How to Use Cartesia MCP Server with Bifrost
Connect to the Cartesia voice platform to perform text-to-speech, voice cloning etc.
[ MCP SERVER SUMMARY ]
Cartesia MCP server summary
Connect to the Cartesia voice platform to perform text-to-speech, voice cloning etc. Connect Cartesia through Bifrost MCP Gateway to centralize access control, virtual keys, and tool-call observability for your AI assistants.
| Property | Details |
|---|---|
| Company | Upstream maintainer |
| Connection type | Confirm upstream transport |
| Authentication | Varies by upstream server |
| Package or endpoint | See upstream documentation |
| Capabilities | Cartesia tools over MCP, AI assistant connectivity, Governed tool access through Bifrost |
| Official documentation | Cartesia MCP documentation |
Before you start
- Review the Cartesia upstream documentation for its installation requirements
- Obtain any credentials required by the upstream service
- A running Bifrost MCP Gateway instance
What you can do with Cartesia
- Connect to the Cartesia voice platform to perform text-to-speech, voice cloning etc.
- Expose Cartesia tools to Claude, Cursor, and other MCP clients through one endpoint
- Apply virtual keys, tool allowlists, and audit logging at the gateway
[ HOW TO CONNECT ]
Connect Cartesia to Bifrost in three steps
Install Bifrost
Start the gateway locally or deploy in your VPC.
npx -y @maximhq/bifrost
Add Cartesia in MCP Gateway
Open MCP Gateway in the Bifrost dashboard, click New MCP Server, and select the transport documented by the upstream server. Or register via the API below.
• Confirm the transport, command or endpoint, and authentication requirements in the Cartesia upstream documentation.
• Replace every placeholder in the example before sending the request.
Point clients at Bifrost /mcp
Configure Claude Desktop, Cursor, or Claude Code to use your Bifrost endpoint with a virtual key instead of connecting directly to Cartesia.
{
"mcpServers": {
"bifrost": {
"url": "http://localhost:8080/mcp",
"headers": {
"Authorization": "Bearer vk_your_virtual_key"
}
}
}
}[ EXAMPLE CONFIG ]
Register Cartesia via API
Add this MCP client with a POST to /api/mcp/client. See Connecting to MCP Servers for full options.
# For a remote HTTP or SSE server:
curl -X POST http://localhost:8080/api/mcp/client \
-H "Content-Type: application/json" \
-d '{
"name": "cartesia",
"connection_type": "<http|sse>",
"connection_string": "<upstream MCP endpoint>",
"tools_to_execute": ["*"]
}'
# For a local STDIO server:
curl -X POST http://localhost:8080/api/mcp/client \
-H "Content-Type: application/json" \
-d '{
"name": "cartesia",
"connection_type": "stdio",
"stdio_config": {
"command": "<upstream command>",
"args": ["<arg>"]
},
"tools_to_execute": ["*"]
}'[ WHY BIFROST ]
Run Cartesia through one governed gateway
Access control
Virtual keys, RBAC, and tool allowlists per team or agent.
Cost governance
Attribute MCP tool spend alongside LLM usage in one view.
Observability
Log every tool call with latency, server, and virtual key metadata.
Credential isolation
Upstream secrets stay in the gateway — not on every laptop.
[ FAQ ]
Common questions
What does the Cartesia MCP server do?
Connect to the Cartesia voice platform to perform text-to-speech, voice cloning etc. The exact tools available depend on the upstream server version and configuration.
How do I connect Cartesia to Bifrost?
Check the upstream documentation to determine whether Cartesia uses STDIO, Streamable HTTP, or SSE. Then add it as an MCP client in Bifrost using the corresponding command or endpoint.
Does Bifrost replace the Cartesia MCP server?
No. Bifrost connects to Cartesia as an upstream MCP client and adds a governed gateway between that server and your AI assistants.
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