Cartesia Integration

Voice AI — Sonic text-to-speech, Ink speech-to-text, voice clone, and Line agents (calls, batches, phone numbers, knowledge base). Use Cartesia inside visual AI workflows to move from generated results to real actions. Combine Download Call Audio with Download File or Export Metric Results to keep repetitive work moving automatically.

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Supported triggers and actions for Cartesia integration

Triggers can detect changes in Cartesia and run actions that can create, search or modify data inside Cartesia automatically [3] — exactly how you set them.

Watch EventsTriggers on Cartesia Line call events (call_started, call_completed, call_failed, call_turn, post_call_analysis).
Watch Metric ResultsTriggers when new metric evaluation results are created.
Download Call AudioDownloads the WAV recording of a call.
Download FileDownloads the raw binary content of a file.
Export Metric ResultsExports metric results as a CSV file. Capped at 100,000 rows.
Get AgentReturns details for a single agent.
Get Agent UsageReturns agent usage bucketed by time interval. Requires an admin key.
Get API KeyReturns metadata for a single API key. Requires an admin key.
Get API StatusReturns the current API status and version. No authentication required.
Get CallReturns details for a single call.
Get Call BatchReturns details for a single call batch including recipients.
Get Call LogsReturns structured logs for a call.
Get Credit UsageReturns credit usage bucketed by time interval. Requires an admin key.
Get DatasetReturns details for a single dataset.
Get DeploymentReturns details for a single deployment.
Get DocumentReturns a single document with full content.
Get File InfoReturns metadata for a single file.
Get Fine-TuneReturns details for a single fine-tune job.
Get FolderReturns a folder with its agents and documents.
Get MetricReturns details for a single metric.
Get Organization InviteReturns details for a single invite. Requires an admin key.
Get Organization UserReturns details for a single organization member. Requires an admin key.
Get Phone NumberReturns details for a single phone number.
Get Pronunciation DictionaryReturns a pronunciation dictionary with all its items.
Get ProviderReturns details for a single phone number provider.
Get VoiceReturns details for a single voice by ID.
Get WebhookReturns a webhook endpoint. Secret is not included.
List AccentsReturns the full catalog of available voice accents.
List Agent Phone NumbersReturns phone numbers attached to an agent. Deprecated — prefer List Phone Numbers.
List Agent TemplatesReturns publicly available Cartesia agent templates.
List AgentsReturns all agents in the organization.
List API KeysReturns API key metadata for the organization. Requires an admin key.
List Call BatchesReturns a cursor-paginated list of outbound call batches.
List CallsReturns a cursor-paginated list of calls for an agent.
List Dataset FilesReturns a cursor-paginated list of files in a dataset.
List DatasetsReturns a cursor-paginated list of fine-tuning datasets.
List DeploymentsReturns all deployments for an agent.
List DocumentsReturns a cursor-paginated list of knowledge base documents.
List FilesReturns a cursor-paginated list of uploaded files.
List Fine-Tune VoicesReturns voices produced by a fine-tune job.
List Fine-TunesReturns a cursor-paginated list of fine-tune jobs.
List FoldersReturns knowledge base folders for agents.
List Metric ResultsReturns a cursor-paginated list of agent metric results, optionally filtered by date range.
List MetricsReturns a cursor-paginated list of agent evaluation metrics.
List Organization InvitesReturns pending and accepted invites. Requires an admin key.
List Organization UsersReturns organization members newest-first. Requires an admin key.
List Phone NumbersReturns a cursor-paginated list of phone numbers.
List Pronunciation DictionariesReturns a cursor-paginated list of pronunciation dictionaries.
List ProvidersReturns all configured phone number providers (Twilio, SIP trunk).
List VoicesReturns a cursor-paginated list of available voices.
List WebhooksReturns a cursor-paginated list of webhook endpoints. Secret is not included.
Add Metric to AgentAttaches an evaluation metric to an agent.
Bulk Create DocumentsCreates up to 100 knowledge base documents in a single request.
Cancel CallCancels an in-progress call.
Cancel Call BatchCancels a call batch. In-flight calls finish before the batch is cancelled.
Clone VoiceClones a voice from an audio clip.
Create Call BatchCreates an outbound call batch. Supports up to 5,000 recipients.
Create DatasetCreates a fine-tuning dataset.
Create DocumentCreates a knowledge base document. Content is JSON text (not a file upload), capped at 1 MB.
Create Fine-TuneStarts a new fine-tune job.
Create FolderCreates a knowledge base folder. Maximum 3 levels of nesting.
Create MetricCreates a new agent evaluation metric.
Create Organization InviteSends invites to one or more emails. All-or-nothing. Rate limited to 10 requests per hour. Requires an admin key.
Create Outbound CallInitiates one or more outbound calls immediately. Tip: max one call per second to avoid hitting the concurrency limit.
Create Pronunciation DictionaryCreates a new pronunciation dictionary.
Create ProviderConnects a Twilio account or SIP trunk as a phone number provider.
Create WebhookCreates a new webhook endpoint.
Delete AgentPermanently deletes an agent.
Delete Call DataRedacts transcript, audio, and logs for a completed or failed call.
Delete DatasetPermanently deletes a dataset.
Delete Dataset FileRemoves a file from a dataset.
Delete DocumentPermanently deletes a document.
Delete FilePermanently deletes a file.
Delete Fine-TunePermanently deletes a fine-tune job.
Delete FolderPermanently deletes a folder.
Delete MetricDeletes a metric. Detaches from all agents; existing results are retained.
Delete Organization InviteCancels a pending invite. Requires an admin key.
Delete Phone NumberRemoves a phone number.
Delete Pronunciation DictionaryPermanently deletes a pronunciation dictionary.
Delete ProviderRemoves a phone number provider.
Delete VoicePermanently deletes a voice.
Delete WebhookDeletes a webhook endpoint.
Generate Infill AudioGenerates audio that fills a gap between two audio clips.
Generate SpeechConverts text to speech and returns binary audio bytes.
Generate Speech (SSE)Streams text-to-speech audio as Server-Sent Events.
Import Phone NumberImports a phone number from a linked provider.
Localize VoiceCreates a localized copy of a voice for a different accent.
Make an API CallPerforms an arbitrary authorized API request to the Cartesia API.
Provision Phone NumberProvisions a Cartesia-managed US phone number.
Remove Metric from AgentDetaches an evaluation metric from an agent.
Remove Organization UserRemoves a non-admin user from the organization. Does not delete their account. Requires an admin key.
Retry Call BatchRetries failed or unanswered calls in a batch. Cancelled batches cannot be retried.
Transcribe AudioTranscribes an audio file to text using the Ink Whisper model.
Update AgentUpdates agent settings including name, description, TTS voice, and webhook.
Update DatasetUpdates a dataset.
Update DocumentUpdates document content, name, metadata, or folder.
Update FolderUpdates folder name, parent, documents, or agents.
Update Phone NumberUpdates phone number label, agent assignment, or provider.
Update Pronunciation DictionaryUpdates a pronunciation dictionary.
Update ProviderUpdates a phone number provider configuration.
Update VoiceUpdates voice metadata (name, tagline, description, gender, accent, access).
Update WebhookUpdates a webhook URL, secret, or display name. Omit secret to keep existing.
Upload Dataset FileUploads a file to a dataset.
Upload FileUploads a file.

How to integrate Cartesia in automation workflow?

3 simple steps to make your Cartesia connected with other apps in automation workflows on WEXTL. Up to 10 minutes integration set up.

STEP 1

Select Cartesia in workflow

Pick Cartesia app in the workflow builder [4] - just one click to select the app.

STEP 2

Connect Cartesia

When prompted, authorize access to Cartesia in WEXTL once. Cartesia credentials are encrypted and never shared with WEXTL. Authorization will be reused in any future API calls [3].

WEXTL wants to integrate with your Cartesia account. Approve?

STEP 3

Build a workflow

Build your workflow with Cartesia yourself or with WEXTL® AI Builder. Connect Cartesia to any available integrations [5], or use HTTP node to go beyond them.

Cartesia

How Cartesia connects and integrates with WEXTL

Save and approve your credentials once — WEXTL® stores authorization information encrypted and reuses the authentication whenever Cartesia app is called in workflows. That allows your ai automations to run without your attention, per defined schedule [7]. Explore documentation [6] for a detailed list of fields that Cartesia supports.

Full Cartesia API documentation

The following table illustrates what fields Cartesia integration require during authorization flow inside our workflow builder [4].

Demonstration of Cartesia connection step inside WEXTL Workflow Builder [4].

Field	Type	Help
API KeyRequired	password	Get your key at play.cartesia.ai/keys. Prefix sk_car_.

Connect Cartesia to popular apps on WEXTL

Enter a name of the other app you want to sync with Cartesia below. Click on selected app to explore integration options with Cartesia. If the app you search for is not available in WEXTL yet, you can use HTTP node [10] instead to integrate it directly.

Example automation with Cartesia integration

Select Watch Metric Results trigger from Cartesia - this will be a starting point in your automation. Whenever event happens in Cartesia, workflow will start [7] from Watch Metric Results node.

Search for Add Metric to Agent, connect it as the next step of integration sequence. You can use filters between Watch Metric Results and Add Metric to Agent, so only important data pass from Watch Metric Results to the next step. WEXTL gives you full control over the process of Cartesia automation. All parts of workflow are visible on the canvas [4].

Cartesia on WEXTL has 104 modules for combining ai automations. Explore Cartesia documentation for more.

Cartesia

Watch Metric Results

ElevenLabs

Performs action

ElevenLabs

Triggers

Cartesia

Add Metric to Agent

Demonstration of how visual Cartesia automation [6] looks in WEXTL.

Frequently asked questions

Common questions about automating Cartesia in your workflows.

Cartesia has 2 triggers, including "Watch Events" and "Watch Metric Results". Triggers are start points of the workflow, and automations may start from them.

Integration has 102 actions, including "Download Call Audio", "Download File", and "Export Metric Results", and more. Refer to our Cartesia Documentation for detailed inputs and outputs.

No. Most automations are built visually on the canvas by picking triggers, actions, and mapping fields. You can add custom JavaScript with Functions when advanced logic is needed — but our customers do that in rare cases [4].

Yes. Connections are authenticated per account, credentials are encrypted at rest, and you can enforce approvals and team-level access controls on any automation.

The Cartesia integration on WEXTL runs directly on its vendor public API — every field name, authentication method, and rate limit is controlled by Cartesia official API and covered in documentation [3]. WEXTL handles the request signing and pagination for you.

Absolutely. Where Cartesia provides native webhooks, you can use instant triggers to eliminate polling delay. For custom webhooks, WEXTL offers Custom Webhook node, so you can start automation whenever Cartesia or any other service sends event to webhook URL.

WEXTL is an AI-first visual canvas. The platform allows you to describe automation in plain text — and AI will wire nodes for Cartesia inside the workflow builder [4]. You can also use built-in workflow nodes (AI Agent, Human in the Loop, Condition, Aggregate Results) in pair with Cartesia modules to craft complex integration flows with branches, filtering, and conditional logic. There are absolutely no limits of what you can build.

References

List of sources used to gather information about the Cartesia integration.

Cartesia integration source code, module specs and credentials implementation.
Internal Cartesia integration documentation, structured input and output parameters, scopes, and authentication methods.
Official Cartesia vendor API documentation — used to verify field meanings, authentication flows, and anything our own specs don't fully capture.
WEXTL® Visual Workflow Builder, anonymized data from our technical support team.
WEXTL® Apps Library
WEXTL® Cartesia App Documentation
WEXTL® Workflow Scheduler
WEXTL® HTTP node documentation

Cartesia Integration

Supported triggers and actions for Cartesia integration