-Speech API
  description: Single-shot and streamed speech generation over plain HTTP.
  humanURL: https://docs.cartesia.ai/api-reference/tts/bytes
  baseURL: https://api.cartesia.ai
  tags:
  - Text-to-Speech
  properties:
  - type: OpenAPI
    url: openapi/cartesia-ai-text-to-speech-api-openapi.yml
  - type: Documentation
    url: https://docs.cartesia.ai/build-with-cartesia/tts-models/latest
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/tts/bytes
  - type: Documentation
    url: https://docs.cartesia.ai/build-with-cartesia/stt/latest
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/stt/transcribe
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/voices/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/voice-changer/bytes
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/infill/bytes
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/datasets/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/pronunciation-dicts/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/api-keys/list
  - type: Documentation
    url: https://docs.cartesia.ai/api-reference/auth/access-token
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/agents/agents/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/usage/credits
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/usage/agents
- aid: cartesia-ai:cartesia-ai-usage-api
  name: Cartesia Usage API
  description: Credit and agent usage reporting.
  humanURL: https://docs.cartesia.ai/api-reference/tts/bytes
  baseURL: https://api.cartesia.ai
  tags:
  - Usage
  properties:
  - type: OpenAPI
    url: openapi/cartesia-ai-usage-api-openapi.yml
  - type: Documentation
    url: https://docs.cartesia.ai/build-with-cartesia/tts-models/latest
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/tts/bytes
  - type: Documentation
    url: https://docs.cartesia.ai/build-with-cartesia/stt/latest
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/stt/transcribe
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/voices/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/voice-changer/bytes
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/infill/bytes
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/datasets/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/pronunciation-dicts/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/api-keys/list
  - type: Documentation
    url: https://docs.cartesia.ai/api-reference/auth/access-token
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/agents/agents/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/usage/credits
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/usage/agents
- aid: cartesia-ai:cartesia-ai-voice-changer-api
  name: Cartesia Voice Changer API
  description: Transform speech into a different target voice.
  humanURL: https://docs.cartesia.ai/api-reference/tts/bytes
  baseURL: https://api.cartesia.ai
  tags:
  - Voice Changer
  properties:
  - type: OpenAPI
    url: openapi/cartesia-ai-voice-changer-api-openapi.yml
  - type: Documentation
    url: https://docs.cartesia.ai/build-with-cartesia/tts-models/latest
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/tts/bytes
  - type: Documentation
    url: https://docs.cartesia.ai/build-with-cartesia/stt/latest
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/stt/transcribe
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/voices/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/voice-changer/bytes
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/infill/bytes
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/datasets/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/pronunciation-dicts/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/api-keys/list
  - type: Documentation
    url: https://docs.cartesia.ai/api-reference/auth/access-token
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/agents/agents/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/usage/credits
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/usage/agents
- aid: cartesia-ai:cartesia-ai-voices-api
  name: Cartesia Voices API
  description: Voice catalog management and voice cloning.
  humanURL: https://docs.cartesia.ai/api-reference/tts/bytes
  baseURL: https://api.cartesia.ai
  tags:
  - Voices
  properties:
  - type: OpenAPI
    url: openapi/cartesia-ai-voices-api-openapi.yml
  - type: Documentation
    url: https://docs.cartesia.ai/build-with-cartesia/tts-models/latest
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/tts/bytes
  - type: Documentation
    url: https://docs.cartesia.ai/build-with-cartesia/stt/latest
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/stt/transcribe
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/voices/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/voice-changer/bytes
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/infill/bytes
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/datasets/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/pronunciation-dicts/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/api-keys/list
  - type: Documentation
    url: https://docs.cartesia.ai/api-reference/auth/access-token
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/agents/agents/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/usage/credits
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/usage/agents
- aid: cartesia-ai:cartesia-ai-webhooks-api
  name: Cartesia Webhooks API
  description: Webhook endpoint registration.
  humanURL: https://docs.cartesia.ai/api-reference/tts/bytes
  baseURL: https://api.cartesia.ai
  tags:
  - Webhook
  tags_raw:
  - Webhooks
  properties:
  - type: OpenAPI
    url: openapi/cartesia-ai-webhooks-api-openapi.yml
  - type: Documentation
    url: https://docs.cartesia.ai/build-with-cartesia/tts-models/latest
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/tts/bytes
  - type: Documentation
    url: https://docs.cartesia.ai/build-with-cartesia/stt/latest
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/stt/transcribe
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/voices/list
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/voice-changer/bytes
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/infill/bytes
  - type: APIReference
    url: https://docs.cartesia.ai/api-reference/datasets/list
  - type: APIReference
    url

# --- truncated at 32 KB (33 KB total) ---
# Full source: https://raw.githubusercontent.com/api-evangelist/cartesia-ai/refs/heads/main/apis.yml

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