JustCall MCP Server

export type ToolResponse = { content: Array<{ type: "text"; text: string }>; structuredContent?: any; _meta?: Record<string, any>; }; export function createSuccessResponse( data: any, openAiWidget?: boolean, ): ToolResponse { const response: ToolResponse = { content: [ { type: "text" as const, text: typeof data === "string" ? data : JSON.stringify(data), }, ], }; if (openAiWidget) { response.structuredContent = data; response.content = [ { type: "text" as const, text: "Calls List Widget", }, ]; response._meta = { "openai/outputTemplate": "ui://widget/calls-list.html", "openai/toolInvocation/invoking": "Fetching calls from JustCall", "openai/toolInvocation/invoked": "Calls fetched from JustCall", "openai/widgetAccessible": true, "openai/resultCanProduceWidget": true, }; } return response; } export function createErrorResponse(error: any): ToolResponse { const errorMessage = error?.message || String(error); return { content: [ { type: "text" as const, text: `Error: ${errorMessage}`, }, ], }; } export function createToolHandler<T>( handler: (params: T, context?: any) => Promise<any>, openAiWidget?: boolean, ): (params: T, context?: any) => Promise<ToolResponse> { return async (params: T, context?: any) => { try { const result = await handler(params, context); return createSuccessResponse(result, openAiWidget); } catch (error) { return createErrorResponse(error); } }; } /** * Get the auth token from the context * @param context - The context of the request * @returns The auth token */ export function getAuthToken(context?: any): string { const authHeader = context?.requestInfo?.headers.authorization; const apiKey = authHeader?.replace("Bearer ", ""); const authToken = apiKey ?? `${process.env.JUSTCALL_API_KEY}:${process.env.JUSTCALL_API_SECRET}`; return authToken; }