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The connector URL is https://mcp.rime.ai. The server speaks stateless Streamable HTTP, and both the root URL and https://mcp.rime.ai/mcp serve the MCP endpoint. Use whichever your client expects. You can connect without any credentials to browse the voice catalog and generate integration code. To use synthesis and the linguistics tools, add your API key. See Authentication.

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Claude Code

Omit the --header flag to connect without a key.

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Claude.ai and Claude Desktop

In Claude, open Settings → Connectors, select Add custom connector, and enter https://mcp.rime.ai.

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OpenAI Codex

You can also add the server to ~/.codex/config.toml directly. The Codex IDE extension reads the same file, so one entry covers both:
Codex reads the key from the RIME_API_KEY environment variable rather than storing it in the config. Omit --bearer-token-env-var (or the bearer_token_env_var line) to connect without a key.

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Other MCP clients

For clients that use a JSON configuration (Cursor, Windsurf, and others), this entry connects with your key in the Authorization header:
This file holds your key in plain text, so keep it out of version control. Remove the headers block to connect without a key.

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Verify the connection

Ask your assistant to list Rime’s voices, or call list_voices directly. It needs no API key, so it confirms connectivity regardless of how you authenticated. To check the key too, ask for a normalize_text preview: if it returns a sign-up pointer instead of normalized text, the server didn’t receive your key.