--- title: "Cartesia MCP server for AI agents - actionlake" description: "Give Claude 108 Cartesia actions through one MCP server: datasets, voices, agents, calls. Your agent never holds the credential. 100,000 calls a month free." canonical: https://actionlake.com/connectors/cartesia updated: 2026-10-23 --- Connectors · AI # Cartesia MCP server for AI agents. actionlake is an MCP gateway: one remote MCP server that connects Claude and other MCP clients to Cartesia and the rest of your systems. It gives your agent 108 Cartesia actions (54 reads, 32 writes and 22 that wait for a confirmation) and holds the Cartesia credential itself, so the agent never does. It paces Cartesia's limits and records every call. [Connect Cartesia free](https://actionlake.com/console?start=sandbox) [See pricing](https://actionlake.com/pricing) 100,000 free calls a month. No card, no email, no password: press Start a free sandbox on the next screen and keep the key it shows you. `claude mcp add --transport http actionlake https://connect.actionlake.com/mcp` the first call ``` do { action: "cartesia.folders.list", intent: "check which Cartesia account is connected" } # List Folders · read · 1 upstream call ``` - 108 actions in one signed file - 54 read look, never change - 32 write create and update - 22 wait for a yes destructive, confirmed first Set up ## Connect Cartesia in three steps. 1. 01 ### Add actionlake to Claude. Run the command once in Claude Code; its consent page can create a free sandbox: 100,000 calls a month, no card. In the Claude app, add a custom connector with the URL below and paste your key on the consent page. Creating a new sandbox from the Claude app is not yet tested by us. `https://connect.actionlake.com/mcp` 2. 02 ### Connect Cartesia. API key. No consent screen: your agent can connect it for you, but the key then passes through your chat. To keep it out of the model's context, paste it in the console instead. actionlake stores what you paste write-only, sealed under your tenant's key. - `api_key` Cartesia API key (sk_car_...): create one at play.cartesia.ai/keys ``` account { op: "connections.requirements", service: "cartesia" } # free: exactly what to paste, and what is found for you ``` 3. 03 ### Make the first call. Check before a write. Ask in plain words; Claude picks the action. Before anything changes, `check` validates the call and prices it, for free. ``` do { action: "cartesia.folders.list" } # list folders · read · 1 upstream call check { action: "cartesia.folders.create", input: { … } } # free: inputs, permissions, cost and confirmations, nothing sent ``` Cartesia at a glance **Sign-in** API key. No consent screen: your agent can connect it for you, but the key then passes through your chat. To keep it out of the model's context, paste it in the console instead. **You provide** `api_key` **Limits we pace to** 5 calls a second, per connection **API covered** Cartesia API (Cartesia-Version 2026-08-14; OpenAPI 3 per reference page)`api.cartesia.ai` **Built from** Cartesia's documentation, read 23 October 2026[docs.cartesia.ai](https://docs.cartesia.ai/api-reference/voices/list.md) [docs.cartesia.ai](https://docs.cartesia.ai/sitemap.xml) **Service file** Version 1.0.0, signed (Ed25519) **Cached reads** 52 of 54 reads, for up to 5 minutes; a write clears what it affects **Shared entities** 4, so ask can line Cartesia up with your other systems **Data** Processed and stored in Sydney, Australia. No US region yet Capabilities ## What an AI agent can do in Cartesia. 108 actions in 28 areas. Every one carries its effect, so a key can allow the reads and hold the rest. - **54** read look, never change - **32** write create and update - **22** destructive wait for a confirmation 1. ### Datasets 7 3 read · 2 write · 2 destructive Create a new dataset · Paginated list of datasets · Paginated list of files in a dataset · Retrieve a specific dataset by ID 2. ### Voices 7 2 read · 3 write · 2 destructive List Voices · Localize Voice · Add Voice Accents · Get Voice 3. ### Agents 6 4 read · 1 write · 1 destructive List Agents · List Phone Numbers (Deprecated) · List Templates · Get Agent 4. ### Calls 6 3 read · 1 write · 2 destructive List Calls · Create Outbound Call · Get Call · Delete Call 5. ### Documents 6 2 read · 3 write · 1 destructive List Documents · Create Document · Get Document · Update Document 6. ### Metrics 6 2 read · 2 write · 2 destructive Add Metric to Agent · Create Metric · List Metrics · Get Metric 7. ### Phone numbers 6 2 read · 3 write · 1 destructive Import Phone Number · List Phone Numbers · Provision Cartesia Number · Get Phone Number 8. ### Agent tools 5 2 read · 2 write · 1 destructive Create a tool · List tools · Get a tool · Update a tool **20 more areas · 59 actions** - Call batches **5** - Fine tunes **5** - Folders **5** - Line agents **5** - Pronunciation dicts **5** - Telephony providers **5** - Webhooks **5** - Org invites **4** - Files **3** - Org users **3** - API keys **2** - Deployments **2** - Line agent versions **2** - Usage **2** - Accents **1** - Access tokens **1** - API **1** - Line agent models **1** - Metric results **1** - Models **1** Top actions ## The Cartesia API, shaped for agents. The ids your agent types, what each does, and the one name it shares with other systems. 16 of Cartesia's 16 action names are shared with at least one other connector, so an agent learns them once. | Action | What it does | Effect | Same name in | | --- | --- | --- | --- | | `cartesia.folders.list` List Folders | List Folders. | read | `content.folder.list` 62 connectors | | `cartesia.documents.list` List Documents | List Documents. | read | `content.document.list` 28 connectors | | `cartesia.calls.list` List Calls | List Calls. | read | `comm.call.list` 44 connectors | | `cartesia.folders.create` Create Folder | Create Folder. | write | `content.folder.create` 62 connectors | | `cartesia.org_users.list` List Users | List Users. | read | `identity.user.list` 474 connectors | | `cartesia.documents.create` Create Document | Create Document. | write | `content.document.create` 29 connectors | | `cartesia.folders.delete` Delete Folder | Delete Folder. | destructive | `content.folder.delete` 46 connectors | | `cartesia.calls.create_outbound` Create Outbound Call | Create Outbound Call. | write | `comm.call.create` 38 connectors | | `cartesia.org_users.get` Get User | Get User. | read | `identity.user.get` 399 connectors | | `cartesia.agents.list` List Agents | List Agents. | read | this connector | | `cartesia.voices.list` List Voices | List Voices. | read | this connector | | `cartesia.voices.localize` Localize Voice | Localize Voice. | write | this connector | Try it ## Prompts to paste into Claude. Each one names the Cartesia actions it will call, so you know what it reads and what it changes before you send it. 1. Read read Who has access in Cartesia? List every user and their role. calls `cartesia.org_users.list` 2. Write write Create Folder in Cartesia. Show me exactly what you will send before you save it. calls `cartesia.folders.create` Governance for Cartesia ## Destructive actions wait for a yes. 22 Cartesia actions are destructive. These are all of them: - Delete Folder `cartesia.folders.delete` - Delete Document `cartesia.documents.delete` - Delete Call `cartesia.calls.delete` - Delete Agent `cartesia.agents.delete` - Delete Voice `cartesia.voices.delete` - Delete an agent `cartesia.line_agents.delete` - Delete Voice Accent `cartesia.voices.delete_accent` - Cancel Call `cartesia.calls.cancel` - Delete an uploaded file `cartesia.files.delete` - Delete Metric `cartesia.metrics.delete` - Delete a dataset `cartesia.datasets.delete` - Delete Webhook `cartesia.webhooks.delete` - Remove User `cartesia.org_users.remove` - Delete a fine-tune `cartesia.fine_tunes.delete` - Delete a tool `cartesia.agent_tools.delete` - Remove a file from a dataset `cartesia.datasets.delete_file` - Delete Phone Number `cartesia.phone_numbers.delete` - Remove Metric from Agent `cartesia.metrics.remove_from_agent` - Delete a pronunciation dictionary `cartesia.pronunciation_dicts.delete` - Delete Provider `cartesia.telephony_providers.delete` - Cancel Invite `cartesia.org_invites.cancel` - Cancel Call Batch `cartesia.call_batches.cancel` A destructive action runs only with `confirm: true`. Under the `human` policy the agent cannot confirm for itself: the run stops until a named person approves, in the console or from a signed link in an email. The cap on a key is refused before the call is sent, never after. do cartesia.folders.delete confirm_policy: **human** Delete Folder? **intent:** the user asked me to delete Folder run suspended · waiting for a named person · key _cartesia-agent_ cannot confirm itself In the console, or from an emailed signed link. a key for this connector ``` account { op: "keys.create", name: "cartesia-agent", allowed_actions: ["cartesia.*"], cap_calls: 2000, confirm_policy: "human_for_writes", approval_rules: [ { match: "cartesia.folders.delete", approver: "lead@example.com" }, { match: "cartesia.documents.delete", approver: "lead@example.com" }, { match: "cartesia.calls.delete", approver: "lead@example.com" } ] } ``` Illustrative. Scoped to Cartesia only, capped at 2,000 upstream calls, every write confirmed, and the destructive ones approved by a named person. Cost ## What Cartesia costs on actionlake. Every Cartesia action is one upstream call, the only thing actionlake bills. Searching, `check`, `cost`, `account` and any call Cartesia refused with 401, 403, 429 or a 5xx are free. Paid plans start at US$49 a month for 250,000 calls, with overage from US$0.30 down to US$0.18 per 1,000. - 1 upstream call per action all 108 Cartesia actions - 108 actions page each page of a long list is one call - 52 reads can be cached a cache hit costs nothing - 100,000 calls a month, free paid plans from US$49 a month for 250,000 [See pricing](https://actionlake.com/pricing) Action index ## Every Cartesia action. 108 actions by area: the id your agent calls, what it does, and its effect. **Datasets 7** - `cartesia.datasets.create` Create a new dataset write - `cartesia.datasets.delete` Delete a dataset destructive - `cartesia.datasets.delete_file` Remove a file from a dataset destructive - `cartesia.datasets.get` Retrieve a specific dataset by ID read - `cartesia.datasets.list` Paginated list of datasets read - `cartesia.datasets.list_files` Paginated list of files in a dataset read - `cartesia.datasets.update` Update an existing dataset write **Voices 7** - `cartesia.voices.add_accents` Add Voice Accents write - `cartesia.voices.delete` Delete Voice destructive - `cartesia.voices.delete_accent` Delete Voice Accent destructive - `cartesia.voices.get` Get Voice read - `cartesia.voices.list` List Voices read - `cartesia.voices.localize` Localize Voice write - `cartesia.voices.update` Update Voice write **Agents 6** - `cartesia.agents.delete` Delete Agent destructive - `cartesia.agents.get` Get Agent read - `cartesia.agents.list` List Agents read - `cartesia.agents.list_phone_numbers` List Phone Numbers (Deprecated) read - `cartesia.agents.list_templates` List Templates read - `cartesia.agents.update` Update Agent write **Calls 6** - `cartesia.calls.cancel` Cancel Call destructive - `cartesia.calls.create_outbound` Create Outbound Call write - `cartesia.calls.delete` Delete Call destructive - `cartesia.calls.get` Get Call read - `cartesia.calls.get_logs` Get Call Runtime Logs read - `cartesia.calls.list` List Calls read **Documents 6** - `cartesia.documents.create` Create Document write - `cartesia.documents.create_bulk` Bulk Create Documents write - `cartesia.documents.delete` Delete Document destructive - `cartesia.documents.get` Get Document read - `cartesia.documents.list` List Documents read - `cartesia.documents.update` Update Document write **Metrics 6** - `cartesia.metrics.add_to_agent` Add Metric to Agent write - `cartesia.metrics.create` Create Metric write - `cartesia.metrics.delete` Delete Metric destructive - `cartesia.metrics.get` Get Metric read - `cartesia.metrics.list` List Metrics read - `cartesia.metrics.remove_from_agent` Remove Metric from Agent destructive **Phone numbers 6** - `cartesia.phone_numbers.delete` Delete Phone Number destructive - `cartesia.phone_numbers.get` Get Phone Number read - `cartesia.phone_numbers.import` Import Phone Number write - `cartesia.phone_numbers.list` List Phone Numbers read - `cartesia.phone_numbers.provision` Provision Cartesia Number write - `cartesia.phone_numbers.update` Update Phone Number write **Agent tools 5** - `cartesia.agent_tools.create` Create a tool write - `cartesia.agent_tools.delete` Delete a tool destructive - `cartesia.agent_tools.get` Get a tool read - `cartesia.agent_tools.list` List tools read - `cartesia.agent_tools.update` Update a tool write **Call batches 5** - `cartesia.call_batches.cancel` Cancel Call Batch destructive - `cartesia.call_batches.create` Create Call Batch write - `cartesia.call_batches.get` Get Call Batch read - `cartesia.call_batches.list` List Call Batches read - `cartesia.call_batches.retry` Retry Call Batch write **Fine tunes 5** - `cartesia.fine_tunes.create` Create a new fine-tune write - `cartesia.fine_tunes.delete` Delete a fine-tune destructive - `cartesia.fine_tunes.get` Retrieve a specific fine-tune by ID read - `cartesia.fine_tunes.list` Paginated list of all fine-tunes for the authenticated user read - `cartesia.fine_tunes.list_voices` List all voices created from a fine-tune read **Folders 5** - `cartesia.folders.create` Create Folder write - `cartesia.folders.delete` Delete Folder destructive - `cartesia.folders.get` Get Folder read - `cartesia.folders.list` List Folders read - `cartesia.folders.update` Update Folder write **Line agents 5** - `cartesia.line_agents.create` Create an agent write - `cartesia.line_agents.delete` Delete an agent destructive - `cartesia.line_agents.get` Get an agent read - `cartesia.line_agents.list` List agents read - `cartesia.line_agents.update` Update an agent write **Pronunciation dicts 5** - `cartesia.pronunciation_dicts.create` Create a new pronunciation dictionary write - `cartesia.pronunciation_dicts.delete` Delete a pronunciation dictionary destructive - `cartesia.pronunciation_dicts.get` Retrieve a specific pronunciation dictionary by ID read - `cartesia.pronunciation_dicts.list` List all pronunciation dictionaries for the authenticated user read - `cartesia.pronunciation_dicts.update` Update a pronunciation dictionary write **Telephony providers 5** - `cartesia.telephony_providers.create` Create Provider write - `cartesia.telephony_providers.delete` Delete Provider destructive - `cartesia.telephony_providers.get` Get Provider read - `cartesia.telephony_providers.list` List Providers read - `cartesia.telephony_providers.update` Update Provider write **Webhooks 5** - `cartesia.webhooks.create` Create Webhook write - `cartesia.webhooks.delete` Delete Webhook destructive - `cartesia.webhooks.get` Get Webhook read - `cartesia.webhooks.list` List Webhooks read - `cartesia.webhooks.update` Update Webhook write **Org invites 4** - `cartesia.org_invites.cancel` Cancel Invite destructive - `cartesia.org_invites.create` Create Invites write - `cartesia.org_invites.get` Get Invite read - `cartesia.org_invites.list` List Invites read **Files 3** - `cartesia.files.delete` Delete an uploaded file destructive - `cartesia.files.get` Retrieve a file's metadata read - `cartesia.files.list` Paginated list of your uploaded files read **Org users 3** - `cartesia.org_users.get` Get User read - `cartesia.org_users.list` List Users read - `cartesia.org_users.remove` Remove User destructive **API keys 2** - `cartesia.api_keys.get` Get API Key read - `cartesia.api_keys.list` List API Keys read **Deployments 2** - `cartesia.deployments.get` Get Deployment read - `cartesia.deployments.list` List Deployments read **Line agent versions 2** - `cartesia.line_agent_versions.get` Get an agent version read - `cartesia.line_agent_versions.list` List agent versions read **Usage 2** - `cartesia.usage.get_agents` Get Agent Usage read - `cartesia.usage.get_credits` Get Credit Usage read **Accents 1** - `cartesia.accents.list` List Accents read **Access tokens 1** - `cartesia.access_tokens.create` Generate a New Access Token write **API 1** - `cartesia.api.get_status` API Status and Version read **Line agent models 1** - `cartesia.line_agent_models.list` List agent models read **Metric results 1** - `cartesia.metric_results.list` List Metric Results read **Models 1** - `cartesia.models.list` List Models read Questions ## The Cartesia MCP server, answered. **Is there a Cartesia MCP server for Claude?** Yes. actionlake is an MCP gateway: a remote MCP server that gives Claude, or another MCP client, 108 Cartesia actions across datasets, voices, agents and calls, through the same eight tools it uses for every other connector. actionlake is independent; it is not made or endorsed by Cartesia. **What do I need to connect Cartesia?** Cartesia API key (sk_car_...): create one at play.cartesia.ai/keys. The free call account { op: "connections.requirements", service: "cartesia" } lists exactly what to paste. **Can an AI agent delete or change things in Cartesia?** Only if its key allows it, and only with an explicit confirmation. 22 Cartesia actions are destructive, including delete Folder, delete Document and delete Call. Each runs only with confirm: true. Under the human confirm policy, or an approval rule on the key, the run waits until a named person approves it. **Will an AI agent use up my Cartesia API limit?** actionlake paces every call to the limits in the Cartesia service file: 5 calls a second per connection. Repeated reads are answered from cache (52 Cartesia actions can be), which never reaches Cartesia. **What does a Cartesia action cost?** One upstream call, the only unit actionlake bills. A list that pages bills one call per page (108 Cartesia actions page). Cache hits, searches, dry runs and calls Cartesia refused with 401, 403, 429 or a 5xx are free. The Free plan includes 100,000 calls a month with no card. Paid plans start at US$49 a month for 250,000 calls, with overage from US$0.30 down to US$0.18 per 1,000. **Which Cartesia API does it cover?** The Cartesia API (Cartesia-Version 2026-08-14; OpenAPI 3 per reference page) at api.cartesia.ai. It is built from Cartesia's documentation as read on 23 October 2026. 108 actions in 28 areas, each one in the signed service file (version 1.0.0). **Does actionlake keep my Cartesia data, and where?** actionlake processes and stores data in Sydney, Australia; there is no US region yet. Reads may be cached for up to 5 minutes, and a write clears the reads it affects. Each run's request and response is kept, sealed, for your plan's trace window: 1 day on Free, 3 days on Starter, 7 days on Pro, 14 days on Team, 30 days on Business and 30 days on Enterprise. Your Cartesia credential is sealed under your tenant's key, never logged and never returned. Your traffic is not used to train models. **Which AI clients can use it?** Claude Code, tested by us end to end, and the Claude app as a custom connector, tested by us with an existing key. Other MCP clients that support remote servers over Streamable HTTP (MCP revisions 2025-06-18 and 2025-11-25) and OAuth dynamic client registration, or a bearer header, should connect the same way; we have not tested them. Or plain REST, under the same action names. ## More connectors like Cartesia Shares the most action names with - [Voiceflow 8](https://actionlake.com/connectors/voiceflow) - [LlamaCloud 5](https://actionlake.com/connectors/llamacloud) - [Vapi 4](https://actionlake.com/connectors/vapi) - [Bland AI 3](https://actionlake.com/connectors/bland-ai) - [Runway API 3](https://actionlake.com/connectors/runway-api) - [AssemblyAI 3](https://actionlake.com/connectors/assemblyai) Joins with, on shared entities - [Filevine 3](https://actionlake.com/connectors/filevine) - [Clio Manage 3](https://actionlake.com/connectors/clio-manage) - [iManage Work 3](https://actionlake.com/connectors/imanage-work) - [Canvas LMS 2](https://actionlake.com/connectors/canvas-lms) - [Twilio 2](https://actionlake.com/connectors/twilio) - [Microsoft Dynamics 365 2](https://actionlake.com/connectors/microsoft-dynamics-365) Browse - [All AI connectors](https://actionlake.com/connectors/category/ai) - [All connectors](https://actionlake.com/connectors) - [How actionlake compares](https://actionlake.com/compare) actionlake is independent. It is not made or endorsed by Cartesia; the name is the vendor's own. Counts are from the Cartesia service file, version 1.0.0. ## Give your agent Cartesia today. [Connect Cartesia free](https://actionlake.com/console?start=sandbox) [See pricing](https://actionlake.com/pricing) Start free - 100,000 calls/month, no card. No signup. Hard caps on every key. Cached answers are free. --- Source: https://actionlake.com/connectors/cartesia More: https://actionlake.com/llms.txt