retell_get_voice
Retrieve voice configuration details from Retell AI's platform to manage AI phone agents and conversation flows.
Instructions
Retrieve details of a specific voice.
Input Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| voice_id | Yes | The voice ID to retrieve |
Implementation Reference
- src/index.ts:1247-1248 (handler)Switch case in executeTool function that handles the retell_get_voice tool by making a GET request to the Retell API endpoint `/get-voice/{voice_id}`.
case "retell_get_voice": return retellRequest(`/get-voice/${args.voice_id}`, "GET"); - src/index.ts:1004-1017 (schema)Tool definition in the tools array, including name, description, and input schema requiring 'voice_id'.
{ name: "retell_get_voice", description: "Retrieve details of a specific voice.", inputSchema: { type: "object", properties: { voice_id: { type: "string", description: "The voice ID to retrieve" } }, required: ["voice_id"] } }, - src/index.ts:23-57 (helper)Generic helper function that performs authenticated HTTP requests to the Retell AI API, used by all tool handlers including retell_get_voice.
async function retellRequest( endpoint: string, method: string = "GET", body?: Record<string, unknown> ): Promise<unknown> { const apiKey = getApiKey(); const headers: Record<string, string> = { "Authorization": `Bearer ${apiKey}`, "Content-Type": "application/json", }; const options: RequestInit = { method, headers, }; if (body && method !== "GET") { options.body = JSON.stringify(body); } const response = await fetch(`${RETELL_API_BASE}${endpoint}`, options); if (!response.ok) { const errorText = await response.text(); throw new Error(`Retell API error (${response.status}): ${errorText}`); } // Handle 204 No Content if (response.status === 204) { return { success: true }; } return response.json(); } - src/index.ts:1283-1285 (registration)Registration of the ListToolsRequestSchema handler that returns the full list of tools, including retell_get_voice.
server.setRequestHandler(ListToolsRequestSchema, async () => { return { tools }; }); - src/index.ts:1287-1313 (registration)Registration of the CallToolRequestSchema handler which dispatches to executeTool based on tool name, enabling execution of retell_get_voice.
// Register tool execution handler server.setRequestHandler(CallToolRequestSchema, async (request) => { const { name, arguments: args } = request.params; try { const result = await executeTool(name, args as Record<string, unknown>); return { content: [ { type: "text", text: JSON.stringify(result, null, 2), }, ], }; } catch (error) { const errorMessage = error instanceof Error ? error.message : String(error); return { content: [ { type: "text", text: `Error: ${errorMessage}`, }, ], isError: true, }; } });